Document No 7209-D0001-10
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INSTALLING THE COMPRESSOR UNIT.
The compressor is a rotary screw type driven by a diesel engine. Compression occurs when inlet air
(at normal atmospheric pressure) enters a chamber where it is trapped between the rotating rotor
lobes. A lubricated pitch line provides sealing. As the lobes mesh, they reduce the volume of the air,
compressing it to the desired pressure.
The system has a two-stage air/oil separator. The first separation stage consists of baffles, which
perform mechanical separation. The second stage uses a special separation element, which
delivers dry air to the outlet. The second stage is a spin-on type coalescing filter.
Pressure regulation is achieved by adjusting the pressure regulator valve mounted in front of the
compressor (Gold adjustable valve). The system pressure is pre-set at 150 psi. To reduce the
pressure, either adjust the regulating valve or use a Filter Regulator Lubricator (FRL) to achieve the
final tool pressure.
The compressor air intake is protected by a paper-type replaceable air filter, and a spin-on type oil
filter for the oil side and a coalescing filter for final oil removal from the air.
Safety features included in the compressor are:
200 PSI relief valve in separation manifold,
Blow-down valve to discharge system pressure on shutdown,
Over temperature safety sensor in the compressor oil,
Over pressure mounted at the minimum pressure valve,
Do not disable or bypass the over-temperature shutdown circuits. Failure of
the shutdown system could result in equipment damage, injury or death.
A liquid-to-liquid air cooler with thermo bypass valve maintains operating temperatures in an optimal
performance range. This helps to increase system durability and reduces the temperature of the
compressed air.
