Clemco MB Series User manual
MB SERIES
ABRASIVE
VACUUM SYSTEMS
O. M. 30801
DATE OF ISSUE: 06/22
REVISION:
© 2022 CLEMCO INDUSTRIES CORP.
One Cable Car Dr.
Washington, MO 63090
Phone (636) 239-4300
Fax (800) 726-7559
Email: info@clemcoindustries.com
www.clemcoindustries.com
Do not use this equipment
before READING this
MANUAL and
UNDERSTANDING its
contents.
These WARNINGS are
included for the health
and safety of the operator
and those in the
immediate vicinity. Failure
to read and understand
these warnings can result
in injury or death.
Electronic files include a
preface containing the
same important
information as in the
orange cover.
PREFACE
[I]
• Employers are responsible for identifying all job site hazards, educating and training all persons who will operate and
maintain these products, and ensuring that all blast operators and their assistants understand the warnings and
information contained in these instructions relating to safe and proper operation and maintenance of this equipment.
• Serious injury or death can result from failure to comply with all Occupational Safety and Health Administration
(OSHA)regulations and all manufacturer’s instructions.
• This equipment is not intended for use in any area considered hazardous per National Electric Code NFPA 70 2011,
Article 500.
• Read this document and follow all instructions before using this equipment.
OSHA regulations relating to abrasive blasting are contained in the Code of Federal Regulations, Title 29 (29 CFR 1910 General Industry;
1915 Maritime; 1926 Construction). The most pertinent include: 1910.94 Ventilation, 1910.95 Occupational Noise Exposure, 1910.132
Personal Protective Equipment, 1910.133 Eye and Face Protection, 1910.134 Respiratory Protection, 1910.135 Head Protection,
1910.244 (b) Remote Controls. Consult www.osha.gov for complete information.
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Clemco proudly provides products for the abrasive blast
industry and is confident that industry professionals will use
their knowledge and expertise for the safe and efficient use of
these products.
The products described in this material, and the information
relating to these products, are intended for knowledgeable,
experienced users.
No representation is intended or made as to: the suitability of
the products described here for any purpose or application, or
to the efficiency, production rate, or useful life of these
products. All estimates regarding production rates or finishes
are the responsibility of the user and must be derived solely
from the user’s experience and expertise, not from information
contained in this material.
It is possible that the products described in this material may
be combined with other products by the user for purposes
determined solely by the user. No representations are
intended or made as to the suitability of or engineering
balance of or compliance with regulations or standard practice
of any such combination of products or components the user
may employ.
Abrasive blast equipment is only one component of an
abrasive blasting job. Other products, such as air
compressors, air filters and receivers, abrasives, scaffolding,
hydraulic work platforms or booms, equipment for lighting,
painting, ventilating, dehumidifying, parts handling, or
specialized respirators or other equipment, even if offered by
Clemco, may have been manufactured or supplied by others.
The information Clemco provides is intended to support the
products Clemco manufactures. Users must contact each
manufacturer and supplier of products used in the blast job for
warnings, information, training, and instruction relating to the
proper and safe use of their equipment.
GENERAL INSTRUCTIONS
This material describes some, but not all, of the major
requirements for safe and productive use of blast machines,
remote controls, respirator systems, and related accessories.
All equipment and accessories must be installed, tested,
operated and maintained only by trained, knowledgeable,
experienced users.
The blast operator and all workers in the vicinity must be
properly protected from all job site hazards including those
hazards generated by blasting.
Work environments involving abrasive blasting present
numerous hazards. Hazards relate to the blast process from
many sources that include, but are not limited to, dust
generated by blasting or from material present on the surface
being blasted. The hazards from toxic materials may include,
but are not limited to, silica, cyanide, arsenic, or other toxins
in the abrasives or in the coatings, such as lead or heavy
metals. Other hazards from toxins include, but are not limited
to, fumes from coating application, carbon monoxide from
engine exhaust, contaminated water, chemicals or asbestos.
In addition, physical hazards that may be present include, but
are not limited to, uneven work surfaces, poor visibility,
excessive noise, and electricity. Employers must identify all
job site hazards and protect workers in accordance with
OSHA regulations.
Never modify Clemco equipment or components or
substitute parts from other manufacturers for any Clemco
components or parts. Any unauthorized modification or
substitution of supplied-air respirator parts violates OSHA
regulations and voids the NIOSH approval.
IMPORTANT
Contact Clemco for free booklets:
Blast Off 2 – Guide to Safe, Productive, and Efficient Abrasive
Blasting, and Abrasive Blasting Safety Practices – Guide to Safe
Abrasive Blasting.
Clemco Industries Corp. One Cable Car Drive Washington MO 63090
Tel: 636 239-4300 — Fax: 800 726-7559
Website: www.clemcoindustries.com
PREFACE
[II]
OPERATIONAL INSTRUCTIONS
OPERATOR SAFETY EQUIPMENT
OSHA regulation 1910.134 requires appropriate respiratory protection for blast operators and workers in
the vicinity of blasting. These workers must wear properly-fitted, properly-maintained, NIOSH-approved,
respiratory protection that is suitable for the job site hazards. Blast respirators are to be worn only in
atmospheres not immediately dangerous to life or health from which wearers can escape without use of
the respirator.
The employer must develop and implement a written respiratory protection program with required
worksite- specific procedures and elements for required respirator use. The employer must provide
effective training to employees who are required to use respirators. The training must be comprehensive,
understandable, and recur annually, and more often if necessary.
NEVER use abrasives containing more than one percent crystalline silica. Fatal diseases, such as silicosis,
asbestosis, lead or other poisoning, can result from inhalation of toxic dusts, which include, but are not
limited to, crystalline silica, asbestos, and lead paint. Refer to NIOSH Alert 92-102; and OSHA CPL 03-00-007:
“National Emphasis Program – Crystalline Silica”, in which OSHA describes policies and procedures for
implementing a national emphasis program to identify and reduce or eliminate health hazards from exposure
to crystalline silica. Numerous topics associated with the hazards of crystalline silica in silica blasting sand
can be found on http:// osha.gov/. Clemco urges users of silica blasting sand to visit this website, and read
and heed the information it contains.
Always make sure the breathing air supply (respirator hose) is not connected to plant lines that supply
gases that include, but are not limited to, oxygen, nitrogen, acetylene, or other non-breathable gas. Never
modify or change respirator air line connections without first testing the content of the line for safe
breathing air. Failure to test the line may result in death to the respirator user.
• Breathing air quality must be at least GradeD,
as defined by the Compressed Gas Association
specification G-7.1, per OSHA Regulation 29 CFR
1910.134. When compressed air is the breathingair
source, a Clemco CPF (suitable sorbent bed filter)
should be used. Respirator hose connecting the
respirator to the filter must be NIOSH approved.
Non- approvedhose can cause illness from
chemicals employed to manufacture the hose.
• All workers must always wear NIOSH-approved
respirators when any dust is present. Exposure to
dust can occur when handling or loading abrasive,
blasting, cleaning up abrasive, or working in the
vicinity of blasting. Before removing the respirator,
test the air with a monitoring device to ensure it is
safe to breathe.
• Clemco respirators DO NOT removeor protect against
carbon monoxide or any other toxic gas. Monitoring
devices must be used in conjunction with the respirator to
ensure safe breathingair. Always locate compressors and
ambient air pumps where contaminatedair will not enter
the air intake.
• Always use Clemco lenses with Clemco respirators;
installing non-approvedlenses voids the NIOSH approval.
Respirator lenses aredesigned to protect the wearerfrom
rebounding abrasive; they do not protect against flying
objects, heavyhigh-speed materials, glare,liquids, or
radiation.
INDUSTRY ORGANIZATIONS
For additional information, consult:
Occupational Safety and Health Administration (OSHA) - www.osha.gov
Compressed Gas Association (CGA) - www.cganet.com
TheSociety for Protective Coatings (SSPC) - www.sspc.org
National Association of Corrosion Engineers (NACE) - www.nace.org
American Society for Testing and Materials (ASTM) - www.astm.org
National Institute of Occupational Safety and Health (NIOSH) - www.niosh.gov
American National Standards Institute (ANSI) - www.ansi.org
PREFACE
[III]
BLAST MACHINES AND REMOTE CONTROLS
OSHA regulation 1910.169 describes the necessity of pressure relief valves on compressed air equipment. Do not
operate blast machines with air compressors that are not equipped with properly functioning pressure relief valves.
