Adjusting Belt Tension
Proper belt tension and pulley alignment must be maintained for maximum drive efficiency and for maximum belt
life. The correct tensions exists if a deflection of ½ inch occurs by placing 10lbs of force midway between the motor
pulley and the compressor flywheel. This deflection can be adjusted by the following procedure. The pulley should be
carefully aligned with the flywheel and set screws should be kept tight.
1. Remove the belt guard
2. Loosen the motor mounting bolts
3. Shift the motor to the point where the correct deflection exists
4. Retighten the motor mounting belts
5. Check to ensure that the tension remain correct
after tightening
6. Re-install the belt guard. All moving parts must
be guarded
NOTE: Drive belt tension and pulley alignment are done at the same time. They are discussed separately for clarity.
Description of Compressor
WHAT IS A RECIPROCATING COMPRESSOR?
A reciprocating compressor is a piston type pump which develops pressure from the action of a piston moving
through a cylinder. The cylinder, or cylinders, may be vertical, horizontal or angular.
When air is drawn in from the atmosphere and compressed to its final pressure in a single stroke, the compressor is
referred to as a “single stage” pump. Single stage units normally are used in the 90 to 125psi range and are available
as single or multi-cylinder (twin cylinder) compressors.
When the air drawn from the atmosphere is compressed first to an intermediate pressure, and then further
compressed to a higher pressure, it is done in a “two stage” pump. These cylinders are unequal in size and the first
stage always takes place in the larger, low pressure cylinder. From there it passes through the inner cooler to the
smaller, high pressure cylinder. The cycle is completed as the air then moves through the after cooler and discharge
line into the tank. Two stage compressors are generally used for pressure ranges from 100 to 175 PSI and deliver
more air per horsepower at these pressures. This increase in efficiency is partially due to the heat dissipated as the air
passes through the inner cooler.
Description Of Cooling
Our compressors are cooled by fan blades, incorporated into the driven sheave (pulley), blowing air across the
intercooler, after cooler, and cylinder head.
Description Of Controls
Stop/Start Receiver or plant air system pressure is controlled within limits by a pressure switch
automatically stopping and starting the compressor as the air pressure reaches a maximum preset
pressure (cut out) and then drops to a minimum presser pressure (cut in).
Industrial Gold Air Compressors
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800-531-9656 | www.industrialgold.com
G43 Pump
