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Watson-Marlow Bredel E-Manuals
file://M:\staging\pdfs-global\m-521-cc-gb-03.htm
11.3 Air motors: operation
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.
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
Maximum
Maximum
speed
pressure
3,000rpm
7.0bar,
100psig
11.7 Air motors: troubleshooting
Reason
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
Maximum
Maximum air
torque
consumption
26Nm,
14.15 l/s, 30cfm
19.2 lb-ft
Low
Low
Won't
torque
speed
run
Page 18 of 47
Total internal
Total top
end clearance
clearance
0.0635mm,
0.0381mm,
0.0025in
0.0015in
Runs
Runs well then
hot
slows down
14/12/2009
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