OSHA regulation 1910.244(b) requires the use of remote controls on blast machines.
Serious injury or death can result from many sources, among them:
Involuntary activation of the remote controls. Never modify or substitute remote control parts; parts are not
compatible among different manufacturers. Welding hose is not suitable for remote control hose. Its ID and material
composition make it unsafe for remote control use.
Exceeding the maximum working pressure. Clemco blast machines are built to ASME-code and carry a ‘U’ or ‘UM’
stamp, and National Board/serial number. Every machine is marked with its maximum working pressure. Never
exceed the maximum working pressure limits of the blast machine.
Uncontrolled blast stream. High-velocity abrasive particles will inflict serious injury. Always point the blast nozzle
in the direction of the blast surface only. Keep unprotected workers out of the blast area.
Welding on the blast machine. Never weld on the blast machine; welding voids the National Board approval and
may affect the dimensional integrity of the vessel.
Moving the blast machine. Never manually move a blast machine containing abrasive, any machine containing
abrasive must be moved with appropriate mechanical lifting equipment.
HOSES, COUPLINGS, AND NOZZLE HOLDERS
The inside diameter (ID) of air hoses, fittings, and connections
should be at least four times larger than the nozzle orifice size. Blast
hose ID should be three to four times the size of the nozzle orifice.
Example: a #6 nozzle (3/8” diameter orifice) calls for 1-1/2” ID blast
hose and 1-1/2” ID or larger compressor hose. All hose runs should be
kept as short as possible and run in as straight a line as possible to
reduce pressure loss.
To install, squarely cut the end of the hose so that it fits snugly
against the coupling or hose end shoulder. Always use the screws
recommended by the manufacturer ensuring that they do not
penetrate the inner wall. Make sure the couplings tightly fit the hose.
Install cotter pins at every connection or use couplings with built-in
lock-springs to prevent disengagement. Install safety cables at all
connections to prevent whipping if hoses disengage or blow out.
MAINTENANCE AND REPAIR
Completelyreadand follow all service instructions and recommended maintenance intervals. Always shut off compressor and
depressurize blast machine beforeperforming any maintenance. At everyservice interval, cleanall filters, screens, and alarm systems. If
spring-loaded abrasive valves areused, always cage spring beforedisassembly.
WARRANTY
The following is in lieu of all warranties, express, implied or statutory, and in no event shall seller or its agents, successors, nominees or
assignees, or either, be liable for special or consequential damage arising out of a breach of warranty. This warranty does not apply to any damage or
defect resulting from negligent or improper assembly or use of any item by the buyer or its agent or from alteration or attempted repair by any person
other than an authorized agent of seller. All used, repaired, modified, or altered items are purchased “as is” and with all faults. In no event shall seller
be liable for consequential or incidental damages. The sole and exclusive remedy of buyer for breach of warranty by seller shall be repair or
replacement of defective parts or, at seller’s option, refund of purchase price, as set forth below
:
1. Seller makes no warranty with respect to products used other than
in accordance hereunder.
2. On products seller manufactures, seller warrants that all products areto
be freefrom defects in workmanship and materials for a
period of one yearfrom dateof shipment to buyer, but no warranty is
madethat the products arefit for a particular purpose.
3. On products which seller buys and resells pursuant to this order, seller
warrants that the products shall carry the then standard warranties of the
manufacturers thereof,a copy of which shall be madeavailable to the
customer upon request.
4. Theuse of any sample or model in connection with this order is for
illustrative purposes only and is not to be construed as a warranty that the
product will conform to the sample or model.
5. Seller makes no warranty that the products aredelivered freeof the
rightful claim of any third party by way of patentinfringement or the like.
6. This warranty is conditioned upon seller’s receipt within ten (10)
days afterbuyer’s discovery of a defect,of a written notice stating in
what specific material respects the product failed to meetthis
warranty. If such notice is timely given, seller will, at its option, either
modify the product or part to correct the defect,replacethe product or
part with complying products or parts, or refund the amount paid for
the defectiveproduct, any one of which will constitute the sole liability
of the seller and a full settlement of all claims. No allowance will be
madefor alterations or repairs made by other than those authorized
by seller without prior written consent of seller. Buyershall afford
seller prompt and reasonable opportunity to inspect the products for
which any claim is madeas abovestated.
Except as expressly set forth above,all warranties, express, implied
or statutory, including implied warranty of merchantability, are
herebydisclaimed.
PREFACE
[IV]
DAILYSET‐UPCHECKLIST
Make sure all blast operators are properly trained and suitably attired with a blast suit, safety boots, leather gloves, respiratory and hearing protection. Every day before start up,
check all equipment components, including piping, fittings, and hoses, and valves, for leaks, tightness, and wear. Repair or replace as needed. Use the following checklist.
1. PROPERLY-MAINTAINED AIR COMPRESSOR
sized to provide
sufficient volume (cfm) at given pressure for nozzle and other tools. ADD 50%
volume (cfm) reserve to allow for nozzle wear. Use large compressor outlet and
air hose (at least 4 times the nozzle orifice diameter). For oil-lubricated
compressors, the employer shall use a high- temperature or carbon monoxide
alarm, or both, to monitor carbon monoxide levels. If only high-temperature
alarms are used, the air supply shall be monitored at intervals sufficient to
prevent carbon monoxide in the breathing air from exceeding 10 ppm. Follow
the manufacturer’s checklist and maintenance instructions.
2. BREATHING-AIR COMPRESSOR
(or oil-less ambient air pump)
capable of providing Grade D quality air, located in a dust free area. Read # 1
above.
3. CLEAN, PROPERLY-MAINTAINED NIOSH-APPROVED SUPPLIED-AIR
RESPIRATOR
worn by blast operators, and other workers exposed to blast dust.
Make sure all respirator components are in place — all lenses, inner collar, and
cape. Thoroughly inspect all components for wear. The NIOSH approval (approval
number is listed in the owner’s manual) is for a complete assembly from point of
attachment on the CPF (sorbent bed) filter to the complete respirator. Substitution of
any part voids the NIOSH approval.
4. CARBON MONOXIDE MONITOR/ALARM
installed at the CPF filter or
inside the supplied-air respirator for monitoring for the presence of deadly CO gas
and warning the operator(s) when the CO level reaches an unacceptable level.
When an ambient air pump is used for breathing air, a CO monitor provides a
measure of safety. Read # 1 above.
5. BREATHING-AIR FILTER (OSHA-REQUIRED
sorbent bed filter) for
removal of moisture and particulate matter in the compressed air breathing-air
supply. Monitor the condition of the cartridge and replace when odor is detected or
at 3 month intervals, whichever comes sooner. The breathing air filter does NOT
detect or remove carbon monoxide (CO). Always install a CO monitor/alarm.
6. BLAST MACHINE
(bearing U or UM stamp, National Board Number, and
Maximum Working Pressure) sized to hold a 30-minute abrasive supply. Examine
pop-up valve for alignment. Check piping, fittings, screens, valves for tightness,
leaks, and wear. Always ground the machine to eliminate hazard of static shock.
Install a blast machine screen to keep out foreign objects. Use a blast machine
cover if left outdoors overnight. Never exceed the maximum working pressure of the
vessel.
7. AIR LINE FILTER
(moisture separator) installed as close as possible to the
blast machine inlet and sized to match the size of the inlet piping or larger air supply
line. Clean filter and drain often. Damp abrasive causes operational problems.
8. REMOTE CONTROLS
are required by OSHA and must be in perfect
operating condition. Test and check all components to ensure all parts are present
and fully functional. Use genuine replacement parts. NEVER mix parts from different
manufacturers. Never use welding hose for remote control hose.
9. BLAST HOSE
should have an inside diameter sized to suit the blast nozzle.
The ID should be three to four times the size of the nozzle orifice diameter. Blast hose
should be arranged in as straight a line as possible from the blast machine to the
work area, avoiding sharp bends.
10. COUPLINGS AND NOZZLE HOLDERS
should fit snugly on the hose and
be installed with manufacturer recommended screws. Coupling lugs must snap firmly
into locking position. Gasket must always be used to form a positive seal, and cotter
pins must be installed. Replace gasket when wear, softness or distortion is detected.
Check nozzle holder for thread wear; replace at any sign of wear. Install safety cables
at all connections.
11. NOZZLE
orifice size should be checked and nozzle replaced when worn
1/16” from original size. (No. 5 nozzle has 5/16” orifice diameter; replace when it
measures 3/8”). Threads should be inspected daily for wear and nozzle should be
replaced when wear is detected. Always use a nozzle washer.
