Gardner Denver INTEGRA EFA99F, Руководство по эксплуатации и обслуживанию

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13-8-639 Page 35
WARNING
Operation of unit with improper relief valve setting can result in severe personal
injury or machine damage.
Insure properly set valves are installed and maintained.
Blowdown Valve (Figure 4-4, page 37) - This valve is normally used for control functions, but also serves
to relieve air/oil reservoir pressure following a shutdown. The blowdown valve is a pneumatic operated
valve which is piped into the air/oil reservoir, ahead of the minimum pressure check valve. When the
valve is open, the system blows down. When the valve closes, the system pressurizes.
Oil Level Gauge - This gauge is located on the oil reservoir and indicates the oil level. See Section 5,
page 45, for information on how to correctly read the gauge.
Minimum Discharge Pressure/Check Valve (Figure 5-1, page 45) - An internal spring-loaded minimum
pressure/check valve is used in the final discharge line to provide a positive pressure on the coolant
system of the compressor even if the air service valve is fully open to atmospheric pressure. This valve
also functions as a check valve to prevent backflow of air from the shop air line when the unit stops,
unloads or is shutdown.
The valve incorporates a spring-loaded piston which maintains approximately 65 psig in the air/oil
reservoir. When the air pressure on the upstream (air/oil reservoir) side of the valve rises above 45 psig,
the spring is overridden and the valve opens to full porting.
The valve does not require adjustment. If the valve fails to function, check the valve for dirt or burrs, and
if the o-rings or seals are worn. See the Parts List for a listing of the kits available for rebuilding or
replacing the valve. Repair kits are available from your local authorized Gardner Denver distributor.
Changing Minimum Pressure/Check Valve Seals
1. Be sure the unit is completely off and that no air pressure is in the oil reservoir. Close the service
valve.
2. Disconnect, lockout and tagout the power supply to the starter.
3. Tighten the nut down on the minimum pressure/check valve cover.
4. Remove the six (6) bolts holding the cover onto the separator housing.
5. Remove the snap ring in the cover.
6. Remove the internals and replace the seals in the minimum pressure/check valve.
7. Re-assemble valve, including the snap ring.
8. Tighten the cover down to the separator housing.
9. Loosen the nut on top of the minimum pressure/check valve .05 to .08 inches, with no pressure in
the system.
10. Run the unit and check for leaks.