Clemco ZERO BNP 55 User manual

NOTICE TO PURCHASERS AND USERS OF OUR
PRODUCTS AND THIS INFORMATIONAL MATERIAL
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. It is the responsibility of the employer to ensure that proper
training of operators has been performed and a safe work
environment is provided.
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, engineering balance of, or compliance with
regulations or standard practice of any such combination of
products or components the user may employ.
This equipment is only one component of a cabinet blasting
operation. Other products, such as air compressors, air filters and
receivers, abrasives, equipment for ventilating or dehumidifying, 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 operation for warnings, information, training, and
instruction relating to the proper and safe use of their equipment.
BNP® 55
Suction Blast Cabinet
O. M. 23350
DATE OF ISSUE: 08/01
REVISION: G, 02/19
© 2019 CLEMCO INDUSTRIES CORP.
One Cable Car Dr.
Washington, MO 63090
Phone [phone]
Fax [phone]
Email: [email protected]
www.clemcoindustries.com

BNP® 55 SUCTION BLAST CABINET Page 1
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
1.0 INTRODUCTION
1.1 Scope of Manual
1.1.1 These instructions cover set up, operation,
maintenance, troubleshooting, optional accessories, and
replacement parts for BNP-55 series suction blast
cabinets. The instructions covers the operation of all
pull-thru reclaimers and the installation of the dust
collector. One of the following supplemental manuals is
provided with the dust collector. Refer to the appropriate
manual for installation, operation, and maintenance of
the collector:
 CDC-1 Dust Collectors, manual stock no. .. 28225
 RPC-2 Dust Collector, manual stock no. ..... 22788
1.1.2 These instructions also contain important
information required for safe operation of the cabinet.
Before using this equipment, all personnel associated
with the blast cabinet’s operation must read this entire
manual and all accessory manuals to become familiar
with their operation, parts and terminology.
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
Notice indicates information that is considered
important, but not hazard-related, if not
avoided, could result in property damage.
CAUTION
Caution indicates a hazardous situation that, if
not avoided, could result in minor or moderate
injury.
WARNING
Warning indicates a hazardous situation that, if
not avoided, could result in death or serious
injury.
DANGER
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
General Description ....................................................1.4
Theory of Operation ....................................................1.5
Reverse-Pulse Dust Collector Options .......................1.6
Nozzle Options ...........................................................1.7
Reclaimer Options ......................................................1.8
Blasting Media ............................................................1.9
Compressed Air Requirements ............................... 1.10
Electrical Requirements ........................................... 1.11
INSTALLATION .........................................................2.0
General Installation Notes ..........................................2.1
Connect Conveying (flex) Hose ..................................2.2
Connect Compressed-Air Supply Lines .....................2.3
Ground the Cabinet and Dust Collector ......................2.4
Connect Electrical Service ..........................................2.5
Standard single-phase wiring .............................. 2.5.1
Optional three-phase wiring ................................. 2.5.2
Set Air-Inlet Damper ...................................................2.6
Final Assembly ...........................................................2.7
FIELD INSTALLED ACCESSORIES .........................3.0
Aluminum Oxide (aggressive media) Kit ....................3.1
Cabinet Curtains Installation .......................................3.2
Manometer ..................................................................3.3
Armrest .......................................................................3.4
Track and Low Profile Table .......................................3.5
OPERATION ..............................................................4.0
Media Loading ............................................................4.1
Media Unloading .........................................................4.2
Loading and Unloading Parts .....................................4.3
Blasting Operation ......................................................4.4
Blasting Technique .....................................................4.5
Stop Blasting ...............................................................4.6
Shutdown ....................................................................4.7

BNP® 55 SUCTION BLAST CABINET Page 2
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
ADJUSTMENTS ........................................................ 5.0
Blasting Pressure (pilot regulator) .............................. 5.1
Air Jet Adjustment ....................................................... 5.2
Media-Air Mixture (media flow) .................................. 5.3
Reclaimer Static Pressure .......................................... 5.4
Optional Externally Adjustable Vortex Cylinder ......... 5.5
Cabinet Air-Inlet Damper ............................................ 5.6
Door Interlocks ........................................................... 5.7
Optional Manometer ................................................... 5.8
PREVENTIVE MAINTENANCE ................................. 6.0
Daily Inspection and Maintenance Before Blasting .... 6.1
Check media level ................................................ 6.1.1
Inspect reclaimer debris screen and door gasket ... 6.1.2
Drain compressed-air filter ................................... 6.1.3
Inspect dust container .......................................... 6.1.4
Daily Inspection During Blasting ................................. 6.2
Inspect cabinet for dust leaks .............................. 6.2.1
Check exhaust air for dust ................................... 6.2.2
Drain pulse reservoir ............................................ 6.2.3
Cartridge pulsing .................................................. 6.2.4
Weekly Inspection and Maint. Before Blasting ............. 6.3
Inspect view-window cover lens .......................... 6.3.1
Inspect gloves ...................................................... 6.3.2
Inspect BNP® gun assembly ................................ 6.3.3
Inspect media hose .............................................. 6.3.4
Weekly Inspection During Blasting ............................ 6 . 4
Inspect flex hose for leaks .................................... 6.4.1
Monthly Inspection and Maintenance ......................... 6.5
Reclaimer wear plate and liners ........................... 6.5.1
Dust Collector ............................................................. 6.6
SERVICE MAINTENANCE ......................................... 7.0
Gloves ......................................................................... 7.1
BNP® Gun Assembly .................................................... 7.2
View-Window Cover Lens ........................................... 7.3
View-Window Replacement ........................................ 7.4
Window-Gasket Replacement ..................................... 7 . 5
Window-Frame Removal ............................................. 7.6
LED Light Assembly .................................................... 7.7
Replacing Reclaimer Wear Plate ................................ 7.8
Replacing or Installing Rubber Reclaimer Liners ........ 7.9
Replacing or Removing Reclaimer Inlet Baffle .......... 7.10
Reverse-Pulse Dust Collector ................................... 7.11
TROUBLESHOOTING ................................................ 8.0
Poor visibility ............................................................... 8.1
Abnormally high media consumption .......................... 8.2
Reduction in blast cleaning rate .................................. 8.3
Plugged nozzle ............................................................. 8.4
Media bridging .............................................................. 8.5
Media Surge ................................................................ 8.6
Blockage in Media Hose ............................................. 8.7
Poor Suction in Media Hose ........................................ 8.8
Air only (no media) from Nozzle ................................... 8.9
Blowback through media hose .................................. 8.10
Blasting does not begin when foot pedal is pressed ....... 8.11
Blasting continues after foot pedal is released ......... 8.12
Media buildup in cabinet hopper ............................... 8.13
Static Shocks ............................................................. 8.14
Dust leaking from cabinet ......................................... 8.15
Dust leaking from dust collector ............................... 8.16
ACCESSORIES AND REPLACEMENT PARTS ....... 9.0
Optional Accessories .................................................. 9.1
Cabinet Replacement Parts ........................................ 9.2
BNP® Gun and Hose Assembly ................................... 9.3
Inlet-Air Regulator Assembly ...................................... 9.4
View-Window Assembly .............................................. 9.5
Metering Valve, BNP ................................................... 9.6
Foot Pedal Assembly ................................................... 9.7
LED Light Assembly ................................................... 9.8
Cabinet Controls and Plumbing .................................. 9.9
Replacement Reclaimer Assemblies ........................ 9.10
300 CFM Reclaimer Replacement Parts ................... 9.11
600 CFM Modular Reclaimer Replacement Parts ..... 9.12
1.4 General Description
1.4.1 BNP blast cabinets enclose the blasting
environment to provide efficient blasting while
maintaining a clean surrounding work area. Production
rates are influenced by size of nozzle, compressor
output, working pressure, type and size of media, and
angle and distance of the nozzle from the blast surface.
BNP suction cabinets consist of three major
components:
 Cabinet Enclosure
 Reclaimer
 Dust Collector
Refer to Figure 1 for arrangement of components with a
CDC-1 Dust Collector. Figure 2 shows the arrangement
with a RPC-2 600 cfm (not available in 300 cfm) Reverse-
Pulse Dust Collector with dust drawer. To upgraded, an
RPC-2 collector may be added at any time.
1.5 Theory of Operation
1.5.1 Once the cabinet is correctly set up and turned
on, the cabinet is then ready for operation by actuation
of the foot pedal. Fully depressing the foot pedal causes
air to flow through the blast gun. The partial vacuum
created by air moving through the gun draws media into
the blast-gun mixing chamber. The media mixes with the
air stream and is propelled out the nozzle. After striking
the object being blasted, the blast media, fines, dust,
and byproducts generated by blasting fall through the
grate into the cabinet hoppers. These particles are then
drawn into the reclaimer for separation. Dust and fines
are first separated from reusable media and pass into
the dust collector. Next, the media is screened for
oversize particles and returned to the reclaimer hopper
for reuse. Dust and fines entering the dust collector are
removed from the air stream as they pass through the
filters, discharging clean air. When the foot pedal is
released, blasting stops.

