ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
REPAIR
Waste Out Rupture Disk RD-401 Repair:
Parts:
Rupture disk (BII and TM 10-4610-309-24P)
Equipment Condition:
TWPS in Standby Shutdown Without Draining Down
Army TWPS: Generator off and TWPS main breaker off
Marine Corps TWPS: TWPS disconnected from power source
Replace the rupture disk in Waste Out Rupture Disk RD-401 assembly as follows (see Figure 18):
WARNING
High velocity discharge hazard. The blow back step of the automatic MF backwash
operation results in a sudden and very high velocity surge in the waste outlet
hoses. 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 waste out rupture disk RD-401. Failure to
observe this warning can result in injury.
1. Remove the rupture disk from rupture disk assembly RD-401 as follows:
a. Note the position of the vent pipe for the position it needs to be in when reinstalled.
b. While holding the vent pipe, unthread the nut from the inlet connection.
c. Carefully lift the vent pipe and nut off of the inlet connection. The outlet connection will
come out with the vent pipe and nut.
d. Lift the rupture disk off of the inlet connection.
VENT PIPE
NUT
RUPTURE DISK
OUTLET CONNECTION
INLET CONNECTION
Figure 18. RD-401 Rupture Disk Replacement.
2. Install the new rupture disk as follows:
a. Insert a new rupture disk in the inlet connection with the dome side of the disk facing up.
b. Position the outlet connection, nut and vent pipe onto the rupture disk.
c. Thread the nut onto the inlet connection, position the vent pipe as it was before it was
removed, and tighten the nut.
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