Parr Instrument 4575/76 HP/HT - Manual (Page 11)

w w w . p a r r i n s t . c o m
4575/76 HP/HT Pressure Reactors
11
Air Motor
Variable stirring speeds from 300 to 2000 rpm with
no spark hazard can be obtained by replacing the
standard motor with an air motor. This motor oper-
ates on compressed air which must be supplied
at 40 psig minimum pressure with at least 20CFM
available at that pressure. It is furnished with a
speed control valve, oiler, and muffler.
To operate reactors equipped with an air motor, 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. Dis-
connect 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 no further trace of solvent in the exhaust.
If the muffler 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.
2563HC2
Air Motor Option