BNP® 55 SUCTION BLAST CABINET Page 3
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
Figure 1
Some item removed or rotated for clarity.
On-Off Switch
Air-Inlet Damper
Dust Drum
LED Light
CDC-1 Dust Collector
Door Interlock Valve
Reclaimer
600 cfm reclaimer shown.
300 cfm reclaimer does not
have flanged bolt-on top or
hopper.
Debris Screen
Blow-Off
Nozzle
Metering Valve
Li
g
ht-Lined Flex Hose
Air Filter
(Attachment for
compressed-air supply).
Grounding Lug
Unlined Flex Hose
Pilot Regulator
Pilot-Operated
Pressure Regulator
To Blast Gun
To Blo
w
-Off Nozzle
BNP Blast Gun
Auxiliary Air Port (plugged)
Use for pneumatic accessories.
120-Volt Cord
Arm Ports
Dust-Collector Damper
Door Interlock Actuator
Foot Pedal

BNP® 55 SUCTION BLAST CABINET Page 4
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
1.6 Reverse-Pulse Dust Collector Options
WARNING
All dust is hazardous to breath. Emissions can
occur from the dust collection system. Identify
all materials that are to be removed by blasting;
if any toxic materials such as lead dust or dust
from other heavy metals and corrosives, or any
other toxic materials are being removed, use a
HEPA afterfilter to assist in maintaining
inhalation hazards below the permissible
exposure limits (PELs). Prolonged exposure to
any dust can result in serious lung disease and
death. Short-term ingestion of toxic materials
can cause serious respiratory injury or death.
Filtration may not be adequate in reducing all
inhalation hazards. It remains the employer or
user’s responsibility to ensure all emissions are
safe to breath.
1.6.1 CDC-1 Dust Collector: Shown in Figure 1, the
collector is available in 300 and 600 models. The single
filter cartridge is cleaned by using a manually-controlled
pulse of compressed air. Dust collects in a 5-gallon dust
drum and must be frequently emptied CDC-1 Dust
Collectors are standard with BNP cabinets unless an
optional RPC-2 Dust Collector is ordered at time of
purchase. Refer to manual number 28225 for operation
of the CDC-1 Dust Collector.
1.6.2 RPC-2 Dust Collector: Shown in Figure 2, this
collector is available in a 600 cfm model. Dual filter
cartridges are automatically cleaned by a timed, periodic
pulse of compressed air. Dust collects in the draw must
be frequently emptied. Refer to manual number 22788
for operation of the RPC-2 Dust Collector.
Figure 2
1.6.3 HEPA (high-efficiency particulate air) Filter:
An optional HEPA afterfilter provides additional filtration
and must be used with a reverse-pulse cartridge
collector when removing toxic coatings, heavy metals, or
any other toxic materials. Refer to the applicable dust-
collector manual noted in Paragraph 1.1.1 for the HEPA
option.
1.7 Nozzle Options
1.7.1 Unless otherwise specified at the time of
purchase, the cabinet is provided with a No. 5 (5/16"
orifice) ceramic nozzle and No. 5 (5/32" orifice) air jet.
Optional, more durable tungsten carbide and boron
carbide nozzles are available and are shown under BNP
Gun and Feed Assembly in Section 9.3. Use a boron
carbide nozzle when blasting with aggressive media, as
noted in Section 1.9.4.
1.8 Reclaimer Options
1.8.1 Replaceable rubber reclaimer liners: Rubber
liners are available for 600 cfm reclaimers that have a
removable top and are designed to accept liners. Liners
are not available for 300 cfm reclaimers. The liners
prolong service life of the reclaimer and should be
installed when using silicon carbide, aluminum oxide, or
other aggressive media, as noted in Section 1.9.4.
Rubber liners are shown on Page 30, Figure 31.
1.8.2 Externally adjustable vortex option: Not
available for 300 cfm reclaimer. The vortex is available
for 600 cfm reclaimers only. It fine-tunes media
separation; refer to Section 5.5 for additional
information. The vortex is an option when the cabinet is
provided with a CDC-1 Dust Collector but is standard on
600 cfm reclaimers when the cabinet is provided from
the factory with an RPC-2 Dust Collector.
1.9 Blasting Media
1.9.1 Always use media specifically manufactured for
blasting and that are compatible with the surface being
blasted. Media produced for other applications may be
inconsistent in size and shape, contain particles that
could jam the media metering valve, or cause irregular
wear. Always obtain the safety data sheet (SDS) for the
blasting media prior to blasting and identify material
being removed by blasting, paying particular attention to
worker health risks and presence of any hazardous/toxic
substances.
Most common reusable media specifically manufactured
for blasting can be used in ZERO cabinets. The listing of
media sizes shown in this section and in Figure 3 are
provided as a guideline only. The guideline is based on
standard 5/32" orifice air jet with 5/16" nozzle and
average conditions with variables such as blast
RPC-2
Dust Collector
Damper
Reclaimer Outlet
Duct
Inlet

