Gardner Denver 9CDL R Series Service manual

PARTS LIST
OPERATING AND
SERVICE MANUAL
BLOWERS/VACUUM
PUMPS
9
CDL
-
-
R
SE
RIES
37
-
1
-
615
Version 05
August 30, 2018

37-1-615 Page 1
MAINTAIN BLOWER RELIABILITY AND PERFORMANCE
WITH GENUINE GARDNER DENVER
PARTS AND SUPPORT SERVICES
Factory genuine parts, manufactured to design tolerances, are developed for optimum dependability - - -
specifically for your blower. Design and material innovations are born from years of experience with
hundreds of different blower applications. When you specify factory genuine parts you are assured of
receiving parts that incorporate the most current design advancements .manufactured in our state-of-the-
art blower factory under exacting quality standards.
Your AUTHORIZED DISTRIBUTOR offers all the backup you require. A worldwide network of authorized
distributors provides the finest product support in the blower industry.
1. Trained parts technical representatives to assist you in selecting the correct replacement
parts.
2. Complete inventory of new machines and new, genuine factory parts.
3. A full line of factory tested AEON™PD blower lubricants specifically formulated for optimum
performance in all blowers.
4. Authorized distributor service technicians are factory-trained and skilled in blower
maintenance and repair. They are ready to respond and assist you by providing fast, expert
maintenance and repair service.
For the location of your local authorized Gardner Denver blower distributor refer to the yellow
pages of your phone directory, check the Web site at www.gardnerdenver.com or contact:
Gardner Denver Compressor Division
1800 Gardner Expressway
Quincy, IL 62305
Phone: [phone]
Fax: [phone]

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FOREWORD
CycloBlowerâblowers are the result of advanced engineering and skilled manufacturing. To be assured
of receiving maximum service from this machine, the owner must exercise care in its operation and
maintenance. This book is written to give the operator and maintenance department essential information
for day-to-day operation, maintenance and adjustment. Careful adherence to these instructions will result
in economical operation and minimum downtime.
Danger is used to indicate the presence of a hazard which will cause severe
personal injury, death, or substantial property damage if the warning is ignored.
Warning is used to indicate the presence of a hazard which can cause severe
personal injury, death, or substantial property damage if the warning is ignored.
Caution is used to indicate the presence of a hazard which will or can cause
minor personal injury or property damage if the warning is ignored.
NOTICE
Notice is used to notify people of installation, operation or maintenance
information which is important but not hazard-related.

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TABLE OF CONTENTS
Maintain Blower Reliability And Performance...........................................................................................1
Foreword.................................................................................................................................................2
Index.......................................................................................................................................................4
List Of Illustrations...................................................................................................................................7
Safety Precautions..................................................................................................................................8
Introduction Your Key To Trouble Free Service........................................................................................9
Section 1 Equipment Check.....................................................................................................................9
Section 2 Installation..............................................................................................................................10
Section 3 Operation...............................................................................................................................19
Section 4 Maintenance..........................................................................................................................25
Section 5 Parts List................................................................................................................................31
Section 6 Disassembly Instructions........................................................................................................35
Section 7 Assembly Instructions............................................................................................................39
Warranty ...............................................................................................................................................50

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INDEX
9CDL Series,Top Inlet, Main Rotor Drive........16
9CDL Series, Top Inlet, Main Rotor Drive .......15
Altitude...........................................................20
Blower Startup Checklist.................................22
Discharge Piping............................................14
Drive Installation.............................................10
Emergencies..................................................21
Foundations .................................................... 9
Inlet Piping.....................................................13
Introduction ..................................................... 7
Lubricant
Recommended Lubricant............................23
Lubrication......................................................23
Maintenance
Air Filters And Filter Silencers.....................25
Bearing Oil Seals........................................27
Blower Overhaul .........................................28
Discharge Silencer......................................27
Dry Type Filter And Filter Silencer...............27
Oil Wetted Filter Silencer.............................26
Periodic Inspections....................................28
Repair Parts................................................28
Rotor Shaft Seals........................................27
Some Common Causes Of Blower Failure ..28
Maintenance...................................................23
Operating Principle.......................................... 8
Operating Temperature ..................................20
Outline Drawings............................................15
Safety Devices
Check Valve...............................................13
Relief Valve................................................13
Safety Devices...............................................13
Safety Precautions...........................................6
Section 1..........................................................7
Equipment Check.........................................7
Section 2..........................................................8
Installation....................................................8
Section 3........................................................17
Operation...................................................17
Section 4........................................................23
Maintenance...............................................23
Section 5........................................................29
Parts List....................................................29
Section 6........................................................33
Disassembly Instructions............................33
Section 7........................................................37
Assembly Instructions.................................37
Speed............................................................20
Starting Blower
Daily Check................................................17
Prestart-Check ...........................................17
Starting Blower...............................................17
Storage............................................................7
Ventilation......................................................14
Warranty........................................................50