12. ABRASIVE
must be a material specifically manufactured for blasting. It
should be properly sized for the job. Check material safety data sheet for free-
silica, cyanide, arsenic, lead and other toxins and avoid use when these toxic,
harmful substances are present.
SURFACE TO BE BLASTED
should be examined for hazardous substances.
Take appropriate protective measures as required by OSHA to ensure the blast
operator, other workers in the vicinity, and any bystanders are properly protected.
©Clemco Industries Corp., Stock No. 20954P, 0692 Rev. F, 06/12
1. Air Com
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7. Air Line
Moisture
Se
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5. CPF Air Filte
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6. ASME Code
Bl
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ac
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8. Remote
Co
ntr
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s
9. Blast Hose 10. Hose Couplings and Safety Cables
11. Appropriately Sized Nozzle
12. Abrasive
4. External or
Helmet Mounted
Carbon Monoxide
Monitor /Alarm
2. Breathing Air Compressor for
High Pressure Respirators3. NIOSH Approved
Supplied-Air Respirator
or Ambient Air Pump for
Low Pressure Respirators
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 1
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
1.0 INTRODUCTION
1.1 Scope of Manual
1.1.1 These instructions cover the setup, operation,
maintenance, troubleshooting, and replacement
parts for the following Clemco MB Series Vacuum
Systems:
MB-750 MB-1600 MB-2000
MB-3000 MB-4000 MB-5000
Supplemental operations manuals are provided for the
positive displacement blower (vacuum pump and
blower motor).
1.1.2 These instructions contain important safety
information. All operators and personnel involved with
the abrasive vacuum process must read and understand
the contents of these instructions, including
supplemental operations manuals and the blasting-
related orange safety cover. It is equally important that
the operator is trained and qualified to safely operate the
system and all other equipment used with the vacuum
recovery process and blast machine.
1.1.3 All personnel involved with the abrasive
recovery or blasting process must be made aware of
the hazards associated with handling spent abrasive
and abrasive blasting. The Clemco booklet Abrasive
Blasting Safety Practices is included with every blast
machine and contains important safety information
about abrasive blasting that may not be included in
equipment operations manuals. To order additional
copies, visit www.clemcoindustries.com or email
info@clemcoindustries.com.
1.2 Safety Alerts
1.2.1 Clemco uses safety alert signal words, based
on ANSI Z535.4-2011, to alert the user of a potentially
hazardous situation that may be encountered while
operating this equipment. ANSI's definitions of the
signal words are as follows:
This is the safety alert symbol. It is
used to alert you to potential physical
injury hazards. Obey all safety
messages that follow this symbol to
avoid possible injury or death.
Notice indicates information that is
considered important, but not hazard-related,
if not avoided, could result in property
damage.
Caution indicates a hazardous situation that, if
not avoided, could result in minor or moderate
injury.
Warning indicates a hazardous situation that,
if not avoided, could result in death or serious
injury.
Danger indicates a hazardous situation that, if
not avoided, will result in death or serious
injury.
1.3 Table of Contents
SUBJECT SECTION LOCATION
INTRODUCTION ..................................................... 1.0
Scope of Manual ...................................................... 1.1
Safety Alerts ............................................................ 1.2
Table of Contents .................................................... 1.3
Components ............................................................ 1.4
Theory of Operation ................................................. 1.5
System Components and Function ......................... 1.6
SETUP ..................................................................... 2.0
Placement ................................................................ 2.1
Suction Hose Connections ....................................... 2.2
Connect Suction Nozzle to Recovery Hose ............. 2.3
Electrical Requirements and Connections .............. 2.4
Ground Each System Components ......................... 2.5
Compressed-Air Requirements and Connections ... 2.6
Place Abrasive and/or Waste Containers ................ 2.7
ACCESSORIES ....................................................... 3.0
Multiple Vacuum-Hose Manifolds ............................ 3.1
Vacuum Tools for Dust Removal ............................. 3.2
INITIAL STARTUP .................................................. 4.0
Blower (vacuum pump) Inspection .......................... 4.1
Perform Routine Startup Instructions ...................... 4.2
PERSONAL PROTECTIVE EQUIPMENT .............. 5.0
Who Is Required to Wear Protective Clothing ......... 5.1
Donning (putting on) Protective Clothing ................. 5.2
Doffing (taking off) Protective Clothing .................... 5.3
OPERATION ........................................................... 6.0
Startup ..................................................................... 6.1
Operation ................................................................. 6.2
Shutdown ................................................................. 6.3
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 2
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
Adjustment ............................................................. 7.0
Pulse Intervals ......................................................... 7.1
Suction Nozzle ......................................................... 7.2
Pulse Pressure ......................................................... 7.3
Adjusting the Vacuum Safety-Relief Valve .............. 7.4
Tensioning V-Belts .................................................... 7.5
Optional Cyclone Precleaner Legs .......................... 7.6
PREVENTIVE MAINTENANCE .............................. 8.0
General Preventive Maintenance ............................ 8.1
Inspection and Maintenance Schedule ..................... 8.2
Daily maintenance ............................................. 8.2.1
Weekly maintenance ......................................... 8.2.2
Monthly maintenance ........................................ 8.2.3
Six-month maintenance ..................................... 8.2.4
Perform Additional Dust-Collector Cartridge Pulsing .. 8.3
SERVICE MAINTENANCE ..................................... 9.0
Empty Dust-Collector and Precleaner Hoppers .......... 9.1
Empty the Recovery Storage Hopper ...................... 9.2
Inspect and Replace Filter Cartridges ..................... 9.3
Washing Filter Cartridges ........................................ 9.4
Servicing Diaphragm Pulse Valve(s) ....................... 9.5
Check Vacuum Gauge and Safety-Relief Valve ...... 9.6
Inspect and Service Backflow Gates ....................... 9.7
Replacing Gaskets on Doors and Hatches .............. 9.8
TROUBLESHOOTING .......................................... 10.0
Motor does not start when START button is pressed ... 10.1
Motor runs but recovery rate is low ........................ 10.2
Red lamp marked FAULT flashes ......................... 10.3
Vacuum pump momentarily reverses at shutdown ... 10.4
ACCESSORIES and REPLACEMENT PARTS .... 11.0
Accessories and Options ....................................... 11.1
Motor Compartments ............................................. 11.2
Dust Collectors ....................................................... 11.3
Recovery Storage Hopper ..................................... 11.4
Precleaners ............................................................ 11.5
1.4 Components – Figure 1
1.4.1 The primary components of the vacuum
system are shown in Figure 1. The system includes the
suction unit, recovery storage hopper, recovery suction
hose, suction nozzle, and interconnecting hose(s). Models
used to recover spent, friable abrasive should also include
an optional cyclone precleaner.
1.4.2 Suction unit
The suction unit is the vacuum source for the recovery
system. It includes the following:
An automatically sequenced reverse-pulse dust
collector with a cyclone dust container.
Acoustic-lined motor compartment containing an
electric drive motor, positive displacement blower
(vacuum pump), vacuum safety-relief valve, and
exhaust silencer.
Electric control panel with 24-volt DC controls.
The module is equipped with access doors, forklift
pockets, lifting eyes, and a vacuum gauge, which
monitors vacuum (negative pressure) at the module.
1.4.3 Recovery storage hopper
The storage hopper is the collection point for recovered
abrasive. It includes:
The storage hopper with bolt-on leg extensions.
An inlet connection for the recovery hose, and an
outlet connections and the interconnecting hose.
A top access hatch with deflector wear-plate and
replaceable rubber pad.
A hopper with a centrally located manually
operated butterfly valve and four secondary ports
for emptying stored abrasive into disposal
containers or blast machines.
Figure 1
Suction Nozzle
Recovery Suction Hose
Interconnecting Hose
Interconnecting Hose
RECOVERY
STORAGE HOPPER
OPTIONAL
CYCLONE
PRECLEANER
Not required when
recovering steel.
SUCTION UNIT
MB-3000 Shown
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 3
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
1.4.4 Optional cyclone precleaner
The optional precleaner is required when vacuuming
slags, minerals or other spent, expendable abrasives.
It is placed between the recovery storage hopper and
suction module to remove fines and some dust particles,
which prevents rapid filling of the dust collector.
1.4.5 Suction nozzle (bulk vacuum tool) and
accessory vacuum tools
The suction nozzle attaches to the end of the
recovery hose and is used to pick up bulk
abrasive from the recovery site.