BNP® 55 SUCTION BLAST CABINET Page 5
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
pressure, media-air mixture, visibility inside the cabinet,
humidity, and reclaimer cleaning rate.
Several variables that affect the reclaimer cleaning rate
include reclaimer size (cfm), contamination of parts
being blasted, media friability, damper setting (static
pressure), and dust-collector filter loading (differential
pressure across the dust filters).
As a rule, larger orifice air jets and nozzles deliver more
media, requiring higher performance from the reclaimer.
When using larger nozzles, the maximum mesh size of
media will be smaller than normally recommended.
Using media finer than those recommended may
decrease visibility and, at some point, carry over to the
dust collector. Media coarser than those recommended
may be too dense for the reclaimer to recover from the
cabinet hopper.
1.9.2 Steel shot and steel grit: Steel grit or shot are
too heavy to use in BNP-55 Cabinets.
1.9.3 Sand and slag: Sand and slag media are not
suitable for cabinet use. Sand should NEVER be used
for abrasive blasting because of the respiratory hazards
associated with media containing free silica. Slags are
not recommended for cabinet use because they rapidly
break down and are not recyclable.
1.9.4 Silicon carbide, aluminum oxide, and garnet:
These are the most aggressive of the commonly used
media. Aggressive media may be used, but the service
life of any components exposed to the media will be
reduced. To avoid unscheduled downtime and maximize
cabinet life, periodically inspect the reclaimer wear plate,
blast hose, and nozzle for wear and replace parts as
needed.
When using aggressive media only occasionally, install
an optional aluminum oxide kit, which includes rubber
curtains for the cabinet interior and a boron carbide-
lined nozzle. When using aggressive media on a regular
basis, install the aluminum oxide kit and a fully rubber-
lined reclaimer. Rubber-liners are not available for 300
cfm reclaimers. Liners for 600 cfm reclaimers can be
factory-installed items, or field-installed later on
reclaimers if they have removable tops and are
designed to accept liners. Nozzles lined with boron
carbide extend nozzle wear life. Refer to Section 9.3:
BNP Gun and Feed Assembly.
1.9.5 Glass bead: Most beads are treated to ensure
free-flow operation, even in environments of moderately
high humidity. Glass beads subjected to excessive
moisture may be reused only after thoroughly drying and
breaking up of any clumps.
1.9.6 Lightweight and fine-mesh media: When
using lightweight (such as agricultural) media or fine-
mesh (180-mesh and finer) media, the reclaimer inlet
baffle may need to be removed to retain media and
avoid carry over. On 600 cfm reclaimers with bolt-on
removable tops, baffle removal and replacement is
easily accomplished, as explained in Section 7.10.
Reclaimers with welded-on tops require grinding to
remove the baffle, and once it is removed, it cannot be
replaced.
1.9.7 Plastic media: Plastic and similar lightweight
and/or nonaggressive media are generally not
recommended for suction-style cabinets because the
lower blast velocity of suction blasting combined with the
softer and lighter weight media do not provide the media
impact for productive blasting. Best performance from
plastic media is achieved with pressure blasting,
requiring a pressure vessel with a 60-degree conical
bottom. Refer to Clemco’s AEROLYTE cabinet line.
This table offers a guideline to media type and selection based on standard 5/32" orifice air jet with 5/16" nozzle and
average conditions, such as air pressure, media-air mixture, visibility, contamination of parts being cleaned, humidity,
media friability, reclaimer cleaning rate, etc. As a rule, larger nozzles deliver more media, requiring higher performance
from the reclaimer. Larger air jets and nozzles decrease the maximum mesh size of media from those recommended.
Media that is finer than those recommended may decrease visibility and increase carry over to the dust collector. Media
coarser than those recommended may be too dense for the reclaimer to recover from the cabinet hopper.
MEDIA TYPE
RECLAIMER SIZE STEEL GRIT STEEL SHOT GLASS BEAD ALUM. OXIDE FINE MESH LIGHT WT.
*300 cfm w/4" inlet Do not use Do not use No. 6 to No. 12 60 to 180-mesh See 1.9.6 See 1.9.7
*600 cfm w/5" inlet Do not use Do not use No. 6 to No. 12 54 to 180-mesh See 1.9.6 See 1.9.7
* Standard reclaimer inlets
Figure 3

BNP® 55 SUCTION BLAST CABINET Page 6
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
1.9.8 Bicarbonate of soda: Bicarbonate of soda is
not recommended for use in standard cabinets. Bicarb is
a one-use media, which will quickly saturate the filter
cartridge(s). Best performance from bicarb media is
achieved with pressure blasting, requiring a pressure
vessel. Refer to Clemco’s AEROLYTE cabinet line for
cabinets that are specifically designed for use with
bicarbonate of soda.
1.10 Compressed-Air Requirements
1.10.1 The size of the compressor required to operate
the cabinet depends on the size of the air jet and
blasting pressure. Unless otherwise specified, cabinets
are supplied with a No. 5 (5/32" orifice) jet. Refer to the
table in Figure 4 to determine cfm requirements. Consult
with a compressor supplier for suggested compressor
size based on the air consumption. NOTE: A separate
air line is required for the reverse-pulse dust
collector. If preferred, remove the plug from the
auxiliary air port (shown in Figure 4) and connect a
1/4″ ID or larger air line to the dust-collector pulse
reservoir. Refer to the dust-collector owner’s manual
for setup instructions.
Compressed-Air Consumption in CFM
BNP Gun
Jet
Orifice
Nozzle
Orifice CFM PSI
No. 4 1/8" 5/16" 21 80
No. 5 5/32" 5/16" 32 80
No. 6 3/16" 3/8" 47 80
*No. 7 7/32" 7/16" 62 80
*No. 8 1/4" 1/2" 86 80
* Using this combination could affect usable media
size; refer to Section 1.9.
Figure 4
1.10.2 The air filter at the air-inlet connection reduces
condensed water from the compressed air. Its use is
especially important in areas of high humidity or when
using fine-mesh media. Moisture causes media to clump
and inhibits free flow through the feed assembly. If the
filter does not remove enough moisture to keep media
dry and flowing, it may be necessary to install an air
dryer or aftercooler in the air-supply line.
1.11 Electrical Requirements
Standard 300 cfm and 600 cfm cabinets and dust
collectors are 120-volt single phase. Incoming power to
the cabinet is supplied by a U-ground plug; plug it into a
120-volt outlet.
All wiring external of the cabinet is provided by the user
to comply with local electrical codes.
1.11.1 Electrical requirements depend on the size and
phase of the dust-collector exhauster motor. NOTE: Full
load amps (FLA) shown below are for the motor only;
the lights draw less than 1 amp. Standard cabinets are
supplied as follows:
300 cfm: 1/2 HP, 120/208/240 V, 1-PH, 60 HZ,
wired 120, FLA 20/7, 208/3.4, 240/3.5.
600 cfm: 1 HP, 120/240 V, 1-PH, 60 HZ,
wired 120, FLA 120/12, 208/6.6, 240/6.2.
Refer to Section 2.5 to connect electrical service
2.0 INSTALLATION
Unless noted otherwise, the sequence of assembly in
Sections 2.2 through 2.7 may be done in any order that
is convenient for the installer.
2.1 General Installation Notes
2.1.1 Refer to Figure 1 (and Figure 2 for optional
RPC-2 Dust Collector) for the general arrangement.
Place all components in a convenient location where
compressed air and electrical service are available. The
cabinet location must comply with OSHA and local
safety codes. Allow for full access to all doors and
service areas, and for efficient handling of large parts.
Provide enough clearance at the dust collector to do
maintenance and to remove the dust container.
Determine the best location for all components and
position them before making compressed air
connections, electrical connections, and attaching flex
hose.
2.1.2 Refer to the dust-collector owner’s manual to
set up the dust collector and prepare it for operation.
2.2 Connect Conveying (flex) Hose
2.2.1 Connect the smaller-diameter flex hose
between the cabinet-hopper pipe adaptor and reclaimer
inlet adaptor, and connect the larger-diameter hose
between the reclaimer outlet and dust-collector inlet. It is
easier to slip the hose over the adaptors and create a
tighter seal if the first two or three inches of wire are
removed from the inside of the hose. Use care not to
damage the hose. Clamp flex hose securely in position
with worm clamps provided. NOTE: The hose wire
helps dissipate static electricity in the conveying
hose and helps ground each segment. In order for
the hose wire to dissipate static electricity, the wire
must touch the metal of each segment.

