ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
GENERAL MAINTENANCE
Welded Ball Valve Replacement:
Parts (TM 10-4610-309-24P):
MF clean feed valve V-704
RO feed tank drain to waste valve V-412
RO clean mixing valve V-703
Materials:
Clean, dry, lint-free rags (WP 0079, Table 1, item 33)
Valve Seal Lubricant (WP 0079, Table 1, item 26)
Equipment Condition:
TWPS in Standby Shutdown with Drain-Down
Replace the any of the welded ball valves listed below as follows:
- MF System: V-704
- RO System: V-412, V-703
NOTE
1-1/4 in. and larger ball valves have piping welded to the valve.
1. Make sure the TWPS is in Standby Shutdown with Drain-Down. Refer to WP 0017.
2. Remove the welded ball valve from the pipe line as follows (see Figure 5):
a. Make sure that the valve is in the open position with the valve handle in-line with the
pipeline. This prevents the ball from protruding out of the body and scoring the body
connectors when the body is removed.
b. Remove the four nuts and bolts that hold the valve to the body connectors.
c. Slightly pull the body connectors apart to prevent scoring of the machined faces.
d. Slide the valve body completely away from the body connectors. Care must be taken not
to damage the connector sealing faces.
VALVE HANDLE
VALVE BODY
SEAL
NUTS
BALL SEAT
BOLTS
PIPE
BODY CONNECTORS
Figure 5. Welded Ball Valve Body Replacement.
3. Clean and inspect the body connector faces.
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