2” Vacuum Tool: When dust-free cleaning is
required from surface areas, obtain vacuum tools
from a local vendor. A manifold and 2” suction
hoses are required to adapt the recovery hose to
a 2” vacuum tool. Manifolds are listed in Section
11.1: Optional Accessories.
1.5 Theory of Operation – Figure 2
1.5.1 The following description of the system’s
operation begins at the recovery site where spent
abrasive is vacuumed, and ends at the suction module
(the vacuum source) where clean, filtered air is
discharged into the atmosphere. Review the process
before operating the system.
1.5.2 The system operates under a partial vacuum
(negative pressure) and is designed to recover spent
abrasives from the blast area into a storage hopper.
Recyclable abrasives can be returned to the blast
machine for reuse. Spent expendable abrasives are
emptied into waste containers for disposal.
1.5.3 When the system is set up, power is provided to the
control panel, and compressed air supplied to the reverse-
pulse dust collector, the system is ready for operation by
pushing the START button on the face of the control panel.
1.5.4 Pushing the white START button starts the
electric motor, which drives the vacuum pump. The
pump is the vacuum source for the recovery system.
The vacuum circuit is sealed under negative pressure
between the vacuum pump and suction nozzle, where
it is used to vacuum spent abrasive.
1.5.5 During operation spent abrasive is vacuumed
into the suction nozzle and conveyed through the
recovery hose and delivered into the recovery storage
hopper. Larger and heavier abrasive particles fall out of
the vacuum circuit and stored in the hopper. The lighter
fines and dust remain suspended and are drawing into
the next system component.
1.5.6 The vacuum flow continues from the storage
hopper through the first interconnecting hose. When
recovering expendable slags and similar abrasives, the
next component is the cyclone precleaner, where the
first stage cleaning of fines and heavy dust takes
place.
1.5.7 The vacuum flow continues from the
precleaner through the second interconnecting hose
and enters the dust collector for the final cleaning. Dust
particulates are trapped on the outer surface of high-
performance polyester filter cartridge(s), allowing only
filtered air to exit the dust collector and enter the
vacuum pump before being exhausted through a
silencer and into the atmosphere.
1.6 System Components and Functions – Figure 3
1.6.1 Suction nozzle
1.6.1.1 Optimum recovery rates are obtained by
maintaining a constant balance of abrasive and
vacuum air flow. Keeping the end of the suction nozzle
immerged in spent abrasive and regulating air
induction at the nozzle maintains constant air flow and
Figure 2
Spent Abrasive
Abrasive, Fines,
Dust, and Air
Quieter, clean, filtered
air to atmosphere.
Recovered Abrasive
Dust and Air
Dust for Disposal
F
i
nes
fo
r
Disposal
Fines, Dust and Air
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 4
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
Figure 3
prevents abrasive saturation and blockage within the
recovery hose. It is difficult to keep a steady flow of
material and air when vacuuming without the suction
nozzle. Optimum recovery rates are attained by use of
a properly adjusted suction nozzle. Refer to Section
7.2 to adjust the nozzle.
1.6.2 Recovery hose
1.6.2.1 The recovery process vacuums spent
abrasive, which contains abrasive, fines, and dust,
from the recovery site, through the recovery hose, to
the storage hopper inlet. Keep the recovery hose as
short as possible and with as few bends as possible.
1.6.3 Recovery storage hopper
1.6.3.1 Heavier, coarser recovered abrasive is stored
in the hopper while lighter fines and dust that are
churned up and airborne are carried through the
interconnecting hose to the next segment. If the
abrasive is recyclable, it can be reused by placing a
blast machine under the hopper’s central butterfly
valve. If the abrasive is expendable, a waste container
may be placed under the hopper’s central butterfly
valve.
1.6.3.2 When finished vacuuming or when the storage
hopper is full, shut down the system by pressing the
black stop button and empty the hopper by opening
the butterfly valve or secondary ports. The valves must
be kept fully closed and sealed while vacuuming.
Keep the butterfly valve and secondary ports
fully closed during vacuuming. A minor leak at
the valves will cause considerable wear around
the leak point and reduce performance.
1.6.4 Interconnecting hose(s)
1.6.4.1 The vacuum flow continues from the storage
hopper through the interconnecting hose. Fines and
dust are taken from the storage hopper and transferred to
the dust collector, or, if expendable spent abrasive is
vacuumed, to the cyclone precleaner. Interconnecting
hoses are attached to the system components inlets with
flanged couplers and slipped over the component outlets.
1.6.5 Optional cyclone precleaner
1.6.5.1 The precleaner is not needed when vacuuming
steel abrasive. It is required when vacuuming slags,
minerals or other spent, expendable abrasives that contain
high levels of broken abrasive and fines. The precleaner
removes fines and prevents rapid filling of the dust
collector and prolongs the life of the filter cartridge(s).
1.6.5.2 When finished vacuuming or before the
precleaner is full, shut down the system and open the
butterfly valve to empty the contents into a suitable
disposal container. All butterfly valves must be kept
fully closed while vacuuming.
1.6.6 Dust collector (Mounted on the suction unit
outside the motor compartment.)
1.6.6.1 The dust collector is a cyclonic, automatically
sequenced, reverse-pulse dust collector.
1.6.6.2 As the vacuum flow passes through the dust
collector, most of the dust is removed by the cyclonic
action of the collector; remaining dust collects on the
outer surface of the filter cartridge(s). Cartridge
cleaning is performed by jet pulses of compressed air.
For this purpose, the unit must be supplied with clean,
dry compressed air with a maximum of 85 psi. Higher
pressure does not clean cartridges better and reduces
cartridge life. Optimum pressure is between 75 and 80
psi. Refer to Section 7.3 to adjust pulse pressure.
Hose Connection - Precleaner Inlet
Hose Connection, Inlet Flange
Optional Level-Sensor Port
Butterfly Dump-Out Valve
Dust Collector
Suction Unit
Butterfly Dump-Out Valve
Access Hatch
Spent A
b
rasive
Hose Connection - Hopper Outlet
Hose Connection - Precleaner Outlet
Hose Connection - Dust-Collector Inlet
Control Panel
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 5
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
1.6.6.3 Filter cartridges are cleaned at one-minute
intervals by a jet pulse of compressed air. The jet pulse
momentarily reverses air flow through the cartridges,
removing dust that has accumulated on the outer
surface. When the unit is stopped, the pulse-jet
cleaning continues for 10 minutes.
NOTE: The pulse intervals can be changed if needed.
Different configurations are built into the programable logic
controller (PLC). Contact Clemco if adjustment is needed.
1.6.6.4 A dust compartment is mounted at the bottom
of the filter section. The bottom is fitted with a butterfly
valve for discharge of dust to a waste bag or bucket
(not included). The dust-collector butterfly valve
includes a switch, which is connected to the control
panel. If the valve is open, the yellow indicator light
flashes and prevents operation. Empty the dust
compartment frequently and at regular intervals.
Vacuuming materials with high dust concentration will
require emptying the compartment frequently. It is
essential that dust does not overfill the dust
compartment and enter the filter area.
Empty the collector as often as necessary to
keep dust level below the filter section. High
dust level will reduce efficiency, damage the
filter cartridge, decrease filter life, and elevate
vacuum pressure leading to overheating,
which could damage the vacuum pump.
1.6.6.5 The dust-collector pulse mechanism is an
integral part of the collector.
1.6.6.6 After dust is trapped on the filter cartridge(s)
within the dust collector, the vacuum air flow (air
cleaned by the dust collector) is drawn into the vacuum
pump located within the motor compartment.
1.6.7 Motor compartment
1.6.7.1 The acoustically lined motor compartment
houses the electric drive motor, vacuum pump, and
related accessories, and electric control panel. The
motor drives the vacuum pump using a series of V-
belts. The pump creates the negative pressure
(vacuum) that pulls air through the system. The
vacuum that draws air in at the suction nozzle is
created at the vacuum pump.
1.6.7.2 A vacuum safety-relief valve is located on the
inlet side of the vacuum pump. The purpose of the
relief valve is to prevent the vacuum pump from
overheating. The valve is under negative pressure, and
it opens when pressure increases due to a blockage in
the vacuum-air-flow circuit. Blockages cause the negative
pressure to increase, which can overheat the vacuum
pump, and if allowed to continue, will damage the pump
and motor. As negative pressure builds due to a
blockage, the vacuum relief opens to allow air in,
decrease pressure, and cool the pump.