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LIST OF ILLUSTRATIONS
FIGURE 2-1 –OPERATING PRINCIPLE.............................................................................................................................. 10
FIGURE 2-2 –ACCESSORIES AND SAFETY DEVICES..................................................................................................... 11
FIGURE 2-3 - BELT DRIVE OVERHUNG LOAD CALCULATIONS...................................................................................... 14
FIGURE 2-4 –OUTLINE DIMENSIONS ............................................................................................................................... 17
FIGURE 2-5 –OUTLINE DIMENSIONS (CONTINUED)....................................................................................................... 18
FIGURE 3-1 –MAXIMUM RATING....................................................................................................................................... 19
FIGURE 3-2 –WATER QUALITY REQUIREMENTS............................................................................................................ 20
FIGURE 3-3 –LIQUID RATE................................................................................................................................................ 21
FIGURE 3-4–INLET WATER INJECTION DIAGRAM.......................................................................................................... 21
FIGURE 3-5 –ALTITUDE –PRESSURE/VACUUM ............................................................................................................. 22
FIGURE 3-6 –MINIMUM SPEED, MAXIMUM PRESSURE OR VACUUM........................................................................... 23
FIGURE 4-1 –AEON PD SYNTHETIC LUBRICANT........................................................................................................... 25
FIGURE 4-2 –SYNTHETIC LUBRICANT CHART............................................................................................................... 26
FIGURE 4-3 –NON-SYNTHETIC LUBRICANT CHART....................................................................................................... 26
FIGURE 4-4 –OIL BATH FILTER......................................................................................................................................... 28
FIGURE 4-5 –OIL WETTED FILTER-SILENCER ................................................................................................................ 28
FIGURE 4-6 –DRY TYPE FILTER AND FILTER-SILENCER............................................................................................... 29
FIGURE 6-1 –ADAPTOR PLATE..........................................................................................................................................35
FIGURE 6-2 –ADAPTOR PLATE..........................................................................................................................................35
FIGURE 6-3–SPANNER WRENCH......................................................................................................................................35
FIGURE 6-4 –ADAPTOR PLATES .......................................................................................................................................35
FIGURE 6-5 - PULLER..........................................................................................................................................................36
FIGURE 6-6 - ALTERNATE ADAPTOR PLATES ..................................................................................................................36
FIGURE 6-7 - CARRIER FLANGE.........................................................................................................................................37
FIGURE 6-8 - BEARING CLAMP PLATE SHIM.....................................................................................................................37
FIGURE 6-9 - PULLER..........................................................................................................................................................37
FIGURE 6-10 - ROTOR SLING REMOVAL...........................................................................................................................39
FIGURE 6-11 - JACK SCREWS ............................................................................................................................................39
FIGURE 7-1 –ROTOR SHAFT SEALS ................................................................................................................................ 40
FIGURE 7-2 –BEARING SPACERS .................................................................................................................................... 40
FIGURE 7-3 –DISCHARGE OPENING................................................................................................................................ 40
FIGURE 7-4 –LOWER THE GATE ROTOR INTO THE HOUSING ASSEMBLY.................................................................. 40
FIGURE 7-5 –ANGULAR CONTACT BEARING ASSEMBLY.............................................................................................. 41
FIGURE 7-6 –BEARING INSTALLATION........................................................................................................................... 41
FIGURE 7-7 –DISCHARGE END BEARING CARRIER....................................................................................................... 42
FIGURE 7-8 –ROTOR END CLEARNACE CHART (UNIT COLD)....................................................................................... 42
FIGURE 7-9 –DEPTH MICROMETER - ROTOR LOBES .................................................................................................... 42
FIGURE 7-10 –OUTSIDE MICROMETER - THICKNESS OF SHIMS.................................................................................. 42
FIGURE 7-11 –DISCHARGE OPENING & DOWEL PINS................................................................................................... 43
FIGURE 7-12 –DIAL INDICATOR........................................................................................................................................ 43
FIGURE 7-13 –SEAL INSTALLATION GUIDE..................................................................................................................... 44
FIGURE 7-14 –PROTECTIVE INSTALLATION SLEEVES OVER EACH SHAFT................................................................ 44
FIGURE 7-15 –MICROMETER - THICKNESS OF SHAFT SHIM SET ................................................................................ 45
FIGURE 7-16 –SHAFT EXTENTION ................................................................................................................................... 45
FIGURE 7-17 –BEARING PRESS PLATES......................................................................................................................... 46
FIGURE 7-18 –BEARING CLAMP PLATES ........................................................................................................................ 46
FIGURE 7-19 –DISCHARGE OPENING.............................................................................................................................. 46
FIGURE 7-20 –REINFORCING PLATE............................................................................................................................... 46
FIGURE 7-21 –END COVER ASSEMBLY........................................................................................................................... 47
FIGURE 7-22 –BEARING BORE......................................................................................................................................... 48
FIGURE 7-23 –DEPTH MICROMETER - MEASURE DISTANCE TO END OF BEARING SPACER ASSEMBLY............... 48
FIGURE 7-24 –OIL SEAL ON GATE ROTOR SHAFT ASSEMBLY..................................................................................... 48
FIGURE 7-25 –SLIDE SHIMS OVER THE SHAFTS ASSEMBLY........................................................................................ 48
FIGURE 7-26 –PRESS PLATE AND JACK SCREW ASSEMBLY....................................................................................... 49
FIGURE 7-27 –INSTALL HUB & PINION PULL TIGHT WITH LOCKING DEVICE ASSEMBLY .......................................... 49
FIGURE 7-28 –MOUNT INDICATOR AND BUTTON BRACKET ASSEMBLY..................................................................... 49
FIGURE 7-29 –SMALLEST MINUS READING.................................................................................................................... 50
FIGURE 7-30 –SMALLEST PLUS READING ...................................................................................................................... 50
FIGURE 7-31 –SETTING THE INTERLOBE CLEARANCE................................................................................................. 50
FIGURE 7-32 –HOLD GEAR & SHAFT FROM TURNING TIGHTEN FIVE GEAR TO HUB "NYLOK" SCREWS................ 50

