Parr Instrument Series 4560 - Manual (Page 13)

Mini Bench Top Reactors
w w w . p a r r i n s t . c o m 13
Air Motor
Variable speeds from 100 to 2000 rpm with no spark
hazard can be obtained by replacing the standard
motor with an A1393HC air motor assembly. This
motor operates on compressed air which must be
supplied at 40 psig minimum pressure with at least
10 CFM 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 assembly fi rmly on the stand and con-
nect the air hose to a compressed air line. For best
torque and speed control the piping to the motor
should be at least 1/4" IPS or larger. Fill the oiler
with SAE 10 oil and adjust the oiler to feed one drop
per minute into the air stream. For long continu-
ous runs at high speeds the oiling rate should be
increased to three drops per minute.
If the motor becomes sluggish, fl ush it with a non-
fl ammable solvent in a well ventilated area. Dis-
connect the air line and muffl er 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 no further trace of solvent in the exhaust.
If the muffl er felts are dirty, wash them in solvent or
replace them.
Re-lubricate 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 the directions given in the
instruction sheet published by the Gast Manufactur-
ing Corporation, Benton Harbor, Michigan.
Air Motor Option