1.6.7.3 The vacuum relief valve is factory set, but it
should be periodically checked and adjusted per
Section 7.4.
1.6.7.4 The outlet side of the vacuum pump pushes
cleaned air through the silencer mounted on top of the
compartment, discharging clean air to the environment.
1.6.8 Butterfly dump-out valves – Figure 4
Air drawn into a partially open or leaking
butterfly valve will cause considerable
damage to the bottom outlet. To avoid rapid
and unnecessary wear, butterfly valves must
be fully closed during operation.
1.6.8.1 The Butterfly valve on the dust collector
(suction unit) includes a gear wheel to open and close
the valve and a switch, which is connected to the control
panel, so the unit cannot run if the butterfly valve is not
completely closed, and causes the yellow indicator light
to flash. Butterfly valves on the recovery storage hopper
(and cyclone precleaner when added) include only the
gear wheel but no switch, and is not connected to the
control panel. Make sure all butterfly valves are
completely closed during operation; an open or
leaking butterfly valve will cause considerable
damage to the bottom outlet. It takes approximate 10
to 11 turn to fully open and close the valve.
Butterfly Dump-Out Valve
Turn wheel clockwise (to the right) to close.
Turn wheel counterclockwise (to the left) to open.
Figure 4
1.6.9 Vacuum gauge
1.6.9.1 The gauge shows the negative operating
pressure, in bar and inches of mercury (Hg), at the
suction module. It is useful to monitor vacuum
pressure and to adjust the vacuum relief valve.
Close
Open
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 6
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
1.6.9.2 The optimum vacuum while transferring
abrasive is between -0.3 to -0.4 bar/9" and 12" Hg.
Constant higher vacuum is an indication of blockage in
the hose, which can be due to insufficient air induction
at the suction nozzle.
Press the stop button to shut down the
system if the vacuum exceeds -0.5 bar/14.5"
Hg. Continuing operation when vacuum is
above -0.5 bar/14.5" Hg will overheat the
vacuum pump causing extensive damage, and
void the warranty.
1.6.10 Electric control-panel function and controls
1.6.10.1 The panel houses all the controls, which
include 24-volt DC controls, soft start, PLC controls,
dust-collector controls, and butterfly-valve control on
the suction unit.
1.6.10.2 The door panel includes a keyed door locks,
lockable main breaker, operation buttons, and function
lights.
1.6.10.3 Typical operation buttons and function lights
included on a panel are:
START Button: Pushing the white START Button
starts the vacuum system motor and all controls.
STOP Button: Pushing the black STOP Button
stops the vacuum system. The automatic pulse-
cleaning cycle continues for 10 minutes after
pushing the button.
POWER Indicator Light: The white indicator
lights up when the main breaker is turned ON.
ON Indicator Light: The green lamp lights up
during operation and flashes for 10 minute after
system is shut off, indicating the automatic pulse-
cleaning cycle is in operation.
FAULT Indicator Light
If the red indicator flashes on the initial startup, it
indicates phase-rotation is backward and the
power supply leads need to be switched.
If the indicator flashes on subsequent startups, it
indicates a motor overload. Immediately push the
STOP Button and determine the cause of the
overload. Refer to Section 10.3.
EMERGENCY STOP Button: Shuts down all
functions. Once the emergency stop button is
pressed, the button must be pulled out before the
system can be restarted.
1.6.10.4 All wiring within the module is completed.
The user needs only to supply the required power to
the panel.
2.0 SETUP
2.1 Placement
2.1.1 Using lifting eyes
Use only qualified riggers and operators when
picking and moving this equipment. Improper
rigging of the equipment can result in injury or
death.
2.1.1.1 Lifting eyes are for lifting empty system
components only. Use a spreader for uniform, vertical
lift on each lifting eye. Do not lift any component when
it contains any abrasive or dust.
Empty this equipment before lifting. The lifting
eyes will not support the weight of the
equipment if it contains abrasive or dust. If
overloaded or lifted laterally, the lifting eyes may
fail. Failure can result in serious injury or death.
NOTE: All system components must be placed on
firm, level ground, allowing full access to all doors,
connectors, and service areas, and securely
anchored.
2.1.2 Bolt the storage-hopper extension legs to the
hopper legs. NOTE: Before lifting the hopper and
bolting on the legs, review the recovery hose
flanged inlet connections in Section 2.2.2. The
recovery hose is heavy and intentionally stiff. It
may be easier to connect the hose before attaching
the legs. The disadvantage to installing the hose
first is the weight and pull of the hose can hinder
raising the hopper and maneuvering it into its final
position.
2.1.3 Place the storage hopper on firm level ground,
as close as possible to the recovery site, and within the
limits of the recovery hose while keeping the hose as
straight as possible. Position the hopper so the inlet
side of the hopper is toward the recovery site. Make
sure the recovery hose is long enough to reach
between the recovery site and hopper inlet.
2.1.4 If a cyclone precleaner is required (when
recovering spent slags or similar expendable abrasive
with high levels of fines), place it on firm level ground and
as close as possible to the storage hopper, and position it
so the tangential inlet faces toward the storage hopper
outlet. Make sure it is located so the interconnecting hose
reaches between the hopper outlet and precleaner inlet.
Adjust the sliding legs as needed, per Section 7.6.
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 7
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
2.1.5 Place the suction module so that the dust-
collector tangential inlet faces toward the storage
hopper (or precleaner) outlet and within the reach of
the interconnecting hose.
2.1.6 After the equipment is placed, the following
can be done concurrently or in any sequence.
1. Attach interconnecting hose(s).
2. Connect electrical service.
3. Connect compressed-air supply.
2.2 Suction Hose Connections
To prevent shocks from static electricity and
damage to electronic processors, use only
static conductive recovery hose and
interconnecting hoses.
Installation Notes:
Outlet connections: Interconnecting hose(s) fit
over the outlet of each unit and are held with
clamps, as noted in Section 2.2.1 and Figure 5.
Flanged inlet connections: Recovery hose and
interconnecting hoses are attached to the inlet
flanges of each unit with flanged connections, as
noted in Section 2.2.2 and Figure 6.
Connecting additional recovery hoses:
Additional recovery hoses are coupled together
using hose-extension couplings and clamps, as
shown in Section 2.2.3, Figure 8.
2.2.1 Outlet connections – Figure 5
NOTE: The precleaner connection is shown for
reference. Use the same method to connect the
hose to the recovery-hopper outlet connection.
Figure 5
2.2.1.1 Lay out the interconnecting hoses between the
hopper outlet and dust-collector inlet. The optional
cyclone precleaner fits between the storage hopper
and dust collector and requires an additional
interconnecting hose.
2.2.1.2 Place a hose clamp over one end of an
interconnecting hose, as shown in Figure 5. Note: The
hose connection shown in Figure 5 is for the optional
precleaner. Use the same method to connect the hose
to the bottom of the angled outlet connection (shown in
Figure 3) on the recovery storage hopper.
2.2.1.3 Slide the hose onto the outlet connector and
tighten the clamp screws to secure the hose.
2.2.2 Flanged inlet connections – Figure 6
2.2.2.1 Layout the recovery hose(s) from the recovery
site to the recovery storage hopper. Do not use longer
lengths of hose than required and run hose in straight
lines, avoiding unnecessary bends. Bends cause rapid
wear along the outside radius. When bends are
required, routinely rotate the hose to redirect wear
areas and prolong hose life. Never vacuum with coiled
recovery hose, which can decrease recovery rates and
accelerate hose wear.
2.2.2.2 Avoid sharp bends and tight radius that could
kink the hose and any condition that could deform the
hose and cause restrictions, elevated vacuum, and
possible damage to the vacuum pump.
The recovery hoses must be extremely rigid to
avoid collapse under high vacuum. Do not lay
the hose in traffic areas where the hose could
be run over. Damaged hose can rarely be
straightened, and it will cause high wear,
decreased recovery rates, and elevated
vacuum pressure, which could cause the
vacuum pump to overheat, causing extensive
damage and voiding the warranty.
2.2.2.3 Refer to the upper image (Step 1) in Figure 6.
Slide the hose flange and 3/8" expansion gasket onto
the end of the recovery suction hose that is closest to
the storage hopper.
Excluding:
MB-750: The recovery suction hose is attached
directly to the flanged inlet connections with clamps.
