TM 5-4310-393-144-18. PRESSURE MAINTAINING VALVE.This task covers. A Adjust B. ReplaceTools:Materials/Parts:Tool Kit, General Mechanic's SetNon-ionic Detergent, NSN 7930-00-282-9699Distilled Water, NSN 6810-00-297-9540Equipment Conditions:Compressor OperationalPressure Purged From SystemNOTEThe setting of the PMV at the factoryis 2000 psi (138 bar)..A Adjust1.To determine if the Pressure MaintainingValve PMV is properly adjusted:a. Depressurize the final separator andpurification chamber by slowly opening the manualpurge valve.b.Close the purge valve and then startthe compressor with the delivery valve open.Figure 4-13. PMVc.Observe the final pressure and note the pressure at which the PMV opens (air is delivered) If thepressure is not within 2000 ± 200 psi (138 + 14 bar), readjust the PMV.d.To readjust the pressure setting loosen the locking ring (Figure 4-13, Item 2), and using a hex key,turn adjusting screw (1) clockwise to increase pressure, counter-clockwise to reduce pressureB.Replace.1.Replacing the PMV.a.Open the purge valve and release all air pressure from the system (paragraph 23)b. Disconnect the air lines from the PMV and install a new unit in its place. Soap test all fittings for leaksc. Adjust new valve as in steps 1, a through c.4-19.INTERSTAGE PRESSURES.This task covers, A Check B Install C. TestTools:Materials/Parts:Tool Kit, General Mechanic's SetCloth, Lint-free NSN 7920-00-044-9281Pressure Gauge, Test (P/N 057491Detergent, Non-ionic NSN 7930- 00-282-9699Pressure Gauge, Test (P/N 057492)Water, Distilled NSN 6810-00-297-9540Equipment Conditions:Unit Shut Down4-31
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
