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3 air motors: operation 11.4 air motors: starting, 5 air motors: shutdown procedure – Watson-Marlow 521CC User Manual

Page 18

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11.3 Air motors: operation

11.4 Air motors: starting

Starting torque is less than running torque. It could vary depending on where the vanes
stop in relation to the air intake port. To regulate speed and torque, use a pressure
regulator or simple shut-off valve to obtain desired power and conserve air.

11.5 Air motors: shutdown procedure

Turn off the air supply and remove the air lines from the motor.

Use clean, dry air at low pressure to flush out condensates such as water.

Re-lubricate the air motor with a squirt of oil in the chamber. Rotate the shaft by hand
several times.

Plug or cap each port.

11.6 Air motors: Air motor specifications

11.7 Air motors: troubleshooting

Do not drive an air motor with flammable or explosive gases nor operate
the unit in an atmosphere containing them. Solid or liquid material
leaving the motor can cause eye or skin damage. Keep away from the air
stream. Do not drive an air motor in excess of the recommended speed,
which is governed by a limiter on the outlet port. Do not allow an air
motor to run at high speed with no load: excessive internal heat build-up,
loss of internal clearances and rapid motor damage will result.

Maximum
speed

Maximum
pressure

Maximum
torque

Maximum air
consumption

Total internal
end clearance

Total top
clearance

3,000rpm 7.0bar,

100psig

26Nm,
19.2 lb-ft

14.15 l/s, 30cfm 0.0635mm,

0.0025in

0.0381mm,
0.0015in

Reason

Low

torque

Low

speed

Won't

run

Runs

hot

Runs well then

slows down

Dirt, foreign material

Internal rust

Misalignment

Insufficient air
pressure

Air line too small

Restricted exhaust

Poor lubrication

Jammed machine

Compressor too small

Compressor too far
from unit

Page 18 of 47

Watson-Marlow Bredel E-Manuals

14/12/2009

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