FROM
AIR FILTER
VALVE
IFICE.
n~ll
II
,—!
‘0 -1
SEPARATOR
HOUSING
! k%
HOUSING
INLET VALVE
BLOW DOW
–SOLENOIO
VALVE
VALVE
224ECM797
(Ref. Drawing)
FIGURE 4-5 - INLET VALVE
atmospheric pressure. This valve also functions asa
check valve to prevent back flow of air from the shop
air line when the unit stops, unloads, or is shut down.
The valve incorporates a spring-loaded piston which
maintains approximately 65 psig in the oil reservoir.
When the air pressure on the upstream (reservoir) side
of the valve rises above 65 psig, the spring is overrid-
den and the valve opens to full porting.
The valve does not require maintenance or adjustment,
If the valve fails to function, check the valve stem O-
ring for sealing, valve orifices for restriction, or valve
and valve seat for burrs and dirt.
The valve is adjustable within a small range. It is ad-
justed by a screw on the side of the valve. By turning
the screw, the minimum pressure to open the valve in-
creases.
Conversely, backing it out decreases the
minimum pressure required to open the valve,
inlet Valve (FIGURE 1-4, page 2, and FIGURE 4-5)
- The Inlet valve restricts the inlet to control delivery
and closes to unload the compressor. At shutdown, the
inlet valve closes to prevent the back flow of air.
The inlet valve position is controlled by air pressure in
its piston cylinder, which is controlled by the “Auto
Sentry-ES” through solenoid valves IVC and IVO. As
Pressure to the piston is increased, the valve closes to
restrict air flow and compressor delivery.
Solenoid Valves IVC and IVO - These valves control
position of the inlet valve in response to signals from
the “Auto Sentry -ES.
With both valves de-ener-
gized, the normally open IVC valve allows control pres-
sure to the inlet piston to close the valve. If IVC only
is energized, the inlet valve is held in its current posi-
tion. If both valves are energized, control pressure is
relieved from the inlet piston to allow the valve to open.
To service the valve, unscrew the valve cap from the
Pressure Regulator - The pressure regulator is used
body. The internal parts will come out after the cap has
to supply a constant and low control pressure to pre-
been removed, Repair kits are available from your local
vent damage to the inlet valve from “slamming.” The
authorized Gardner Denver Machinery distributor,
regulator should be set for 25-30 psig.
13-9/10-641 Page 29
To Next Page
Loading...
Need help?
General