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SAFETY PRECAUTIONS
Safety is everybody’s business and is based on your use of good common sense. All situations or circumstances
cannot always be predicted and covered by established rules. Therefore, use your past experience, watch out for
safety hazards and be cautious. Some general safety precautions are given below:
Failure to observe these notices could result in injury to or death of personnel.
·Keep fingers and clothing away from revolving fan, drive coupling, etc.
·Do not use the air discharge from this unit for breathing –not suitable for human
consumption.
·Do not loosen or remove the oil filler plug, drain plugs, covers the thermostatic mixing
valve or break any connections, etc., in the compressor air or oil system until the unit
is shut down and the air pressure has been relieved.
·Electrical shock can and may be fatal.
·Blower unit must be grounded in accordance with the National Electrical Code. A
ground jumper equal to the size of the equipment ground conductor must be used to
connect the blower motor base to the unit base.
·Open main disconnect switch, tag and lockout before working on the control.
·Disconnect the blower from its power source, tag and lockout before working on the
unit –this machine is automatically controlled and may start at any time.
Failure to observe these notices could result in damage to equipment.
·Stop the unit if any repairs or adjustments on or around the compressor are required.
·Disconnect the blower from its power source, tag and lockout before working on the
unit –this machine is automatically controlled and may start at any time.
·Do not exceed the rated maximum pressure values shown on the nameplate.
·Do not operate unit if safety devices are not operating properly. Check periodically.
Never bypass safety devices.

