
OPERATING MANUAL
AIR-POWERED
PUMP DRIVES
Model No.
7569-00
Cole-Parmer Instrument Co.
625 East Bunker Ct.
Vernon Hills, Illinois U.S.A. 60061-1844
800-MASTERFLEX (627-8373)
(847) 247-2929 FAX
www.masterflex.com
e-mail: techinfo@coleparmer.com
A-1299-0105
Edition 07
®
®

WARNING: PRODUCT USE LIMITATION
This product is not designed for, nor intended for, use in
patient-connected applications; including, but not limited to, medical and
dental use, and, accordingly, has not been submitted for FDA approval.
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Trademarks bearing the ® symbol in this publication
are registered in the U.S. and in other countries.

EU Declaration of Conformity
Name of Apparatus: MASTERFLEX®Air-Powered L/S®Drive with Pump Head
Model Number: 77931-10
Description of Apparatus: Peristaltic Pump Motor Drive and Pump Head. Used to
Barnant Company declares that the above model is in conformity to the following
harmonized standards and directives:
Applicable Applicable Manufacturer’s
Directive Specifications Report Number
89/392/EEC EN 292-1: 1991 TR9525
91/368/EEC EN 292-2/A1: 1995
93/44/EEC
93/68/EEC
pump fluids.
Manufacturer: Barnant Company Division
Manufacturer’s Signature:
James W. Doll Date
Vice President, Engineering
Cole-Parmer Instrument Company
28W092 Commercial Avenue
Barrington, IL 60010-2392
USA
Tel.: 847-381-7050
25 August, 2000
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SETUP AND DRIVE OPERATION
INTRODUCTION AND GENERAL DESCRIPTION
This air-powered pump drive, when used with a MASTERFLEX®L/S®Pump Head, is
an excellent variable-flow pump for hazardous-duty applications, when properly
grounded, or when electrical power is not available.
VARIETY OF PUMP HEADS ACCEPTED
Mount up to 2 MASTERFLEX®L/S®Pump Heads and all MASTERFLEX®L/S®compatible Pump Heads. See individual Pump Heads for flow rates.
SETUP AND DRIVE OPERATION
1. Unpack the drive. Save packing material until proper product operation has
been verified.
2. Install pressure gauge, pressure regulator/lubricator/filter assembly (B, C) and
muffler (D). See Figures 1 and 2 for proper orientation. (All items and fittings
included.) Use thread seal for all connections to reduce the possibility of air
leakage.
3. Connect compressed air line to 1/4 NPT(F) connection on regulator (or use
adapter for 3/16 in ID hose provided).
4. Mount Pump Head and load tubing. (See Pump Head manual.)
5. Turn on compressed air line to start pumping (maximum: 150 psig [10.3 bar]
inlet).
6. Adjust flow rate with the adjustment knob on top of the regulator.
Vary flow rate from 1 to 25 psig (0.07 to 1.72 bar). (Lock flow rate by using
snap-action push-pull knob.)
CAUTION: Ensure that pump speed does not exceed 600 rpm. Speeds
higher than 600 rpm may damage pump.
7. For continuous-duty or high-speed applications, use of the lubricator is
recommended. Adjust the lubricator with the adjustment knob on top.
For higher speeds, set lubricator to provide 1 to 3 drops per minute. Use a lower
setting for lower speeds. See MAINTENANCE for RECOMMENDED LUBRICANTS.
(Lock lubrication rate by using snap-action push-pull knob.)
Fig. 2 Top view of driveFig. 1 Front view of drive
A. Pump Head Mounting Holes
B. Filter/Regulator Control Knob
C. Lubricator Control Knob
D. Muffler
E. Air Motor

MAINTENANCE
Low speed
gear assem
(included
in service
07553-08)
Gasket
Gear case
cover assembly
High-speed unit gear
assembly (included
in service kit
07553-06)
The air motor is a rotary vane type motor. Lubrication is necessary for the bearings,
shaft seals and rust prevention.
Excessive moisture in the air line can cause rust formation in the motor and can
cause ice to form in the muffler due to expansion of air through the motor.
RECOMMENDED LUBRICANTS
Use a misting type oil rated 50 to 200 SSU (ISO Grade 7 to 46) at 100˚F (38˚C).
Unscrew the bowl to fill the lubricator. Press up on the bottom drain to empty bowl.
CLEANING
Keep the drive enclosure clean with mild detergents. Never immerse nor use
excessive fluid.
GEAR REPLACEMENT
A plastic intermediate gear protects the drive system from torque overloads. To
replace gear (see Figure 3):
1. Disconnect from compressed air supply.
2. Remove housing.
3. Remove front mounting plate.
4. Replace gear or gear/shaft assembly. See REPLACEMENT PARTS AND
ACCESSORIES.
5. Reassemble in reverse order.
Fig. 3 Gear Replacement
DRAIN OPERATION
The filter/regulator assembly has a manual drain. Check it frequently for water
accumulation. Open drain by pressing up on bottom of bowl.
TROUBLESHOOTING
If drive does not operate, disconnect power and
a. Check pump head for tubing jam.
b. Check air supply.
c. Check drive gear for stripping.
Contact your dealer for further service needs.
REPLACEMENT PARTS AND ACCESSORIES
07553-06, Gear Service Kit, High-speed units
07553-09, Gear only, High-speed units
07055-50, Replacement air motor
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SPECIFICATIONS
Output Speed: 60 to 600 rpm
Maximum Load: 180 oz•in (13 kg•cm)
Regulation: ± 15 rpm (60 to 150 rpm)
± 20 rpm (150 to 600 rpm)
Power Input: 10 cfm (0.28 m
3
/min) @ 150 psig
(10.3 bar)
Power Output: 3/4 hp (560 W)
Operating Temperature: 32˚ to 104˚F (0˚ to 40˚C)
Storage Temperature: 14˚ to 149˚F (–10˚ to 65˚C)
Humidity (non-condensing): 10% to 90%
Chemical Resistance: Exposed materials are painted
CRS, brass, aluminum and plastic
Enclosure Rating: NOT APPLICABLE
Altitude: Less than 2000 m
Dimensions (L W H): 9-7/8 in 4-13/16 in 8-13/16 in
(251 122 224 mm)
Weight: 14 lbs (6.35 kg)
Compliance (for CE Mark): EN 292-1: 1991 and
EN 292-2/A1: 1995 (EU Machine
Directive)

WARRANTY
Use only MASTERFLEX precision tubing with MASTERFLEX pumps
to ensure optimum performance. Use of other tubing may void
applicable warranties.
The Manufacturer warrants this product to be free from significant deviations from
published specifications. If repair or adjustment is necessary within the warranty
period, the problem will be corrected at no charge if it is not due to misuse or
abuse on your part, as determined by the Manufacturer. Repair costs outside the
warranty period, or those resulting from product misuse or abuse, may be invoiced
to you.
The warranty period for this product is noted on the Warranty Card.
PRODUCT RETURN
To limit charges and delays, contact the seller or Manufacturer for authorization and
shipping instructions before returning the product, either within or outside of the
warranty period. When returning the product, please state the reason for the return.
For your protection, pack the product carefully and insure it against possible damage
or loss. Any damages resulting from improper packaging are your responsibility.
TECHNICAL ASSISTANCE
If you have any questions about the use of this product, contact the Manufacturer
or authorized seller.
Printed in U.S.A.
8
070900