6" diameter interconnecting hoses: A flanged inlet
pipe is not used to connect 6" ID hose. Instead, the 6"
hose is inserted directly into the inlet flange, which has
a hose stop to prevent the hose from being inserted
too far. The hose flange with an expansion gasket
bolts directly onto the flanged inlet.
Outlet Connection
Hose Clamp
Interconnecting Hose
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 8
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
* Flanged inlet pipes are used with 3", 4", and 5" flanged
Inlet connections. Six-inch hose is inserted into the inlet
flange, and the hose flange with the gasket are bolted
directly onto the inlet flange.
Figure 6
2.2.2.4 Refer to the middle image (Step 2) in Figure 6.
Slide the flanged inlet pipe onto the hose until the hose
reaches the stop at the end of the pipe.
2.2.2.5 Place a bolt and washer through mounting
holes in the hose flange, expansion gasket, and inlet
pipe to keep them aligned.
2.2.2.6 Refer to the lower image (Step 3) in Figure 6.
Place the flange gasket over the inlet pipe and
alignment bolt and insert the inlet pipe and hose
assembly into the inlet flange. Hold the hose assembly in
place while tightening all mounting nuts. Once tightened,
the expansion gasket spreads and grips the hose.
2.2.2.7 Repeat the process to connect the
interconnecting hose to the dust-collector inlet, and to
the precleaner inlet when a precleaner is used.
2.2.3 Connect additional lengths of recovery hose
2.2.3.1 The table in Figure 7 shows hose information for
all models; it shows hose diameter, hose length(s)
supplied with each system, maximum conveying
distance, minimum and maximum lengths of individual
hoses, and hose and coupler stock numbers. Hose-
extension couplings and clamps are not included with
the system; they must be ordered separately when
required.
2.2.3,2 When more than the standard 65 ft of recovery
hose is needed, a hose-extension coupling and two
clamps are required to join each additional length of
hose. Slide a hose clamp over one end of one of the
recovery hoses and push the hose onto the coupling
as close to the stop as possible, as shown in Figure 8.
Repeat the process for the additional hose and tighten
the clamps to secure the hoses to the coupling.
MODEL
MB-
750 E4
MB-
1600 E5
MB-
2000 E5
MB-
3000 E5
MB-
4000 E5
MB-
5000 E5
Recover
y
H
os
e Diameter
3
"
4
"
5
"
5
"
6
"
6
"
Inter
c
on
n
ecti
n
g
Hose
D
iam
eter
3
"
5
"
5
"
6
-
In
6
-
In
6
-
In
Le
ngth Suppl
ied
65
f
t
65
f
t
65
f
t
65
f
t
65
f
t
65
f
t
Max
Recovery
Dist.
100
f
t
240
f
t
490
f
t
82
0
f
t
10
0
0
f
t
1300
f
t
Min
Single
Len
gt
h
*
25
f
t
*
*25
f
t
*
25
f
t
*25
f
t
*25
f
t
*25
f
t
Max Sing
le L
ength
*
65
f
t
*
6
5
f
t
*
6
5
f
t
*
65
f
t
*
65
f
t
*
65
f
t
Recovery Hose Stock No. **30746 (3") **30747 (4")
*
*
30748
(5
"
)
**30748 (5") **30748 (5")
**
307
4
9
(
6
"
)
**30749 (6") **30749 (6")
Hose
-
E
xtensio
n
Coupl
in
g
30
736
30737
30
738
30738
30739
30739
Hose Clamps 30728 (3") 30729 (4")
307
3
0
(
5
"
)
30730 (5") 30730 (5")
30
7
3
1
(
6
"
)
30731 (6") 30731 (6")
* Hose is sold in 65 ft increments.
** Stock numbers are for bulk hose of 65 ft.
NOTE: Each additional section of recovery hose requires one hose-extension coupling and two clamps. Recovery
hoses, couplings, and clamps are listed in Section 11.1: Accessories.
Figure 7
End of suction hose.
Hose Flange
3/8" Expansion Gasket
Inlet Flange
Flange Gasket
3/8" Expansion Gasket
Recessed into the flange.
Secure the hose
assembly
with fasteners provided.
Slide inlet pipe onto the hose.
* Flanged Inlet Pipe
3/8" Expansion Gasket
Alignment Bolt
Step 1
Step 2
Step 3
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 9
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
Figure 8
2.3 Connect Suction Nozzle to Recovery Hose
Figure 9
2.3.1 Slide the hose clamp provided over the end of
the recovery hose closest to the recovery site. Insert
the suction-nozzle end about halfway into the hose
and secure the nozzle to the hose using the clamp
provided. Adjust the nozzle per Section 7.2.
Figure 9
2.3.2 Avoid using a hose without a nozzle to vacuum.
Doing so can cause frequent blockage, resulting in
high vacuum and decreased recovery rates.
2.4 Electrical Requirements and Connections
Lockout and tagout the electrical supply
before performing any electrical service.
Shorting electrical components could result in
serious electrical shocks, death, or equipment
damage. All electrical work, or any work done
inside an electrical panel, must be performed
by qualified electricians and comply with
applicable codes.
2.4.1 An electrical control panel is mounted on the
suction module and a wiring diagram is enclosed within
the panel. Voltage requirement is determined at the
time of order. All module wiring is completed; the user
needs only to supply appropriate 3-PH power to the
panel. A wiring schematic showing voltage is stowed in
the control panel.
2.4.2 The table in Figure 10 shows nominal full-load
amps based on motor voltage. All electrical work must
be done by qualified electricians and comply with
applicable codes.
2.4.3 Pass an electrical supply cable through the
entry at the base of the control panel and make
electrical connection per the wiring diagram stowed
inside the panel. Make sure grounding is to an earth
ground. A cable clamp is provided on larger models;
secure the supply cable with the clamp.
ELECTRICAL REQUIREMENTS
MB-750
Motor Size
15 kW/20 HP
MB-1600
Motor Size
30 kW/40 HP
MB-2000
Motor Size
45 kW/60 HP
MB-3000
Motor Size
75 kW/100 HP
* MB-4000
Motor Sizes
90 kW/125 HP
MB-5000
Motor Size
110 kW/150 HP
NOMINAL FLA
230 VAC/60 Hz
460 VAC/60 Hz
575 VAC/60 Hz
54
27
22
104
52
41
154
77
62
248
124
99
312
156
125
360
180
144
Disconnect/Fuses
230 VAC
460 VAC
575 VAC
80 A
45 A
30 A
150 A
70 A
60 A
200 A
100 A
80 A
350 A
175 A
125 A
400 A
200 A
175 A
500 A
250 A
200 A
Amps shown are based on 2-pole motors.
* MB-4000 utilizes two suction units, each with its own motor. Amps shown is the sum of both motors.
Figure 10
Recovery Hose – Install
as
close to the stop as possible.
Hose-Extension Coupling
Hose Stop
Additional Recovery Hose
Hose Clamp
Suction Nozzle
Recovery Hose
Hose Clamp
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 10
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
2.4.4 Test electrical functions
2.4.4.1 Turn the main breaker to the "I ON" position.
Make sure the white POWER indicator light is lit.
2.4.4.2 Press the white START button. The motor will
start. If the red "FAULT" indicator light is flashing,
interchange two of the three phases on the power-
supply cable terminals in the control panel. DO NOT
restart until correct rotation is established.
2.5 Ground Each System Components
Static electricity can be generated during the recovery
operation. All system components must be earth
grounded and only static conductive hose must be used.
2.5.1 Attach an external ground from an earth ground
to the grounding bolts on each system components.
To prevent shocks from static electricity and
damage to electronic processors, attach an
external-grounded wire from an earth ground
to each system component. Use only static
conductive suction hoses with the system.
2.6 Compressed-Air Requirements and
Connections
To avoid the risk of injury from the releases of
trapped compressed air, install an isolation
valve and bleed-off valve where the air supply
is tapped into the compressed-air system. This
enables depressurization of the compressed-
air lines before performing maintenance.
2.6.1 Dust-Collector Pulse Chamber – Figure 11
The compressed-air supply to the pulse chamber must
be clean dry air, maximum of 85 psi, cfm noted below:
Models 750, 1600, and 2000 require 7 cfm
Models 3000, 4000, and 5000 require 14 cfm
Compressed air supplied to the dust-collector
pulse chamber must be clean, dry air. Moist
air will decrease filter cleaning efficiency and
reduce filter cartridge life.
