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Watson-Marlow Bredel E-Manuals
file://M:\staging\pdfs-global\m-521-cc-gb-03.htm
11 Air motors
The air motor is designed for air only. Do not allow corrosive,
flammable or explosive gases or particulate material to enter the
motor. Water vapour, oil-based contaminants or other liquids must
be filtered out. The recommended air pressure should not exceed
7bar (100 psig) maximum.
Always disconnect the air supply before servicing.
11.1 Air motors: installation
The air motor is supplied with a silencer installed. The silencer incorporates a speed limiter.
Install a moisture trap and filter in the air line ahead of the motor. If condensates need to
be flushed out of the motor, use clean, dry air at low pressure. For efficiency of output and
speed control, use air lines of the same size or next pipe size larger than the intake port of
the motor.
A four-way valve which can be connected by piping to both air ports of the motor will make
reversing possible. Use a pressure regulator or a simple shut-off valve to obtain the desired
power and conserve air to regulate speed and torque. The motor should be regulated to
run at no more than 3000rpm.
The air motor should be mounted on a solid baseplate, preferably of metal, which in turn
should be anchored to a shelf, floor or other machinery.
11.2 Air motors: lubrication
Use a detergent SAE#10 automotive engine oil. Lubrication is necessary for all moving
parts and rust prevention. We recommend that an automatic air lubricator be installed in
the air line just ahead of the motor.
Automatic lubrication: An in-line oiler should be adjusted to feed one drop per minute for
high speed or continuous duty use. Do not overfeed oil. Contamination of the exhaust air
may occur.
Manual lubrication: Shut the pump down after every eight hours of operation, and add
10-20 drops of oil through the inlet port.
Page 17 of 47
14/12/2009
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