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DESCRIPTION OF COMPONENTS
AUTOMATIC BLOW DOWN VALVE
There is one blow down valve in the compressor system. It is located at the intake valve and will
automatically bleed the sump to zero pressure when the compressor is disengaged. Blow down
time interval takes between 45 and 60 seconds.
CONTROL SYSTEM
The prime component of the compressor control system is the compressor inlet valve. The control
system is designed to match air supply to air demand and to prevent excessive discharge pressure
when compressor is at idle. Control of air delivery is accomplished by the inlet valve regulation
and modulation as directed by the discharge pressure regulator.
NORMALY OPEN REGULATOR SOLENOID
A closed Furnas air pressure switch will energize the normaly open regulator solenoid, thus closing
it. When the normaly open regulator solenoid is closed, air pressure will rise. When it is open air
pressure falls only in the compressor sump.
Note: See page 28 for description of Furnas switch.
NOTE: Most air tools operating pressure range is between 90 and 125 psi. Operating
above the tools recommended pressures will decrease the life of the tool. Higher
operating pressure can also over torque nut and bolts fatiguing the fastener and mating
parts. Strictly adhere to tool operating pressures and torque standards set forth by the
tool manufacturer and the specifications of the equipment that work is being performed
on.
INLET VALVE
The compressor inlet valve is a piston operated disc valve that regulates the inlet opening to control
capacity and serving as a check valve at shutdown.
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