ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
MAIN PRESSURE CONTROL VALVE HCV-401 CALIBRATION:
Equipment Condition:
TWPS in Standby Shutdown with Drain-Down or Short-Term Shut-Down
Army TWPS: Generator off and TWPS main breaker off
Marine Corps TWPS: TWPS disconnected from power source
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
calibrating Main Pressure Control Valve HCV-401. Failure to observe this warning
can result in injury or death or damage to equipment.
High pressure. The RO Vessels and RO system may be pressurized up to 1200
psig. The TWPS must be drained down to relieve RO system pressure prior to
working on any part of the system. Failure to observe this warning can result in an
explosive release of parts that can cause injury or death to personnel and damage
to equipment.
1. Make sure the TWPS is in Standby Shutdown with Drain-Down. Refer to WP 0017.
NOTE
Calibrating Main Pressure Control Valve HCV-401 consists of tightening the
packing gland to eliminate leaks in the packing gland area of the valve.
2. Calibrate Main Pressure Control Valve HCV-401 as follows:
a. Loosen the locking nut.
b. Tighten the packing gland turn.
c. Retighten the locking nut.
d. If the valve still leaks, repeat the previous three steps.
HCV-401 HANDLE
PACKING GLAND
LOCKING NUT
Figure 16. Main Pressure Control Valve HCV-401 Calibration.
END OF WORK PACKAGE
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