BNP® 55 SUCTION BLAST CABINET Page 7
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
2.3 Connect Compressed-Air-Supply Lines
A separate air line is required for the dust-collector
pulse. The line may be connected to the auxiliary-air port
on the cabinet plumbing, as shown in Figure 6.
WARNING
Failure to observe the following before connecting
the equipment to the compressed-air source can
cause serious injury or death from the sudden
release of trapped compressed air:
 Lockout and tagout the compressed-air supply.
 Bleed the compressed-air-supply line.
WARNING
To avoid the risk of injury from compressed air,
install an isolation valve and bleed-off valve
where the air supply is tapped into the
compressed-air system. This enables a lockout
and tagout procedure and depressurization of
the compressed-air line before performing
maintenance.
2.3.1 Refer to Paragraph 2.3.2 to determine the
recommended air-supply hose size, then refer to Figure
6 and apply thread sealant to the male threads of an air
fitting that is compatible with the air-supply hose fitting,
and install it onto the 1/2-NPT air filter located under the
cabinet hopper. The style of connection shown in Figure
6 is for reference only.
2.3.2 Refer to the table in Figure 5 to determine the
minimum ID air-supply line to the cabinet air inlet. A
smaller diameter hose may reduce blasting efficiency.
MINIMUM COMPRESSED-AIR LINE ID
Air Jet Size
Air Line Length No. 4 No. 5 No. 6
25 feet 3/4" 3/4" 1"
50 feet 3/4" 3/4" 1"
75 feet 3/4" 1" 1"
100 feet 3/4" 1" 1"
Figure 5
2.3.3 Connect the air line from the air source to the air
filter inlet.
WARNING
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 prevent accidental separation, and
also use safety cables to prevent hose from
whipping should separation occur. Safety lock
pins and safety cables are listed in Section 9.1:
Optional Accessories.
2.3.4 Refer to the dust-collector owner’s manual and
connect a compressed-air line to the pulse manifold.
2.4 Ground the Cabinet and Dust Collector
2.4.1 To prevent static electricity buildup, attach an
external grounded wire from an earth ground to the
grounding lug on the left rear of the cabinet. Refer to the
dust-collector owner’s manual and connect a ground
wire to the dust collector.
Figure 6
1/2" NPT Air Filter
Use safety lock pins to
secure twist-on couplings.
Air-Supply Hose
Air Fitting
Use safety cable to prevent separated hose from whipping.
Once installed, all slack must be removed from the cable.
Plugged
Auxiliary-Air Port
Apply thread sealant to male threads.
To blow-off Nozzle

BNP® 55 SUCTION BLAST CABINET Page 8
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
2.5 Connect Electrical Service
WARNING
Shorting electrical components can result in
serious injury or death from electrical shock or
equipment damage. Electrical power must be
locked out and tagged out before performing
any electrical work. All electrical work or any
work done inside a control panel or junction
box must be performed by a qualified
electrician, and comply with applicable codes.
All wiring external to the cabinet is provided by the user
to comply with local electrical codes.
2.5.1 Standard single-phase wiring
2.5.1.1 Standard 300 cfm and 600 cfm cabinets and
dust collectors are wired 120-volt single-phase. Power to
the cabinet is supplied by a U-ground plug; plug it into a
120-volt outlet.
WARNING
Do not use electrical adaptors that eliminate the
ground prong on 120-volt plugs. Doing so can
cause electric shock and equipment damage.
2.5.1.2 Refer to the wiring schematic in Figure 7 and
wire the dust-collector motor, per instruction on the
motor data plate, to the junction box mounted on the
cabinet.
When wired, as noted in Figure 7, the dust-collector
exhauster motor will start when the cabinet light switch
is turned ON and stop when the switch is turned OFF.
2.5.2 Optional three-phase wiring
NOTE: a wiring schematic is packed inside the cabinet’s
control panel. After wiring is completed, keep a copy of
the schematic with the manual for future reference and
for electrical replacement parts.
2.5.2.1 Refer to the wiring schematic stowed inside the
control panel mounted on the cabinet and wire from the
users disconnect to the panel and from the panel to the
dust-collector motor, per instruction on the motor data
plate.
2.5.2.2 Check the amperage on initial start up; if the
motor draws excessive amperage, gradually close the
dust-collector damper, located on the inlet on CDC-1
Dust Collectors and on the exhauster outlet on RPC-2
Dust Collectors, until the amperage is within the
specifications shown on the motor plate.
2.5.2.3 After wiring is completed, observe the warning
that follows and check the motor rotation. To check
rotation, turn the On-Off switch ON and quickly turn it
OFF, causing the motor to rotate slowly. Look through
the slots in the motor fan housing where rotation of the
fan can easily be observed. Proper rotation is indicated
by the arrow on the exhauster housing; the fan should
rotate toward the exhauster outlet. If it rotates in
reverse, change the wires, as noted on the motor plate
to reverse rotation.
Figure 7
120-VOLT, 1 PH WIRING FOR CABINET AND DUST-COLLECTOR MOTOR
Dashed lines indicate wiring by others (not
Clemco). Wiring is to be of color and gauge
shown, and marked on each end with the
wire number or terminal number as shown.

BNP® 55 SUCTION BLAST CABINET Page 9
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
WARNING
Do not look into the exhauster outlet while the
paddle wheel is turning. Injury to the eye or
face can occur from objects being ejected from
the exhauster.
2.6 Set Air-Inlet Damper ‒ Figure 8
2.6.1 The air-inlet damper is located on the top of the
cabinet and must be set to match the cabinet
dimensions and reclaimer size. The air damper was
preset prior to shipment; confirm the initial setting, as
noted below.
Figure 8
2.6.2 The label on the damper shows the settings in
degrees. The initial setting should align the handle as
follows:
55 with 300 reclaimer ...... align handle to 30 degrees
55 with 600 reclaimer ...... align handle to 30 degrees
2.6.3 Loosen the lock nuts and align the damper
handle as noted. When correctly positioned, tighten the
lock nuts to maintain the setting. Refer to Section 5.6 for
adjustment procedure.
2.7 Final Assembly
2.7.1 Position the foot pedal on the floor at the front of
the cabinet.
2.7.2 A package of five cover lenses is supplied with
the cabinet. To install a cover lens, remove the adhesive
backing and apply the lens to the clean, dry, inner
surface of the view window, per Section 7.3. When the
cover lens becomes pitted or frosted, replace it.
3.0 FIELD INSTALLED ACCESSORIES
Refer to Section 9.1 for Optional Accessories.
3.1 Aluminum Oxide (aggressive media) Kit
3.1.1 An optional aluminum oxide kit is available
factory installed or may be field installed later.
Factory-installed kits consist of black-rubber cabinet
curtains with grommets, curtain hardware, and a boron
carbide nozzle.
Field-installed (or replacement factory-installed) kits
consist of black-rubber cabinet curtains (refer to Section
3.2 for curtain installation) and light-lined flex hose. If the
existing flex hose is in good condition, reserve the new
hose for future replacement.
3.2 Cabinet Curtains Installation
3.2.1 Match curtains to corresponding wall and doors.
3.2.2 Front and rear walls: Position the curtain on
the wall to be protected. Using the curtains as
templates, mark each mounting point through the
grommet holes along the upper edge of the curtain.
NOTE: When laying out the attachment points, the upper
edge of the rear curtain should be below the bottom
edge of the air-duct partition. Remove the curtains and
drill a .187" (3/16") diameter hole at each point marked.
Install the curtains using the fasteners provided
(machine screw, 11/16 OD flat washer, lock washer,
and nut) at each grommet. The flat washer is used
between the screw head and the curtain grommet on all
curtains.
3.2.3 Doors: Using protectors against the curtains
and outer doors; clamp the door curtains in place.
NOTE: When laying out the attachment points, the upper
edges of the door curtains should be even with the outer
edges of the door’s soundproofing panel. Insert a #10
self-drilling screw with an 11/16" OD flat washer through
the grommet holes. Use a screw gun with a 5/16" socket
to drill and thread the screws through the door’s inner
wall at each grommet.
3.3 Manometer
3.3.1 Consistent static pressure is necessary for
precise media separation, as the reclaimer's efficiency is
achieved by a centrifugal balance of air flow, particle
weight, and size. The manometer measures static
pressure. Reclaimer static pressure is set by adjusting
the dust-collector damper. Refer to Section 5.4 to adjust
static pressure. Refer to Section 5.8 for instructions on
using the manometer.
Degrees Label
Air-Inlet Damper
Damper Handle
Align handle to degrees,
as noted above.