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INTRODUCTION
YOUR KEY TO TROUBLE FREE SERVICE
Although Gardner Denver blowers are sturdy, precision-engineered machines, there are several relatively
simple but basic installation and maintenance procedures that must be observed to assure optimum
performance. As there is no guesswork in the manufacture of these highly advanced units, there must be
none in preparing them to get the job done in the field. It is the purpose of this manual to help you
properly install, maintain and service your Gardner Denver blower. It is important that no section be
overlooked when preparing to install your blower.
Follow the instructions carefully and you will be rewarded with years of trouble-free operation.
SECTION 1
EQUIPMENT CHECK
Before uncrating, check the packing slip carefully to be sure all the parts have been received. All
accessories are listed as separate items on the packing slip, and small important accessories such as
relief valves can be overlooked or lost. After every item on the packing slip has been checked off,
uncrate carefully. Register a claim with the carrier for lost or damaged equipment.
Customers are cautioned to provide adequate protection, warning and safety equipment
necessary to protect personnel against hazards involved in installation and operation of this
equipment in the system or facility.
STORAGE
Your Gardner Denver Blower was packaged at the factory with adequate protection to permit normal
storage for up to six (6) months.
If the unit is to be stored under adverse conditions or for extended periods of time, the following additional
measures should be taken to prevent damage.
1. Store the blower in a clean, dry, heated (if possible) area.
2. Make certain inlet and discharge air ports are tightly covered to prevent foreign material from
entering the air box.
3. All exposed, non-painted surfaces should be protected against rust and corrosion.
4. Provide adequate protection to avoid accidental mechanical damage.
5. In high humidity or corrosive environments, additional measures may be required to prevent
rusting of the blower internal surfaces.
6. To prevent rusting of gears, bearings, etc., the oil reservoirs may be filled with normal
operating oil.
Before running the blower, drain the oil and replace to the proper operating level with clean,
fresh lubricant.
7. Rotate the blower shaft (10 to 25 turns) monthly during storage. Inspect the blower shaft
(near the shaft seal area) monthly and spray with rust inhibitor if needed.
8. For long term storage (over six (6) months), contact Gardner Denver Compressor Division
Customer Service for recommendations.

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SECTION 2
INSTALLATION
FIGURE 2-1 –OPERATING PRINCIPLE
GENERAL –The CycloBlower® is a compact, rotary lobe type axial flow blower/compressor. The
meshing of two screw type rotors synchronized by timing gears provides controlled compression of the air
for maximum efficiency and pulsation-free discharge.
OPERATING PRINCIPLE –Compression is effected by the main (2 lobe) and gate (4 flute) rotors
meshing enclosed in the housing. The timing gears maintain close rotor clearances. The rotors do not
touch each other, the housing, or the bearing carries. Although clearances are small, lubrication in the
compression chamber is not required, insuring oil-free air delivery.
The compression cycle (FIGURE 2-1) begins as the rotors unmesh at the inlet port. Air is drawn into the
rotor cavities, trapped, and compressed by the reducing cavities as rotation continues. When proper
compression is made, the cavities cross the discharge port, completing the cycle. The cycle occurs twice
each revolution of the main bearing rotor and is continuous.
CONSTRUCTION –All models of the 9CDL Series CycloBlower are of similar design and construction
except for rotor length. The housing is a one—piece casting with flanged inlet and discharge openings.
The rotors are ductile iron with integral shaft. Rotors are dynamically balanced for vibration--free
operation. Helical timing gears are of alloy steel, hobbed and shaved for quiet operation.
Two heavy--duty duplex mounted angular contact ball bearings are used on each rotor shaft, at the
discharge end, as fixed bearings to maintain rotor end clearance.
A radial bearing is used on each rotor shaft at the gear end as a floating bearing.
All gears and bearings are oil splash lubricated.
Standard construction is top inlet, bottom discharge, with drive shaft extension from main rotor at the
discharge end. Rotation is clockwise facing the drive shaft. Blowers may be mounted for either V--belt or
direct--coupled drive. The gate rotor speed is half (1/2) the main rotor or drive speed.

