ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0054 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
AIR SYSTEM, HIGH PRESSURE
WARNING
The TWPS must be in Shutdown and the TQG and TWPS main breaker must be off
(Army) or the TWPS disconnected from its power source (Marine Corps) prior to
performing maintenance on the TWPS Air System. Failure to observe this warning
can result in injury to personnel and damage to equipment.
High pressure. The air system contains air pressure up to 1800 psig. The air
system must be bled prior to performing maintenance on components of the air
system. Failure to observe this warning can result in injury to personnel and
damage to equipment.
Replace Pressure-Regulating Valve PRV-901 as follows:
1. Make sure the air system has been bled down. Refer to ENTIRE AIR SYSTEM BLEED DOWN.
2. Remove the Air System Section 1 assembly. Refer to REPLACE and Air System Section 1
Assembly.
3. Disconnect the cross tee pipes from the close nipples at both ends of Pressure Regulating Valve
PRV-901 and remove the valve from the Air System Section 1 assembly (see Figure 17):
PRESSURE REGULATOR VALVE PRV-901
CROSS TEE CONNECTION
CROSS TEE CONNECTION
CLOSE NIPPLES
Figure 17. Pressure Regulator Valve PRV-901.
2. Place the old pressure regulating valve on a clean workbench and perform the following:
a. Remove the two 3/4-in. close nipples from both ends of the pressure-regulating valve.
b. Clean both close nipples and install antiseizing tape on one end of nipples.
c. Thread the taped end of the close nipples into the Pressure-Regulating Valve and
tighten.
d. Install antiseizing tape on the other ends of the close nipples.
NOTE
See Figure 17 for correct positioning of Pressure Regulating Valve PRV-901 and
associated piping.
Care must be taken not over-tighten.
Loosening the
connection once tightened could cause the connection to leak.
0054 00-24