BNP® 55 SUCTION BLAST CABINET Page 10
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3.4 Armrest
3.4.1 Assemble the armrest and mounting brackets,
as shown in Figure 9.
3.4.2 Position the assembly so the armrest is about
even with the bottom of the arm-port opening. Mark one
hole location on the front of the cabinet at each
mounting bracket.
3.4.3 Drill a 3/8" hole at both locations and mount the
armrest using 5/16 cap screw, washers, and nuts. Install
the bolts from inside the cabinet to protect the threads
from abrasion, should the armrest need to be removed
later
Figure 9
3.4.4 Match drill the remaining four bracket holes and
install the remaining fasteners.
3.4.5 Loosen the fasteners on the slotted bracket and
raise or lower the armrest to a comfortable position.
3.5 Track and Low Profile Table
Maximum Weight Capacity 500 Lbs
3.5.1 Components of track and table assembly are
shown in Figure 10. The assembly consists of:
 Track assembly: mounts inside the cabinet.
 Table assembly: rollers on sliding table fit inside the
track rails.
 All necessary mounting fasteners.
The track may be installed on either side of the cabinet,
so the table can slide out through either the right side or
left side door. The right side is shown in the illustrations.
3.5.2 Combine the table assembly and track by sliding
the table assembly rollers into the track channels, as
shown in Figure 11.
Figure 10
NOTE: If the weight of the table and track make it too
heavy to install as an assembly, the track may be placed
inside the cabinet to predrill mounting holes, but the
table must be placed within the rails before fasteners are
installed.
Figure 11
3.5.3 Center the track and table assembly inside the
cabinet on top of the grate. Make sure the two angled
mounting brackets are facing toward the door from
which the table will slide, refer to Figure 12.
3.5.4 Match drill two 1/2" diameter holes on each side
of the cabinet, using the holes in the mounting brackets
as a template. NOTE: To prevent the track from shifting,
temporarily place a 3/8-NC x 1-1/2" bolt through each
hole after it is drilled.
Slide table to center or as
needed to position part for
blasting.
Slide table out for ease
of loading part(s). Not
to exceed 500 pounds.
Table Assembly
Track Assembly
Mounting Holes
Mounting Holes
Rollers (4)
Track Rails
5/16 x 1" x Cap Screw,
Flat Washer, Lock
Washer, and Nut
Armrest
3/8 x 1" Cap Screw
and Lock Washer

BNP® 55 SUCTION BLAST CABINET Page 11
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
Figure 12
3.5.5 After the holes are drilled and the table
assembly is placed in the track rails, secure all
fasteners.
4.0 OPERATION
NOTICE
Do not pulse new dust collectors or
replacement cartridges until the cartridges are
properly seasoned, as instructed in the dust-
collector owner’s manual. Pulsing unseasoned
cartridges could cause premature cartridge
failure and decrease the efficiency of dust
collector.
4.1 Media Loading
4.1.1 Media capacity: The approximate capacity and
minimum media amount is shown in the table below.
Reclaimer Size Minimum Wt. Capacity
300 cfm 10 lbs 50 lbs (0.5 cuft)
600 cfm 20 lbs 75 lbs (0.75 cuft)
4.1.2 Media loading: With the exhauster OFF, add
clean, dry media, by pouring it through the reclaimer
door. Do not fill above the hopper on the reclaimer. Do
not pour media directly into the cabinet hopper, as
overfilling may occur. Overfilling will result in media
carry over to the dust collector and possible blockage in
the conveying hose. Refill only after all media has been
recovered from the cabinet.
4.2 Media Unloading ‒ Figure 13
4.2.1 To empty the cabinet and reclaimer of media,
blow off the cabinet interior and run the exhauster until
all media is recovered from the cabinet. Turn OFF the
exhauster, and place an empty bucket of other container
under the metering valve. Unscrew the plastic plug from
the metering valve, permitting media to flow into the
bucket. If media does not flow, it has caked; open the fill
door and stir media until it starts to flow. Before the
container becomes too heavy to easily manage, replace
the plug and empty the container. Replace the plug when
the reclaimer is empty or, if changing media type, purge the
media hose, as noted below.
4.2.2 To purge the media hose, before replacing the
plug turn ON the exhauster, grasp the gun, and press
the foot pedal using the gun to blow off the cabinet
interior until the air from the gun and the cabinet are
clear. Turn OFF the exhauster and replace the plug.
Figure 13
4.3 Loading and Unloading Parts
WARNING
Use solid fixturing to hold heavy parts in place.
Do not remove lift equipment until the part is
adequately supported to prevent movement.
Moving heavy, unsupported parts may cause
them to shift or topple and cause severe injury.
This is especially important with the use of
turntables and tables with tracks.
NOTE: Parts must be free of oil, water, grease, or
other contaminants that will clump media or clog
filter cartridge(s).
4.3.1 Load and unload parts through either door.
4.3.2 When blasting small parts or objects having
small pieces that could become dislodged and fall off,
place an appropriately sized screen over the grate (or
Match Drill
Match Drill
Angled Mount Brackets
Reclaimer hopper
Metering Valve
Plastic Plug
Unscrew plug to empty
media from reclaimer.

BNP® 55 SUCTION BLAST CABINET Page 12
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under the grate when frequently blasting small parts) to
prevent parts from falling into the hopper. If an object
should fall through the grate, stop blasting immediately
and retrieve it.
4.3.3 Close door; the door interlock system will
prevent blasting if either door is open.
4.4 Blasting Operation
W
ARNING
To avoid the inhalation of dust, which can
cause respiratory illness from short-term
inhalation or death from long-term inhalation:
 Use the blow-off nozzle to blow media off
parts before opening doors.
 After blasting, keep doors closed and
exhauster running until the cabinet is clear
of all airborne dust.
 Always close cabinet, reclaimer, and dust-
collector doors before blasting. Keep all
doors closed during blasting.
 Always wear blast gloves.
 Stop blasting immediately if dust leaks are
detected.
4.4.1 Slowly open the air valve on the air-supply hose
to the cabinet. Check for air leaks on the initial startup
and periodically thereafter.
4.4.2 Turn ON the lights and exhauster. The ON/OFF
switch located on the light shield performs both
functions.
4.4.3 Load parts.
4.4.4 Close door; the door interlock system will
prevent blasting if either door is open.
4.4.5 Adjust the pilot-pressure regulator located on
the upper-left side of the cabinet to the required blast
pressure, per Section 5.1.
4.4.6 Insert hands into rubber gloves.
4.4.7 To blast, hold the gun firmly, point the gun
toward the object to be blasted, and apply pressure foot
pressure to the top of the foot pedal; blasting will begin
immediately.
WARNING
Shut down the cabinet immediately if dust
discharges from the dust collector or cabinet.
Make sure dust-collector filter(s) are correctly
seated and not worn or damaged. Prolonged
breathing of any dust can result in serious lung
disease or death. Short-term ingestion of toxic
dust such as lead, poses an immediate danger
to health. Toxicity and health risk vary with type
of media and dust generated by blasting.
Identify all material being removed by blasting
and obtain a safety data sheet (SDS) for the
blast media.
4.4.8 When blasting parts off the grate, use a solid
conductive backrest to support the part. Without this
assist, especially with longer blasting operations, the
operator will tire easily from resisting blast pressure, and
static electricity could buildup in the ungrounded part
and cause static shocks. Whenever possible, avoid
holding small parts that require blasting into the glove.
4.4.9 If an object should fall through the grate, stop
blasting immediately and retrieve it.
4.5 Blasting Technique
4.5.1 Blasting technique is similar to spray painting
technique. Smooth, continuous strokes are most
effective. The distance from the part affects size of blast
pattern. Under normal conditions, hold the nozzle
approximately 3" to 6" from the surface of the part.
NOTICE
To prevent rapid frosting of the view window
install a view window cover lens, per Section
7.3, and avoid pointing the blast nozzle toward
the view window
4.6 Stop Blasting
4.6.1 To stop blasting, remove foot pressure from the
top of the foot pedal.
4.6.2 Use the blow-off nozzle to blow media off
cleaned parts.
4.6.3 Keep doors closed and exhauster running until
the cabinet is clear of all airborne dust.
4.6.4 Unload parts.