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FIGURE 2-2 –ACCESSORIES AND SAFETY DEVICES
LOCATION –Select a clean, dry, well-ventilated area for installing blower and allow ample room for
normal maintenance. Proper ventilation is necessary for blower cooling and cool air intake.
Do not electric weld on the blower or base; bearings can be damaged by the passage of current.
FOUNDATIONS –Correct supporting is important. Distortion by incorrect supporting will affect internal
operating clearances. The foundation or base must provide a level, rigid, nonworking support for the
blower. It must be on uniform and solid footing. Complete foundation design cannot be given because of
varying conditions. If necessary, use shims under feet for leveling to prevent distortion when foundation
bolts are tightened. After installation on the foundation is complete, check alignment of the coupling or
drive before starting blower.
ACCESSORIES (FIGURE 2-2) –The type of service determines the accessory group required. The
typical items are listed as follows:
1. Inlet Filter or Filter-silencer.
2. Flexible Coupling
3. Driver.
4. Simple V-Belt Drive.
5. Jackshaft V-Belt Drive.
6. Bypass Valve.
7. Check Valve.
8. Relief Valve, Vacuum or Pressure.
9. Discharge Silencer.
10. Base Plate.
11. Expansion Joint(s) –Inlet and/or Discharge.
12. Temperature or Pressure Shutdown Switch.
13. Check Valve (Inlet Bypass).
14. Heat Exchanger.
15. Bypass to atmosphere (alternate).
16. Pressure Gauge or Vacuum Gauge.

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Inlet Filter or Filter-Silencer –For pressure service handling air, the blower inlet must be protected by a
filter or suitable size to allow full flow of air to the blower inlet. The filter must be of adequate efficiency to
trap any foreign materials which may be in the general area of the air inlet. If noise is a factor, filter-
silencers are available.
Rotating components will cause severe injury in case of personal contact. Keep hands away
from the blower inlet and discharge ports.
In choosing a location for the filter, consideration should be given to a source of cool, clean air, and most
important, access for maintenance.
Filters generally used for blower service fall under three types:
Oil-wetted Screen Type
Oil Bath
Dry Type
Filter-silencers are also available in the above types.
For vacuum service, the type of system used and materials being handled will determine the necessity for
an in-line filter.
Couplings –For direct-coupled units, a flexible type coupling, accurately aligned, should be used
between the blower and power unit. Misaligned couplings may cause vibration, additional bearing loads
and stresses which will affect life of parts involved. DO NOT drive the couplings on shaft. Check shaft
and coupling bore for burrs. Polish the shaft and bore if necessary for proper fit. Fit keys to keyways.
Check coupling alignment. Exact alignment will vary with the type of couplings; however, it is not
uncommon to hold alignment within .003”in all directions. With lubricated or special couplings, follow the
manufacturer’s instructions for installation and maintenance.
DRIVE INSTALLATION
V-Belt Drive –Follow normal specifications recommended by the belt manufacturers for installation of
belt drive on blowers. To provide the most compact drive, it is suggested the high capacity V-belt drives
be used. Blower shaft and power unit shaft should be parallel, with sheaves aligned on shafts so belts
run true. Use only matched belt sets and replace belts in complete sets only. Belt tension should be
according to manufacturer’s recommendations. Slippage can be detected by belt squeal, overheating or
loss of speed. A few hours after initial starting with new belts, it is advisable to recheck belt tension and
provide tension adjustment as necessary.
Over tightening belts lead to heavy bearing loads and premature failure.
When selecting a V-belt drive, check to be sure the maximum allowable moment limitation is not
exceeded. Refer to FIGURE 2-3, for belt drive overhung load calculations.
NOTICE
When a simple V-belt drive is not available, to stay within the maximum allowable moment, a
jackshaft V-belt drive is required.

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Belt drives must be carefully aligned. Motor and blower pulleys must be parallel to each other and in the
same plane within 1/16 inch. Belt tension should be carefully adjusted and belts tightened only enough to
prevent slippage and per the belt manufacturer’s recommendations.
NOTICE
The sheave should be positioned as close as possible to the drive cover. This will reduce the
overhung load and extend the bearing life.
On direct connected units, alignment and lubrication of the couplings to specifications of the coupling
manufacturer are very important. When mounted drives are supplied from the factory, proper alignment
has been established before shipment. However, during shipping, handling and installation, it is likely
that the alignment has been disturbed and final adjustment must be made before startup.

