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
WARNING
Potential catastrophic failure point. The retaining ring must be correctly installed.
Failure to observe this warning can result in explosive end cap failure when the
vessel is pressurized which, in turn, can cause death, serious injury, and/or severe
equipment damage.
f.
Place the tip of the retaining ring into the groove, then slide your fingers around the ring
pushing it into the groove as you go until the entire ring is in the groove (see Figure 8).
g. Verify that the retaining ring is fully seated in the groove before proceeding.
8. Reinstall the following piping:
a. Reinstall the feed/reject piping to the vessel feed/reject ports.
b. Reinstall the black product water hoses and the clear sample/drain hoses to the vessel 3-
way valves.
c. Reinstall any TWPS piping that was removed in order to remove the RO elements.
WARNING
Potential for catastrophic failure. Improper assembly or corrosion damage can
result in mechanical failure, property damage and serious injury or death. Perform
the recommended pre-pressurization checks before pressurizing the RO vessels.
Failure to observe this warning can result in severe equipment damage and
serious injury or death.
9. Perform the following pre-pressurization checks:
a. Make sure that all the elements were installed in each vessel.
b. Make sure that the element inter-connector was installed in each vessel.
c. Make sure that the thrust ring was installed in the downstream end of the vessels.
d. Make sure that the element adapters were installed at each end of the vessels.
e. Make sure that the port nut at each end of the vessels is snug.
f. Make sure that the port retainers were correctly installed.
g. Make sure that the retaining ring is properly seated in the groove at each end of the
vessels.
h. Make sure that all end cap assemblies are in good condition, with no evidence of damage
or corrosion.
i. Make sure that all piping connections will provide a leak-free seal.
j. If you are unable to ensure all of the above checks, or if you do not understand what is
required by any of the checks, do not pressurize the vessels until proper assembly can
be assured. If this means disassembling and reassembling any or all of the vessels to
ensure that maintenance and proper assembly is performed, then disassemble and
reassemble as necessary.
10. Flush the new RO elements at initial use as follows:
a. Slowly fill the vessels with feed water to allow trapped air to escape.
b. Slowly pressurize the vessels to avoid damage to the elements and vessel components.
c. Discharge the product water to the ground for 2 hours to flush the new elements before
connecting to the distribution system.
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