BNP® 55 SUCTION BLAST CABINET Page 13
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4.7 Shutdown
4.7.1 Shut off the air-supply valve, bleed the air-
supply line, and drain the compressed-air filter and dust-
collector pulse reservoir/manifold.
4.7.2 Switch OFF the lights and exhauster.
5.0 ADJUSTMENTS
5.1 Blasting Pressure (pilot regulator)
5.1.1 The pilot regulator (located on the top-left side of
the cabinet), enables the user to adjust blasting pressure
while blasting to suit the application. The suitable
pressure for most purposes is about 80 psi. Lower
pressures may be required on delicate substrates and will
reduce media breakdown. Higher pressure may be
required for difficult blasting jobs on durable substrates,
but will increase media breakdown. If pressure is too high,
suction in media hose will decrease, and if high enough
cause blowback in the hose. Optimal production can only
be achieved when pressure is carefully monitored.
5.1.2 To adjust pressure, unlock the knob by pulling it
out, as shown in Figure 14, and turn it clockwise to
increase pressure or counterclockwise to decrease
pressure. Pressure may drop slightly from closed-line
pressure when blasting starts. Once operating pressure
is set, push the knob in to lock it to maintain the setting.
Figure 14
5.2 Air Jet Adjustment ‒ Figure 15
5.2.1 Thread the air jet 4-1/2 to 5 full turns into the
gun body. Doing so will leave 3-1/2 to 4 threads
exposed past the lock nut. Tighten the lock nut to
maintain the setting. Refer to Section 9.3 for optional
adjusting tool, which correctly positions the jet.
Instructions are provided with the tool.
Figure 15
5.3 Media-Air Mixture (media flow) ‒ Figure 16
5.3.1 Check the media stream for correct media-air
mixture; media flow should be smooth and appear as a
light mist coming from the nozzle.
5.3.2 If media does not flow smoothly, loosen the
locking nut and adjust the metering screw until the upper
holes in the metering stem are closed off and the lower
holes are fully open, as shown in Figure 16. This
adjustment is a starting point.
5.3.3 If pulsation occurs in the media hose, either media
is damp and caked, or not enough air is entering the media
stream. While blasting, loosen the locking nut and slowly
turn the adjusting screw out (counterclockwise when
viewed from the top) until the media flows smoothly.
Tighten the locking nut finger-tight to maintain the setting.
Figure 16
5.3.4 If media flow is too light, decrease air in the
mixture by turning the metering screw in (clockwise when
viewed from the top), covering more of the holes so less air
enters the media hose. Tighten the locking nut finger-tight
to maintain the setting.
5.4 Reclaimer Static Pressure
5.4.1 Correct static pressure varies with size of
reclaimer and the size, weight, and type of media.
5.4.2 Adjust static pressure by opening (handle in-line
with air flow) or closing (handle perpendicular to air flow)
When viewed from the knob end,
turn clockwise to increase pressure;
turn counterclockwise to decrease pressure.
Lock Nut
Air Jet
3-1/2 to 4 threads between
lock nut and air jet hex
Push knob in to lock it.
Pull knob out to unlock.
Adjustment Knob
Blast Pressure Regulator
Located on the upper-left side of cabinet.
Adjusting Screw
Locking Nut
Lower holes fully open.
Upper holes
full
y
closed.

BNP® 55 SUCTION BLAST CABINET Page 14
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the dust-collector damper. Refer to the dust-collector
owner’s manual; the damper is located on the inlet on
CDC-1 Dust Collectors, and on the exhauster outlet on
RPC-2 Dust Collectors. If the damper is not opened far
enough, the reclaimer will not remove fines, resulting in
dusty media, poor visibility, and possible media
blockage in the conveying hose. If the damper is opened
too far, it may cause carry over (usable media carried
into the dust collector) and result in excessive media
consumption. Open only as far as necessary to obtain a
balance of dust removal without media carry over.
5.4.3 A manometer is useful when adjusting or
monitoring static pressure. The manometer kit is listed in
Section 9.1: Optional Accessories. Refer to Section 5.8
for manometer operation. The following are static-
pressure starting points for given media. Static pressure
may need to be lower with finer media, higher with
coarser media. Run the media through several blast
cycles, allowing the reclaimer to function with these
settings. Inspect the media in the reclaimer and fines in
the dust collector, as noted in Paragraph 5.4.2. Continue
adjusting static pressure until optimum media cleaning
without carry over is attained.
Glass Bead No. 4 to 7 .................................... 3" – 3-1/2"
Glass Bead No. 8 to 13 .................................... 2-1/2 – 3"
Aluminum Oxide 60-mesh & coarser ..................... 4 – 5"
Aluminum Oxide 80-mesh & finer .................... 2-1/2 – 3"
5.4.4 If the damper has been adjusted and carry over
or excessive dust in the media continues, the optional
externally adjustable vortex cylinder, not available for
300 cfm reclaimers, may help retain media. The vortex
cylinder is usually required only when using 180-mesh
and finer media, or lightweight media. Refer to Section
5.5.
5.5 Optional, Externally Adjustable Vortex
Cylinder
Not available for 300 cfm reclaimer
The externally adjustable vortex is an option when the
cabinet is provided with a CDC-1 Dust Collector. The
vortex is standard with 600 cfm reclaimers when the
cabinet is provided from the factory with an RPC-2 Dust
Collector.
The vortex cylinder fine tunes media separation. Before
adjusting the cylinder, adjust the damper on the dust
collector to increase or decrease static pressure, per
Section 5.4. Once the damper is adjusted, adjust the
cylinder.
5.5.1 The vortex cylinder is located atop the reclaimer
where the flex hose connects. Adjustments are made by
loosening the handle's tensioning knob and moving the
handle to achieve the correct setting. When the correct
setting is established, tighten the locking knob to prevent
movement. Start with the lever slightly to the right (about
1 o’clock, as shown in Figure 17) of the vertical position.
5.5.2 To remove more fines: (Too much dust in
media.) Raise the cylinder by moving the lever left
toward COARSE in 1/4" increments at the indicator
plate. Allow the media to go through several blast cycles
before determining if further adjustment if needed.
5.5.3 To remove fewer fines: (Excessive usable
media is carried to the dust collector.) Lower the vortex
cylinder by moving the lever right toward FINE in 1/4"
increments at the indicator plate. NOTE: If the cylinder is
lowered too far, the reclaimer will again begin to allow
usable media to be carried over, which causes
abnormally high static pressure.
Figure 17
5.5.4 When using media finer than 180-mesh, the inlet
baffle of the reclaimer may need to be removed. Refer to
Section 1.9.6.
5.6 Cabinet Air-Inlet Damper
5.6.1 Once the inlet is initially set, per Section 2.6, it
seldom requires readjustment. The initial setting
produces approximately .5" to .75" of static pressure in
the cabinet enclosure. Do not confuse cabinet static
pressure with reclaimer static pressure, which is
controlled by the dust-collector damper, as noted in
Section 5.4. Reclaimer pressure must be set before
cabinet pressure.
5.6.2 Using a manometer (as noted in Section 5.8 and
listed in Section 9.1) is the most accurate method of
monitoring and adjusting cabinet pressure. Following the
instructions packed with the manometer, start the
exhauster, insert the needle into a glove, and adjust
pressure using the cabinet’s air-inlet damper. Open the
damper farther to decrease static pressure or close it
farther to increase pressure.
Remove more fines
from media by
moving the handle
farther to the left.
Remove fewer
fines by moving
the handle farther
to the right.
Tensioning Knob
Begin with handle at the 1 o’clock position, as shown.