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FIGURE 2-3 –BELT DRIVE OVERHUNG LOAD CALCULATIONS

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Bypass Valve –Installation of a bypass valve at the blower discharge (FIGURE 2-2) will allow the blower
to be started under no-load. Bypass line may be discharged at atmosphere or to blower inlet depending
on local requirements or material being handled.
Heat Exchanger –When the bypass line discharges to blower inlet, a heat exchanger must be included
in the line between blower discharge and blower inlet, to remove the heat of compression before the gas
is reintroduced into the blower inlet. A check valve (FIGURE 2-2) should also be placed in the inlet line
between the bypass line and the inlet filter or silencer, to prevent discharging backwards through the filter
or silencer.
SAFETY DEVICES –For all installations the following safety devices are a requirement for safe blower
operation. Numbers shown are reference numbers used in FIGURE 2-2.
7. Check Valve, Blower Discharge Line
8. Relief Valve, Vacuum or Pressure
12. High Discharge Air Temperature Switch
Check Valve (FIGURE 2-2) –When the blower is used in a pneumatic conveying system, a check valve
must be used to prevent backflow of material into the blower. In any system it is a safety device
preventing the down stream pressure from motoring the blower through shutdown periods. A check valve
must be provided for each blower when several blowers are manifold into a common system.
Relief Valve (FIGURE 2-2) –The relief valve must be installed as close to blower ports as possible.
There should be no accessories such as valves, check valves, silencers, etc. between the relief valve and
blower ports. It should be set 2 to 3 PSI above normal blower operating pressure (1/2”to 1”Hg. In
vacuum service), but not to exceed 2 PSI above maximum differential pressure rating of the blower for
pressure service.
NOTICE
Relief valves should be placed as close as possible to the blower inlet port (vacuum operation)
or discharge port (pressure operation).
High Temperature and High Pressure Shutdown –All blower installations should be protected with a
high temperature shutdown switch. The controls should be set to stop the blower when the discharge
temperature reaches 355°F or temperature rise reaches 255°F. In some installations a high pressure
shutdown switch may also be advisable. The sensing element of these controls should be installed as
close to the blower discharge as possible. See FIGURE 2-2. On remote or unattended installations
these controls are normally mandatory.
INLET PIPING –During the installation of piping make sure dirt and other foreign materials do not enter
blower openings. When inlet piping is used IT MUST BE CLEAN, AND FREE OF SCALE AND OTHER
FOREIGN MATERIALS WHICH COULD ENTER THE BLOWER. It is suggested that an expansion joint
be installed near blower openings to prevent stressing of the blower housing. Support the pipe to relieve
weight on the expansion joint and the blower. Make sure the pipe size is adequate and as straight as
possible to prevent pressure drop at the blower inlet. Where bends are necessary use long radius
fittings. All connections must be air tight.
For vacuum service, an accurate vacuum gauge must be used near the blower inlet to indicate operating
vacuum and a suitable vacuum relief valve must be used. A vacuum blower in pneumatic conveying
service requires pre-inlet separation and filtering to prevent material carry-over into the blower.
Inlet pipe size is determined as follows:
0 to 10 feet long, use pipe size equal to blower inlet flange size.
10 to 17 feet long, use pipe size larger than blower inlet.
17 to 33 feet long, two pipe sizes larger than blower inlet.

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DISCHARGE PIPING –In general, the type system used will govern the piping arrangement. However,
the following suggestions should be followed for blower protection and efficiency.
An expansion joint should be installed as close to the blower opening as possible to protect the blower
housing from stresses. All pipe connections should be square and even to prevent distortion from
misalignment.
An accurate pressure gauge must be provided near the blower discharge to indicate operation pressure.
If noise level is a factor, a discharge silencer should be used. The discharge line should be as straight as
possible. Where bends are necessary, use long radius fittings. Provision for condensate drainage at the
lowest point in the piping may be required.
VENTILATION –If the blower is to operate in a housing or enclosure, proper ventilation must be provided
for adequate blower cooling. Cooling air should be taken from outside the enclosure.
OUTLINE DRAWINGS –Certified outline drawings are available upon request. All important dimensions
are shown in FIGURE 2-4 & FIGURE 2-5.

