Parr Instrument Series 4558 - Manual (Page 21)

4555 - 58 Series
5G & 10L Pressure Reactors
- 20 -
Air Motor
Variable stirring speeds from 100 to 2000 rpm can be obtained by replacing the standard
motor with a 1678HC air motor. This motor operates on compressed air which must be
supplied at 20 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
heater and connect 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 continuous 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 airline 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. 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 directions given in the instruction sheet published by the Gast
Manufacturing Corp., Benton Harbor, Michigan.
Variable Speed Electric Motor
Reactors are normally equipped with a DC variable speed motor supplied and controlled
through the 4848M/A3600HC_Series controller. Instructions for connecting and operating
these motors are included in the controller Instruction Manual No. 548M. This motor is
usually installed in a drive system designed to produce stirring speeds up to 1700 rpm.
Spare Parts Kit
Parr can furnish spare parts kits for these reactors which will provide a reserve supply of
parts and tools sufficient to handle most normal replacements and emergency repairs during
a year of heavy usage. These kits contain replacement gaskets, packing, O-rings, shafts,
bearings, and rupture discs. They can be ordered from any Parr Dealer or direct from Parr
Instrument Company. The order must specify the reactor size and indicate type of rupture
disc, stirrer drive. It is advantageous to provide the serial number stamped on the vessel
head or cylinder.