2.6.1.1 Apply thread sealant to the male pipe threads
of an air fitting that is compatible with the air-supply
hose fitting, as noted in Section 2.6.1.2, and install it
onto the pressure regulator inlet, mounted to the end
cap on the dust-collector pulse chamber, as shown in
Figure 11. NOTE: MB-750 pulse chamber is
mounted atop the dust-collector lid.
Hose disconnection while under pressure can
cause serious injury or death. Use safety lock
pins or safety wire to lock twist-on couplings
together and to help prevent accidental
separation, and use safety cables to prevent
hose from whipping should separation occur.
Safety lock pins and safety cables are listed in
Section 11.1: Optional Accessories.
2.6.1.2 Connect an air hose of at least the same ID as the
regulator thread size, and connect it from the air source to
the previously installed air fitting on the pressure regulator.
2.6.1.3 Provide air to the regulator and set pressure to
75 to 80 psi. Do not exceed 85 psi. Refer to Section
7.3 to adjust pulse pressure.
Figure 11
The type of air fitting and hose connections are for
reference only.
When using twist-on couplings, install safety lock pins to
prevent accidental disconnections.
Use a safety cable to secure the air hose to the suction unit
to prevent the hose from whipping should separation occur.
Safety Cable
Once installed, remove all slack from the cable.
Safety Lock Pins
Pulse-Pressure Regulator
Pulse Chamber
Apply thread sealant to the male NPT threads of the air fitting.
Connect compressed-air supply hose.
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 11
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
2.7 Place Abrasive and/or Waste Containers
2.7.1 Recovery storage hopper: Place a blast
machine(s), abrasive storage container, or waste
container under the central dump valve. Recyclable
abrasive can be returned to the blast machine for reuse
or stored in weather-tight containers. Spent expendable
abrasives are emptied into waste containers for
disposal.
2.7.2 Cyclone precleaner: Place a waste container
or tie a disposal bag under the precleaner butterfly
dump-out valve.
2.7.3 Dust-collector hopper: Place a waste
container or tie a disposal bag under the dust-collector
butterfly dump-out valve.
3.0 ACCESSORIES
3.1 Multiple Vacuum-Hose Manifolds
Hose manifolds divide a single, large-diameter
recovery hose for use with multiple, smaller-diameter
hoses.
Although smaller-diameter hoses are easier to
manage, splitting the hose can reduce
recovery rates by 30% to 50%
3.1.1 Refer to the table in Figure 12 to determine the
recommended manifolds for recovery hose diameter.
Manifolds and recovery hoses are listed in Section
11.1: Accessories.
RECOMMENDED VACUUM-HOSE MANIFOLDS
Recovery Hose Dia. Manifold Recommendation
6" ID 6" x two 4"
5" ID 5" x two 3"
4" ID * 4" x three 2"
* 2" ID Hose is for dust removal only, used with a
suction nozzle, floor brush, and similar broad
attachments.
Figure 12
3.2 Vacuum Tools for Dust Removal
3.2.1 Commercial vacuum heads such as floor and
brush attachments are available from local vendors.
Make sure they can be used with 2" ID vacuum hose.
4.0 INITIAL STARTUP
Perform an initial startup each time the equipment is
setup, as noted in Section 2.0.
4.1 Refer to the blower (vacuum pump) operations
manual and check oil in both sides of the blower.
4.2 Perform all routine startup instructions, as
noted in Section 6.0.
5.0 PERSONAL PROTECTIVE EQUIPMENT
All dust is hazardous to breath. Before blasting,
test the coating and substrate for toxic materials,
such as lead or other heavy metals, or asbestos.
These hazards require special measures to
protect operators and the environment.
Obtain a safety data sheet (SDS) for the blast
abrasive to identify hazardous substances.
Silica sand (crystalline) can cause silicosis,
lung cancer, and breathing problems in
exposed workers. Slag abrasives may contain
trace amounts of toxic metals such as arsenic,
beryllium, and cadmium. Any abrasive dust
has potential to cause lung disease.
Abrasive blasting and recovery operations
can create high levels of dust and noise. No
dust is safe to breathe. Abrasive blasting can
produce harmful dust. Failure to wear NIOSH-
approved respirators can result in serious lung
disease or death. The respirators must be
properly fitted and maintained. Use only
NIOSH-approved, Type CE supplied-air
respirators approved for abrasive blasting.
Everyone working in the vicinity of abrasive
blasting must wear properly maintained,
NIOSH-approved, respiratory protection, eye
protection, and hearing protection appropriate
for the job site hazards.
It is the employer’s responsibility to train
employees to identify hazardous substances
and to provide suitable policies, procedures,
monitoring, recordkeeping, and personal
protective equipment.
5.1 Who Is Required to Wear Protective
Clothing: Operators and anyone else who may be
exposed to the hazards generated by the blasting and
recovery process must wear appropriate protective
gear, including eye and hearing protection, and
NIOSH-approved respiratory protection appropriate for
the job site hazards.
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 12
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
5.2 Donning Protective Clothing: Don protective
attire outside the blast and recovery area in a clean
nonhazardous environment, free of contaminants, and
where the air is safe to breathe.
5.3 Doffing Protective Clothing: When finished
with the recovery process and after cleanup is
completed, remove the respirator and protective
clothing outside the respirator-use area in a clean
environment where the air is safe to breathe.
6.0 OPERATION
This equipment is designed for use with
nonflammable and nonexplosive dust. Before
putting this equipment into full service, the
user must test the dust for fire and explosive
hazards. Failure to follow this warning can
result is injury or death from fire or explosion.
6.1 Startup
6.1.1 Make sure all hose connections are secure
and all doors are closed and secured.
Recovery Hopper:
Access hatch must be closed and secure.
Butterfly valve must be tightly closed. A partially
open or leaking butterfly valve will cause
considerable damage to the bottom outlet.
Secondary ports must be capped or closed.
Recovery hose and interconnecting hoses must
be connected and secure.
Suction nozzle is attached to the pickup end of
the recovery hose.
Cyclone Precleaner:
Butterfly valve must be tightly closed. A partially
open or leaking butterfly valve will cause
considerable damage to the bottom outlet.
Interconnecting hoses must be connected and
secure.
Dust Collector:
Make sure the butterfly valve is tightly closed.
The unit will not start if the valve is open or
partially open.
Make sure the air connection is made, air supply
is on, and air pressure is set between 75 psi and
80 psi.
Make sure inlet hose is secure.
Make sure the dust-collector cover plates are
closed and secure.
Motor Compartment:
Front and side covers are latched and bolted.
Make sure electrical connection is made and that
electrical power is supplied to the suction module
panel.
If additional units are included, each unit must be
checked.
6.1.2 Turn the main breaker to the "I ON" position.
Make sure the white POWER indicator light is lit. If it is
not lit, check the power supply.
6.1.3 Press the white START button; the motor will
start. If the red indicator light marked "FAULT" is
flashing on the initial startup, interchange two of
the three phases on the power-supply cable
terminals in the control panel.
Do not restart until the correct rotation is
established by interchanging two of the three
phases on the power-supply cable terminals
in the control panel.
If the "FAULT" light flashes during subsequent start-
ups, check for the probable cause, per Section 10.3:
Red lamp marked FAULT flashes.
6.1.4 System is now ready for operation by pressing
the white START button.
6.2 Operation
6.2.1 Start the recovery equipment by pressing the
white START button.
6.2.2 Check the operation of the safety valve, per
Section 9.6.
6.2.3 Adjust the suction nozzle, per Section 7.2, and
begin recovery.
NOTE: Operating vacuum is usually between 4" to 8"
Mercury (Hg), as indicated on the vacuum gauge.
Constant lower vacuum normally indicates a vacuum
leak or that the suction nozzle adjustment is open too
far. Constant higher vacuum usually indicates not
enough air enters the suction nozzle. Some
applications may obtain better conveying rates with
lower or higher than normal vacuum. Best conveying
rates will be achieved by monitoring the vacuum gauge
and air-abrasive mixture.
6.3 Shutdown
6.3.1 Remove the suction nozzle from the abrasive
and run the system long enough to clear the recovery
hose and interconnecting hoses.
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© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
6.3.2 Press the black STOP button to shut off the
vacuum-pump motor.
NOTE: After pressing the STOP button, an after-
sequence pulse-cleaning cycle continues for 10 minutes.
During that period, the GREEN ON lamp flashes.
Do not shut off the compressor or the power
supply to the system until the after-sequence
cleaning period is completed and the green
lamp has stopped flashing. Shutting off the
compressor or interrupting the power supply
prematurely ends the pulse-cleaning period.
