ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0052 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
2. Install the new product check valve as follows:
a. Position the new product check valve in-line with the disk pointing upstream toward
Product Vacuum Breaker VB-501 and with the check valve spring pointing downstream
toward the chemical injection point and discharge end of the product line.
b. Be sure the gasket is in place between the valve and the upstream pipe flange. Install
the sanitary clamp and tighten.
c. Be sure the gasket is in place between the valve and the downstream pipe section. Push
the pipe section up to the check valve. Install the sanitary clamp and tighten.
d. Re-tighten the pipe clamp.
Main and Auxiliary Pressure Control Valves HCV-401 and HCV-401A Replacement:
Parts (TM 10-4610-309-24P):
Main Pressure Control Valve HCV-401
Auxiliary Pressure Control Valve HCV-401A
Material:
Tape, antiseizing (WP 0079, Table 1, item 43)
Equipment Condition:
TWPS in Standby Shutdown With Drain-Down
Army: TWPS main breaker off
Marine Corps: TWPS disconnected from power source
Replace Main Pressure Control Valve HCV-401 or Auxiliary Pressure Control Valve HCV-401A as follows
(see Figure 12):
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
removing or installing Main Pressure Control Valve HCV-401 or Auxiliary Pressure
Control Valve HCV-401A. Failure to observe this warning can result in injury or
damage to equipment.
1. Remove Main Pressure Control Valve HCV-401 or Auxiliary Pressure Control Valve HCV-401A
as follows:
a. Make sure the TWPS is in Standby Shutdown With Drain-Down.
b. Loosen and remove the hose clamp and hose from the outlet side of the pressure control
valve.
c. Unscrew the valve from the threaded inlet pipe at the inlet side of the valve.
d. Unscrew the threaded outlet pipe from the outlet side of the valve.
e. Discard the valve.
2. Install the new valve as follows:
a. Clean off any tape residue remaining on the threaded end of both the valve inlet and
outlet pipes.
0052 00-16
