Parr Instrument Series 4590 - Manual (Page 12)

4590 Micro Reactors
P a r r I n s t r u m e n t C o m p a n y 12
Air Motor
Variable stirring speeds from 100 to 2000 rpm
with no spark hazard can be obtained by replacing
the standard motor with an air motor. This motor
operates on compressed air which must be supplied
at 40 psig minimum pressure with at least 10CFM
available at that pressure. It is furnished with a
speed control valve and oiler, all assembled on a
mounting bracket.
To operate reactors equipped with an air motor,
mount the drive system firmly on the stand and con-
nect the air hose to a compressed air line. Fill the
oiler with SAE 10 oil and adjust the oiler to feed one
drop per minute into the air stream. For long con-
tinuous runs at high speeds the oiling rate should
be increased to three drops per minute.
If the motor becomes sluggish, flush it with a
non-flammable solvent in a well ventilated area.
Disconnect the air line and muffler and pour a small
amount of solvent into the inlet port. Rotate the
shaft by hand in both directions for a few minutes;
then connect the air line and run the motor until
there is not further trace of solvent in the exhaust.
If the muffler felts are dirty, wash them in solvent or
replace them. Relubricate the motor with a squirt of
oil into the chamber and reassemble.
If it becomes necessary to disassemble the motor
to replace the vanes, follow directions given in the
instruction sheet published by the Gast Manufactur-
ing Corp., Benton Harbor, Michigan.
Air Motor Option