BNP® 55 SUCTION BLAST CABINET Page 15
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5.6.3 If a manometer is not available, use the gloves
as an indicator. With the exhauster ON, the gloves
should be inflated but not elevated off the grate.
5.7 Door Interlocks ‒ Figure 18
WARNING
Never attempt to override the interlock system.
Doing so can result in serious injury from
unexpected blasting.
5.7.1 The door interlocks disable the blasting control
circuit when the doors are open. To enable blasting, the
door-interlock switches must be engaged when the
doors are closed. The interlocks are set at the factory
and do not normally require field adjustment unless
parts are replaced. When adjustment is required,
proceed as follows.
5.7.2 Close cabinet doors.
Figure 18
5.7.3 Loosen the actuator bracket screws and adjusting
screw nut. Move the actuator bracket up or down, and the
adjusting screw sideways, to center the adjusting screw
on the over-travel stop. Tighten the bracket screws.
5.7.4 Turn the adjusting screw in or out as required to
engage the switch without applying excessive pressure
on it. Tighten the adjusting screw nuts.
5.7.5 Test the operation with the doors open and then
closed. Negative pressure inside the cabinet may cause
the doors to flex inward. Tests should be performed with
the exhauster running. Point the nozzle away from the
door during the tests and open the door only enough to
disengage the interlock switch. The interlocks should
stop the blasting when either door is opened and permit
blasting when the doors are closed.
5.8 Optional Manometer
These instructions show several methods of taking
static-pressure readings (negative pressure) on
reclaimers by using a flexible-tube manometer. Use the
method best suited for the application. The instructions
explain the processes for taking periodic readings and
show how to permanently install the manometer for
taking frequent readings. A fitting should be installed when
the manometer installation is permanent, per Paragraph
5.8.6.3. Use silicone or other sealant around the fitting to
prevent leaks. The fitting should be capable of being
capped when the manometer tube is removed. A cap
will prevent leaks that alter the reclaimer’s separation
efficiency. Taking readings at different locations could
produce different readings. Static-pressure readings at
the door are generally 0.5" to 1" lower than readings
taken above the reclaimer. The readings are reference
points, so readings should be taken using the same
method each time a reading is taken.
5.8.1 Refer to instructions packed with the manometer
for preparing and operating the manometer.
5.8.2 Connect one end of the 3/16" ID tubing to one of
the tubing connectors (elbows) at the top of the
manometer by pushing it over the barbed adaptor.
5.8.3 Leave the needle protector on the needle and
insert the needle into the other end of the tubing. The
ends of the tubing must fit tight on the manometer and
needle; leaks will cause inaccurate readings.
5.8.4 Open both manometer valves (elbows), per
manometer instructions.
5.8.5 Magnets on the manometer hold it in position on
the reclaimer or dust-collector body. The manometer
must be vertical so the fluid is level on both sides.
5.8.6 Needle placement: Figure 19 shows the
manometer setup for taking both periodic and frequent
static-pressure readings.
5.8.6.1 Taking readings in the flex hose: Remove the
needle protector and insert the needle into the flex hose,
approximately 8" above the top of the reclaimer.
Cabinet Doo
r
Detent Sleeve
Over-Travel Stop
Loosen nut and move adjusting
screw sideways to center the
screw on the over-travel stop.
Adjusting Screw Nut
Loosen the bracket screws and
move the bracket up or down to
center the adjusting screw on the
over-travel stop.
Actuator Adjusting Bracket
Bracket Screws
A
djust the screw to push the
valve stem (over-travel stop)
in when door is closed.
Adjusting Screw

BNP® 55 SUCTION BLAST CABINET Page 16
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5.8.6.2 Taking readings at the reclaimer door: Open
the reclaimer fill door, remove the needle protector, and
place the needle so the tip is inside the door opening.
Carefully close the door on the needle. The side of the
needle will embed into the rubber, creating an airtight seal.
5
8
7
6
4
3
2
1
4
3
2
1
0
8
7
6
5
5
8
7
6
4
3
2
1
4
3
2
1
0
8
7
6
5
5
8
7
6
4
3
2
1
4
3
2
1
0
8
7
6
5
Figure 19
5.8.6.3 Taking frequent readings using a permanent
fitting: A permanent fitting may be installed in the
reclaimer wall, as shown in Figure 19, for taking frequent
static-pressure readings. Permanent fittings must have a
barb to accommodate the 3/16" ID tubing and have a
means of sealing the fitting when the manometer is not
in use. Use silicone sealer or other sealant to seal
around the fitting to prevent leaks. The fitting should be
capable of being capped when the manometer tube is
removed. Sealing the fitting will prevent leaks that alter
the reclaimer’s separation efficiency. Air drawn into the
reclaimer will cause carry over of good media to the dust
collector.
5.8.7 Adjust the slide rule to align the zero with the
fluid level. Refer to the upper part of Figure 20.
5.8.8 Open cabinet doors and turn the exhauster ON.
The negative (static) pressure will move fluid in the tube.
NOTE: Readings must be taken with the cabinet
doors open and with the exhauster running.
Figure 20
5.8.9 To find the static pressure, add the number of
inches the fluid travels up one column to the inches the
fluid travels down the other column. Refer to the
example in Figure 20.
5.8.10 After taking the readings, replace the needle
protector. Close the manometer valves and store the
manometer in the original container in a clean area.
NOTE: If the manometer installation is permanent, the
manometer may remain on the reclaimer body after the
valves are closed.
The manometer must be vertical when
taking pressure readings.
8"
Some items removed or rotated for clarity.
To obtain the pressure reading: With
the exhauster ON, add the number of
inches the fluid travels up the column
to the inches the fluid travels down
the other column. The total is the
static-pressure reading.
With the exhauster OFF,
slide the rule to align the
zero with the fluid level.
Refer to Paragraph 5.8.6.3
for taking frequent readings.
Install a permanent fitting in
the reclaimer wall just below
the inner cone as shown.
Refer to Paragraph 5.8.6.2
for taking readings at the
reclaimer door. Place the
needle so the tip is inside
the door opening. Carefully
close the door on the needle.
Refer to Paragraph 5.8.6.1 for
taking readings in the flex hose.
Insert the needle into flex hose 8"
above the top of the reclaimer.
In the example shown, fluid traveled up
the right column 1-3/4"
and down the left column 1-3/4".
Static pressure is determined by adding
the reading together. In the example, the
static pressure is 3-1/2".

BNP® 55 SUCTION BLAST CABINET Page 17
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
6.0 PREVENTIVE MAINTENANCE
To avoid unscheduled downtime, establish an inspection
schedule. Inspect all parts subjected to media contact,
including the gun and nozzle, media hose, flex hose,
wear plate, and all items covered in this section. Adjust
frequency of inspections as needed, based on:
 Usage: Frequently used cabinets require more
maintenance and inspections than those
occasionally used.
 Type of media: Aggressive media wears parts
faster than not aggressive media.
 Condition of parts being blasted: Heavily
contaminated parts require more maintenance to the
cabinet’s media recovery system.
 Friability of media: Media that rapidly breaks down
require more maintenance to the cabinet’s media
recovery system and dust collector.
6.1 Daily Inspection and Maintenance Before
Blasting with the Air OFF
6.1.1 Check media level: Check media level in
reclaimer and refill as necessary.
6.1.2 Inspect reclaimer debris screen and door
gasket: Check reclaimer debris screen for debris. The
screen is accessible through the reclaimer door. With
the exhauster OFF, remove the screen and empty it
daily or when loading media. Empty the screen more
often if part blasted causes excessive debris. Do not
operate the machine without the screen in place;
oversized byproduct from blasting could plug the nozzle.
While the door is open, inspect the door gasket for wear
or damage. Replace the gasket at the first sign of wear.
6.1.3 Drain compressed-air filter: The cabinet is
equipped with a manual-drain air filter. Drain the filter at
least once a day and more often if water is present.
Moist air inhibits the flow of media. Drain the air line and
receiver tank regularly. If the filter does not remove
enough moisture to keep media dry and flowing, it may
be necessary to install an air dryer or aftercooler in the
compressed-air-supply line.
6.1.4 Inspect dust container: Refer to the dust-
collector owner’s manual and empty dust containers.
Adjust schedule based on refill rate.
6.2 Daily Inspection During Blasting – Have
Someone do the Following:
6.2.1 Inspect cabinet for dust leaks: During
operation, inspect cabinet door seals for media leaks.
Dust leaking from the inlet damper or other places on
the cabinet indicates saturated filter cartridge. Refer to
the dust-collector owner’s manual.
6.2.2 Check exhaust air for dust: Dust discharge at
the dust-collector outlet indicates a leaking or damaged
filter cartridge. Check immediately. Note that a small
amount of dust egress is normal for a short time when
the cartridge is new before it is seasoned.
6.2.3 Drain pulse reservoir: Refer to the dust-
collector owner’s manual and drain the pulse reservoir
(manifold) at the end of each shift.
6.2.4 Cartridge pulsing: Refer to the CDC-1 Dust-
Collector manual for pulsing instructions and pulse the
cartridge at least every half hour of blasting and before
turning OFF the exhauster. Dusty blasting conditions will
require more frequent pulsing. RPC-2 and RPH-2 Dust
Collectors are automatically pulsed at timed intervals.
6.3 Weekly Inspection and Maintenance Before
Blasting with Air OFF
6.3.1 Inspect view-window cover lens: Inspect the
window cover lens and replace as needed, per Section
7.3.
6.3.2 Inspect gloves: Inspect gloves for wear. The
first sign of deterioration may be excessive static
shocks. Replace as needed, per Section 7.1.
6.3.3 Inspect BNP® gun Assembly: Inspect internal
parts of the BNP gun for wear. Inspection and
replacement of the air jet cover before it wears through
will prolong the life of the jet. Replace parts as needed,
per Section 7.2.
6.3.4 Inspect media hose: Inspect media hose for
thin spots by pinching it every 6 to 12 inches. Replace
the hose when it becomes soft.
6.4 Weekly Inspection During Blasting – Have
Someone do the Following:
6.4.1 Inspect flex hoses: Inspect flex hoses for leaks
and wear.