6.3.3 Turn the main breaker to position "O OFF".
The white lamp marked POWER switches off.
6.3.4 Make sure the exhaust flap on the top of the
dust-collector silencer is closed. Close it if it is open.
6.3.5 Open the butterfly valves on the recovery
hopper, precleaner hopper, and dust-collector hopper
and empty the contents into suitable containers.
Depending on the type of abrasive, it might be
necessary to empty the dust compartment
several times a day. Check the contents
frequently. It is essential that the dust
collection compartment is not allowed to
overfill, as this will reduce operating
efficiency, cause cartridge wear, and elevate
vacuum pressure, leading to overheating and
damage to the vacuum pump.
7.0 ADJUSTMENTS
7.1 Pulse Intervals
7.1.1 Filter cartridges are cleaned by a jet pulse once
per minute. When the unit is stopped, the pulse-cleaning
cycle continues for 10 minutes. Although The pulse
intervals do not usually require changing, different
configurations are built into the PLC so that the pulse
intervals can be changed if needed.
7.2 Suction Nozzle – Figure 13
Best recovery rates are obtained by maintaining a
consistent balance of abrasive and vacuum air-flow.
Restriction of airflow into the recovery hose
will cause decreased recovery rates,
blockages in the recovery hose, and high
vacuum, which overheats the vacuum pump
and motor, causing extensive damage, and
also voids the warranty.
7.2.1 Make a mark on the inner tube along the rim of
the outer tube. Doing so provides a fast reference for
measuring the offset and to return the tool to factory
setting. Factory setting is 3/8” between the end of the
inner tube and spacer stops, as shown in Figure 13.
7.2.2 Loosen the three setscrews on the outer
nozzle-tube collar, at the hose end of the suction nozzle,
as shown in Figure 13.
Figure 13
Measure distance between
end of inner tube and spacer
stops. Factory setting is 3/8".
Setscrews
Outer Nozzle Tube
Inner Tube
Introduced Air
Spent Abrasive
Make a mark on the inner
tube to show original setting.
Spacers
Introduced Air
MB-SERIES ABRASIVE VACUUM SYSTEMS Page 14
© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
7.2.3 Slide the outer tube up or down in 1/8" or less
increments.
Increase distance to draw in more air, for longer
hose, and more bends.
Decrease distance to draw in less air, for shorter
hose, and few bends.
7.2.4 Tighten the setscrews, making sure they are
positioned on the spacers on the inner nozzle-tube.
7.2.5 Test the recovery rate by checking (usually in
seconds, no more than one minute) the time required to
recover from a container or measured amount of abrasive.
7.2.6 Repeat the process, making minor
adjustments until optimum recovery time is achieved.
7.2.7 Measure the distance between the end of the
inner tube and spacer stops, and make a note of the
distance for future reference
7.3 Pulse Pressure – Figure 14
7.3.1 A pressure regulator is located on the pulse
chamber inlet. NOTE: MB-750 pulse chamber and
regulator are mounted atop the dust collector lid.
Set pressure to 75 to 80 psi.
7.3.2 To adjust pressure:
1. Pull up on the knob; a short snap as the knob is
pulled up unlocks it.
2. Turn the knob clockwise to increase pressure or
counterclockwise to decrease pressure.
3. Once operating pressure is set, push down on
the knob to lock it and maintain the setting.
Do not exceed 85 psi. Optimum pressure is
between 75 and 80 psi. Higher pressure does
not improve cartridge cleaning and reduces
cartridge life.
Figure 14
7.4 Adjusting the Vacuum Safety-Relief Valve
Figure 15
7.4.1 Check the operation of the relief valve, as
noted in Section 9.6. If the reading exceeds -0.5 bar /
14.5" Hg or if it does not go above -0.4 bar / 13" Hq,
the safety valve must be adjusted.
7.4.2 Open the motor-compartment door but do not
remove the guard. The safety-relief valve, as shown in
Figure 15, is located inside the motor compartment on
the inlet side of the vacuum pump.
Always perform an approved electrical
lockout and tagout procedure before
removing the safety guard.
Never remove the safety guard when the
vacuum pump motor is operating.
Never turn ON the motor if the safety guard
is not securely bolted in place.
Failure to follow these warnings can result in
severed limbs, death, or other injury from
moving parts.
7.4.3 After electrical power is locked out and tagged
out, loosen the upper and lower jam nuts on both side
of the safety guard and pull the guard (the guard
mounting tabs are slotted) off the mounting bolts.
NOTE: Because the relief valve is inside the motor
chamber, all adjustments must be made with the
motor turned OFF and locked out and tagged out.
Figure 15
7.4.4 If negative pressure exceeds -0.5 bar / 14.5"
Hq when the inlet is totally blocked, turn the tensioning
rod with a wrench one full-turn counterclockwise to open
the valve at lower vacuum, as shown in Figure 15.
Tensioning Rod
Safety-Relief Valve Assembly
Air-Induction Slots
Turn counterclockwise
to reduce compression and
open at lower vacuum.
Turn clockwise
to increase compression and
open at higher vacuum.
Compressed-Air Inlet
Dust-Collector Pulse Chamber
Adjustment Knob
Pull knob up to unlock.
Adjust per Paragraph 7.3.2.
Push down to lock.
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© 2022 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 30801, 06/22
Replace the guard, apply power, and press the
START button to start the motor and recheck the
vacuum.
Repeat the process until the vacuum does not exceed
-0.5 bar / 14.5" Hq with the inlet totally blocked.
7.4.5 If negative pressure stays at or below -0.4
bar/13" Hq when the inlet is totally blocked, turn the
tensioning rod with a wrench one full-turn clockwise to
open the valve at higher vacuum, as shown in Figure 15.
Replace the guard and recheck the vacuum.
Repeat the process until the vacuum does not exceed
-0.5 bar/14.5" Hq with the inlet totally blocked.
7.4.6 The optimum vacuum while transferring
abrasive is between and -0.3 to -0.4 bar/9" and 12"
Hg, but has a lot to do with hose dimension and
recovery distance. High vacuum is an indication of
blockage in the hose or a full or a segment hopper that
full and needs to be emptied. Recurrent higher
vacuum is an indication of insufficient air induction at
the suction nozzle. Refer to Section 7.2 to adjust the
nozzle. Avoid using a hose without a nozzle to vacuum.
Doing so can cause frequent blockage resulting in
high vacuum.
7.5 Tensioning V-Belts – Figure 16
7.5.1 Perform an approved electrical lockout and
tagout procedure. This step is especially important
with the optional storage-hopper level sensor,
which could start the system without notice.
Operating V-belts pose an extreme pinching
hazard. Before starting the vacuum-pump
motor, make sure the motor-compartment
safety guard is securely fastened to avoid
access to the belts. Before removing the
safety guard to check belts, make sure the
power supply is locked out (be certain the
electrical power supply is off and that it
cannot be started while work is in process)
and tagged out (be certain the electrical
power supply is clearly marked to prevent
restarting while work is in process). Serious
injury or death will occur if limbs or clothing
are caught in the belts of a starting or running
vacuum-pump motor.
7.5.2 Open the motor-compartment door, loosen the
upper and lower jam nuts on both side of the safety
guard, and pull the guard (the guard mounting tabs are
slotted) off the mounting bolts.
Never remove the motor-compartment safety
guard until an approved electrical lockout and
tagout is performed. Moving parts within the
motor compartment pose extreme pinching
hazards, which can result in severing limbs or
death.
V-BELT TENSION TABLE
MB Vacuum System Model Belt Condition Newton Force Pound Force
MB-750 New Belts 354 N to 379 N 80 psi to 85 psi
Used Belts 304 N to 329 N 68 psi to 74 psi
MB-1600 New Belts 473 N to 506 N 106 psi to 114 psi
Used Belts 405 N to 439 N 91 psi to 98 psi
MB-2000 and MB-4000 New Belts 675 N to 723 N 151 psi to 162 psi
Used Belts 578 N to 627 N 130 psi to 141 psi
MB-3000 New Belts 797 N to 854 N 179 psi to 192 psi
Used Belts 683 N to 740 N 153 psi to 166 psi
MB-5000 New Belts 904 N to 969 N 203 psi to 218 psi
Used Belts 775 N to 839 N 174 psi to 188 psi
Each belt should fall within the force range noted. If they do not deflect uniformly, replace the entire set.
Figure 16
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