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9CDL SERIES, TOP INLET, MAIN ROTOR DRIVE
FIGURE 2-4 –OUTLINE DIMENSIONS

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9CDL SERIES, TOP INLET, MAIN ROTOR DRIVE
MODEL WT. A B
(inches)
C
(inches)
D
(inches)
OUTLINE
DIMENSIONS
DRAWING NO.
9CDL13R 1475 38.56 5 24.16 32.04 301CBP800
9CDL18R 1680 43.56 6.50 29.16 37.04 302CBP800
9CDL23R 1905 48.56 11.50 34.16 42.04 303CBP800
MODEL E –INLET F –DISCHARGE
9CDL13R 8.00 FLANGE, 13.5 O.D., 8 HOLES
.75 –10 UNC TAP, 11.75 DIA. B.C. 8.00 FLANGE, 13.5 O.D., 8 HOLES .75 –10 UNC TAP, 11.75 DIA. B.C.
9CDL18R 10.00 FLANGE, 16 O.D., 12 HOLES
.875 –9 UNC TAP, 14.25 DIA. B.C. 8.00 FLANGE, 13.5 O.D., 8 HOLES .75 –10 UNC TAP, 11.75 DIA. B.C.
9CDL23R 10.00 FLANGE, 16 O.D., 12 HOLES
.875 –9 UNC TAP, 14.25 DIA. B.C. 8.00 FLANGE, 13.5 O.D., 8 HOLES .75 –10 UNC TAP, 11.75 DIA. B.C.
FIGURE 2-5 –OUTLINE DIMENSIONS (CONTINUED)

37-1-615 Page 17
SECTION 3
OPERATION
Future operating problems can be avoided if proper precautions are observed when the equipment is first
put into service.
Before starting under power, the blower should be turned over by hand to make certain there is no
binding or internal contact.
Each size blower has limits on pressure differential, running speed, and discharge temperature which
must not be exceeded. These limits are shown in the following tabulation.
GENERAL –A new blower from the factory must be checked and serviced before operation. The blower
must be lubricated and operated according to the following instructions. Blower failure can be caused by
operation at above rated pressure or below rated minimum speed. Both cause excessive discharge
temperature and seizure of rotating parts.
STARTING BLOWER –Start at reduced speed and no-load if possible. If speed is fixed, start without
load by bleeding discharge to atmosphere. Starting should be smooth and free of vibrations. After initial
no-load start, and operation is satisfactory, apply load gradually until maximum operating conditions are
attained. BE SURE OPERATING CONDITIONS ARE WITHIN BLOWER RATINGS. Maintain a close
check for severe vibrations, unusual noise, leaks and undue heating. The blower will gradually heat up
due to compression, but after a reasonable length of time, temperature will stabilize. With very cold
ambient conditions, warm up blower at no-load before going into full load service.
If the blower is used as part of a specific system, check the system’s manual for any procedures that may
be necessary when starting the blower.
PRESTART CHECK (For New or Overhauled Blower) –see “Blower Startup Checklist,”page 24.
ROTATION –Facing the main rotor drive shaft, rotation is clockwise when the shaft extension is at
discharge end, and counterclockwise when the shaft extension is at the inlet end. An arrow indicating
rotation is attached to the blower end cover near the drive shaft.
DAILY CHECK
1. Air filter tight, clean and serviced.
2. Proper oil level in oil sumps.
3. Observe pressure.
4. Relief valve functions.
5. Blower turns freely.
Over tightening belts lead to heavy bearing loads and premature failure.
R
Series
Models
Drive Shaft
Speed
(RPM)
Discharge
Pressure*
Sea Level (PSIG)
Dry
Vacuum*
(Inches Hg)
Wet
Vacuum*
(Inches Hg)
9CDL13, 9CDL18, 9CDL23 3000 20 17 ----
9CDL13, 8CDL18, 9CDL23 2700 ---- ---- 24
* Pressures or vacuums are gauged at immediate blower discharge or inlet and include inlet and
discharge losses. For booster applications, consult Gardner Denver Compressor Division
Customer Service. For suggested maximum ratings at reduced speeds, See FIGURE 3-6.
FIGURE 3-1 –MAXIMUM RATING