BNP® 55 SUCTION BLAST CABINET Page 18
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
6.5 Monthly
6.5.1 Reclaimer wear plate and liners: Remove the
flex hose from the reclaimer inlet and use a light to
inspect the reclaimer wear plate or optional rubber
reclaimer liners for wear. If the rubber is worn through to
the backing metal, replace wear plate per Section 7.8 or
rubber liners per Section 7.9, as necessary.
6.6 Dust Collector
Reverse-pulse dust collectors are covered in a separate
manual. Refer to Section 1.1.1.
7.0 SERVICE MAINTENANCE
WARNING
Prior to doing any maintenance or opening the
dust collector, the employer must meet
required OSHA standards including but not
limited to 29CFR 1910 for
 Appropriate Respirator
 Protective Clothing
 Toxic and Hazardous Substances
 Fall Protection
 Lockout and Tagout Procedure
All dust is hazardous to breath; toxicity and
health risk vary with type of dust generated by
blasting. Prolonged exposure to any dust can
result in serious lung disease and death. Short-
term exposure to toxic materials, such as lead
dust or dust from other heavy metals and
corrosives, can cause serious injury or death.
Identify all material that is being removed by
blasting and obtain a safety data sheet (SDS)
for the blast media. Waste dust in the collector
can cause serious injury or death through
inhalation, absorption, or ingestion. The
employer shall meet all OSHA requirements,
including but not limited to those for confined
space, combustible dust, fall protection, hazard
communication, and lockout and tagout
procedure for electrical and pneumatic supply.
7.1 Gloves
7.1.1 Special static-dissipating gloves are provided for
operator comfort. It will be necessary to change gloves
periodically as they wear. The first sign of deterioration
may be excessive static shocks.
7.1.2 Band-clamp type: Band-clamp type gloves are
held in place by metal band clamps on the inside of the
cabinet. To replace, loosen the clamps with a
screwdriver, replace the gloves, and tighten the clamps.
7.1.3 Quick-change type, clampless installation:
Quick-change gloves are held in place using spring rings
sewn into the attachment end of the glove. To install,
insert the glove into the arm port so one spring is on the
inside of the port and the other is on the outside,
sandwiching the arm port between both spring rings.
7.2 BNP® Gun Assembly ‒ Figure 21
Figure 21
7.2.1 Replace the nozzle when its orifice diameter has
worn 1/16" larger than its original size or when suction
diminishes noticeably. To change the nozzle, unscrew
the holding nut from the gun end and pull the nozzle
from the gun. Inspect the nozzle O-ring and replace if
worn or damaged. Inspect the air jet cover; replacing it
before it wears through will prolong the life of the jet.
Insert a new O-ring and nozzle, placing the tapered end
toward the jet. Screw the holding nut onto the gun.
7.3 View-Window Cover Lens
7.3.1 Rapid frosting of the view window can be
avoided by directing ricocheting media away from the
window and by installing a cover lens on the inside
surface of the window. Using cover lenses prolongs the
life of the view window.
7.3.2 The best way to install a cover lens is to remove
the window from the cabinet. If, for some reason, it is not
practical to remove the window, the lens may be applied
with the window glass in place.
7.3.3 To install a cover lens, carefully remove the
adhesive backing making sure the adhesive remains on
the lens and apply the lens to the clean, dry, inner
surface of the view window. When the cover lens
becomes pitted or frosted, replace it.
The wider, tapered end of the
nozzle inserts into the gun.
O-Ring
Media Hose
Air Jet Cover
Nozzle
Nozzle Holding Nut
Air Hose

BNP® 55 SUCTION BLAST CABINET Page 19
© 2019 CLEMCO INDUSTRIES CORP.  www.clemcoindustries.com  Manual No. 23350, Rev G, 02/19
7.4 View-Window Replacement
WARNING
Do not use plate glass for replacement view
windows. Plate glass shatters on impact and
can cause severe injury. Use only genuine
ZERO® laminated replacement glass.
7.4.1 Remove the two window-frame nuts located on
the upper edge of the window frame and swing the
window frame open. If the frame is to remain open, for
cleaning or other reasons, remove it, per Section 7.6.
7.4.2 Remove the old window.
7.4.3 Inspect the window-frame gaskets on both the
window frame and on the cabinet. If either gasket is
damaged, replace it, per Section 7.5.
7.4.4 Install a view-window cover lens, per Section
7.3.
7.4.5 Set the new window (cover lens down) squarely
over the window opening, making sure that all edges of
the window are centered and overlapping the window
gasket, and that the window is resting on the lower
support tabs.
7.4.6 Swing the window frame into place and tighten
the frame nuts.
7.5 Window-Gasket Replacement ‒ Figure 22
7.5.1 Inspect the gaskets when changing the view
window. Replace the window-frame gasket and cabinet-
window opening gasket at the first sign of media leakage
around the view window, or if gaskets are worn or
otherwise damaged.
7.5.2 Remove the window and window frame, per
Section 7.6.
7.5.3 Remove all the old gasket material and clean
the surfaces of the cabinet and window frame.
7.5.4 Peel a short section of adhesive backing from
the 5/16-thick strip gasket and adhere the gasket to the
center of the top edge of the window opening, as shown
in Figure 22. Peel additional backing as needed and
work the strip around the radius of each corner, pressing
it firmly to bond. Trim the gasket to fit and compress the
ends to seal.
7.5.5 Using 5/32-thick strip gasket, repeat the
process on the underside of the window frame.
Figure 22
7.5.6 Trim around the window-frame bolt slots as
needed.
7.6 Window-Frame Removal ‒ Figure 23
7.6.1 Remove the two window-frame nuts located on
the upper edge of the window frame and swing the
window frame open.
7.6.2 Remove the window to prevent breakage.
Figure 23
7.6.3 Pivot the window frame up or down until tension
is off the frame hinges.
7.6.4 To remove, slide the frame to the right. The
hinges separate, as shown in Figure 23.
Cabinet Front
5/16 x 3/4 Gasket
Pivot the frame up or down
until tension is removed
from the hinges.
Support Tabs
Support Tabs
Window Frame
5/32 x 3/4 Gasket
Slide the frame to the right
to separate the hinges.