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
Replace an RO Element as follows:
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 an RO element. Failure to observe this warning can result in
injury or death from electrocution 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.
2. Remove the following piping (see Figure 4):
a. For RO element 10:
1) Remove the grooved coupling at the RO reject port.
2) Remove the grooved coupling in the U-shaped RO reject pipe run.
3) Disconnect the hose from Main Pressure Control Valve HCV-401.
4) Disconnect the hose from Auxiliary Pressure Control Valve HCV-401A.
5) Remove the flex strut pipe support that secures the RO reject pipe to the floor.
6) Remove the RO reject pipe run that includes Main Pressure Control Valve
HCV-401, Auxiliary Pressure Control Valve HCV-401A, Pressure Indicator PI-
401, and RO Vessel Drain Valve V-408.
b. For RO Element 5:
1) Disconnect the sample/drain hose from MF Filtrate Sample Valve V-204.
2) Remove MF Filtrate Sample Valve V-204 to provide room to install the RO
elements after the RO simulator has been removed.
c. For RO Element 8:
1) Remove the two sanitary clamps from the MF lower shell backwash pipe run.
2) Remove the pipe section that was secured by the two sanitary clamps and
remove the two sanitary clamp gaskets.
d. For all RO Elements:
1) Tag and remove the black product water hoses from the 3-way valves.
2) Tag and remove the clear sample/drain hoses from the 3-way valves.
3) Tag and remove the grooved couplings and feed/reject pipes from the RO
vessel feed/reject ports.
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