37-1-615 Page 18
TYPE OF SERVICE –The blower can be operated in either pressure or vacuum service.
Pressure –Never operate the blower above the maximum pressure shown in FIGURE 3-1. Excessive
pressure may cause overheating and blower failure, it is therefore most important to have an accurate
pressure gauge in the discharge line as close to the blower discharge as possible. Reduced speeds have
a direct bearing on allowable pressure (FIGURE 3-6). A bypass valve to bleed air from the discharge to
atmosphere (FIGURE 2-2) may be used to control the pressure. NEVER reduce the blower speed to
maintain a certain pressure before it is determined if the reduced speed is adequate for that pressure. An
accurate pressure gauge must be maintained.
Vacuum –The blower may be operated either in dry vacuum or wet vacuum service. Do not operate the
blower above the maximum vacuums shown in FIGURE 3-1, or below the minimum speed shown in
FIGURE 3-6. All vacuum ratings are based on standard atmospheric discharge. An accurate vacuum
gauge and vacuum relief valve must be used as close to the blower inlet as possible.
Wet vacuum service employs a suitable liquid, normally water, injected into the system near the blower
inlet to control temperature rise and increase the degree of vacuum developed. The liquid used MUST
BE clean and free of foreign matter, chemical contaminants and hardness, which may cause corrosion,
deposits, or damage in the rotor chamber. See FIGURE 3-4, for typical installation, and FIGURE 3-2,
for water quality requirements. If the proposed water supply is questionable, or does not meet the water
specification, a reputable water treatment service company should be contacted. They can recommend
treatment and equipment to satisfy this specification.
pH Range at 25° C....................................................... 6.5 –8.0
Conductivity at 25°C (MICROMHO/cm)........................ Less than 250
Total hardness as CaCo3(ppm)................................... Less than 100
Total Alkalinity as CaCo3(ppm).................................... Less than 70
Chloride ion; CI-(ppm)................................................. Less than 30
Sulfate ion SO4–2(ppm)............................................... Less than 50
Total iron; Fe (ppm)..................................................... Less than 0.3
Silica; SiO2(ppm)........................................................ Less than 20
Sulfide ion S-2 (ppm).................................................... 0
Ammonium ion; NH4+ (ppm)........................................ 0
FIGURE 3-2 –WATER QUALITY REQUIREMENTS

37-1-615 Page 19
If the injection water supply is allowed to run after blower shutdown, both the blower and adjacent
discharge piping may fill with water and present a serious overload problem at the next attempted start.
To prevent this, it is strongly recommended that an electric solenoid valve (normally open) be installed at
the lowest point in the discharge elbow and/or connecting piping. The valve will open on blower
shutdown and drain any water which might accumulate in the discharge piping. It is also recommended
that a time delay be used between injection water shutoff and blower/motor shutdown to allow the interior
of the blower to dry out prior to shutdown. Up to five minutes time delay may be required for larger
blowers running under no load.
On wet vacuum service, temperature control and a minimum amount of rotor sealing is obtained with
small quantities (1 gallon per minute) of injected liquid. Best performance is attained by using the amount
of injected liquid that maintains the discharge air temperature in the range of 100°F to 150°F.
The maximum permissible liquid rate on any size machine is shown in FIGURE 3-3. DO NOT EXCEED
THIS.
Liquid Rate
(GPM) 9CDL13 9CDL18 9CDL23
3 3 3
FIGURE 3-3 –LIQUID RATE
In applications where liquid carry-over from the upstream system may exceed these quantities, even for
momentary periods, separation prior to blower inlet must be employed to reduce water flow to this figure
or less.
Where inlet injection of water is used, it may be introduced in any convenient manner. No particular
water pressure is required, only that sufficient to deliver the water to the injection point. A reliable
metering device, such as a rotameter, to indicate water injection rate is supplied.
Since water injection is used primarily for discharge temperature reduction and control, overheating will
occur with water shutoff or supply failure. Provisions against inadvertent water shutoff should be
incorporated in every water-injected blower system.
A high discharge temperature safety shutdown switch should be used to protect the blower.
Individual system requirements will determine whether downstream (discharge side) separation of
injection water may be required. Combination discharge silencers and separators are available.
See Engineering Data Sheet 37-1-432, for complete wet vacuum details.
FIGURE 3-4–INLET WATER INJECTION DIAGRAM