13-18-603 Page 102
SECTION 9
MINIMUM PRESSURE/CHECK VALVE
MINIMUM PRESSURE/CHECK VALVE
- This device maintains minimum pressure within the air/oil
reservoir, thus insuring (cooling/lubricating) oil injection flow into the compressors. It also serves as a
check valve to prevent back flow of compressed air flow from the customer
’s piping or pipe network back
into the compressor package when the compressor is not active. 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. Repair kits are available from your local
authorized Gardner Denver distributor.
Before servicing the minimum pressure valve, always stop the unit, release air
pressure, lockout and tagout the power supply to the compressor package.
Failure to release pressure or properly disconnect the power may result in
personal injury or death.
NOTICE
Working spring within valve body is under tension. Failure to relieve spring
tension gradually may cause serious injury upon cap removal.
Minimum Pressure/Check Valve (MPV) Inspection:
(See Figure 9-1)
1. Be sure the unit is completely off and that the oil sump is depressurized
– including pipe works
between MVP and (external) isolation valve.
2. Disconnect, lockout and tagout power supply to the compressor package.
3. Tighten nut (13) on the MPV cover (16).
4. Unscrew bolts fastening MPV housing (1) to the sump housing and remove MPV.
5. Remove snap ring (9).
6. Remove internal assembly (2-20) away from MPV housing (1) and inspect or replace components.
7. Re-assemble internal assembly (2-20) into MPV housing (1) in reverse order.
8. Clean o-ring sealing surfaces between sump and bottom of MPV housing (1). Inspect, clean and or
replace o-ring prior to re-installation.
9. Re-install MPV unto sump with provided bolts.
10. Adjust nut (13) so that there is a small (.08
”) between itself and the cover (16).
11. Check for leaks after unit is back in operation.
Summary of Contents for AirSmart VS25A
Page 35: ...13 18 603 Page 34 Figure 4 1 ELECTRICAL ENCLOSURE HARDWARE 310CGC810 D Ref Drawing...
Page 39: ...13 18 603 Page 38 Figure 4 2 PIPING AND INSTRUMENTATION ILLUSTRATION 300CGC797 A Ref Drawing...
Page 41: ...13 18 603 Page 40 300CGC546 E Ref Drawing Page 2 of 4...
Page 42: ...13 18 603 Page 41 300CGC546 E Ref Drawing Page 3 of 4...
Page 43: ...13 18 603 Page 42 300CGC546 E Ref Drawing Page 4 of 4...
Page 45: ...13 18 603 Page 44 301CGC546 E Ref Drawing Page 2 of 4...
Page 46: ...13 18 603 Page 45 301CGC546 E Ref Drawing Page 3 of 4...
Page 47: ...13 18 603 Page 46 301CGC546 E Ref Drawing Page 4 of 4...
Page 49: ...13 18 603 Page 48 302CGC546 C Ref Drawing Page 2 of 4...
Page 50: ...13 18 603 Page 49 302CGC546 C Ref Drawing Page 3 of 4...
Page 51: ...13 18 603 Page 50 302CGC546 C Ref Drawing Page 4 of 4...
Page 53: ...13 18 603 Page 52 303CGC546 C Ref Drawing Page 2 of 4...
Page 54: ...13 18 603 Page 53 303CGC546 C Ref Drawing Page 3 of 4...
Page 55: ...13 18 603 Page 54 303CGC546 C Ref Drawing Page 4 of 4...
Page 57: ...13 18 603 Page 56 304CGC546 C Ref Drawing Page 2 of 4...
Page 58: ...13 18 603 Page 57 304CGC546 C Ref Drawing Page 3 of 4...
Page 59: ...13 18 603 Page 58 304CGC546 C Ref Drawing Page 4 of 4...
Page 61: ...13 18 603 Page 60 305CGC546 C Ref Drawing Page 2 of 4...
Page 62: ...13 18 603 Page 61 305CGC546 C Ref Drawing Page 3 of 4...
Page 63: ...13 18 603 Page 62 305CGC546 C Ref Drawing Page 4 of 4...
Page 65: ...13 18 603 Page 64 306CGC546 C Ref Drawing Page 2 of 4...
Page 66: ...13 18 603 Page 65 306CGC546 C Ref Drawing Page 3 of 4...
Page 67: ...13 18 603 Page 66 306CGC546 C Ref Drawing Page 4 of 4...
Page 69: ...13 18 603 Page 68 307CGC546 C Ref Drawing Page 2 of 4...
Page 70: ...13 18 603 Page 69 307CGC546 C Ref Drawing Page 3 of 4...
Page 71: ...13 18 603 Page 70 307CGC546 C Ref Drawing Page 4 of 4...
Page 73: ...13 18 603 Page 72 308CGC546 C Ref Drawing Page 2 of 4...
Page 74: ...13 18 603 Page 73 308CGC546 C Ref Drawing Page 3 of 4...
Page 75: ...13 18 603 Page 74 308CGC546 C Ref Drawing Page 4 of 4...
Page 77: ...13 18 603 Page 76 309CGC546 C Ref Drawing Page 2 of 4...
Page 78: ...13 18 603 Page 77 309CGC546 C Ref Drawing Page 3 of 4...
Page 79: ...13 18 603 Page 78 309CGC546 C Ref Drawing Page 4 of 4...
Page 104: ...13 18 603 Page 103 Figure 9 1 MINIMUM DISCHARGE PRESSURE CHECK VALVE...
Page 117: ......