ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
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OPERATOR INSTRUCTIONS
MAINTAINING NORMAL OPERATION UNDER USUAL CONDITIONS
Table 1. Schedule of Routine Crew Operational Services Continued.
Operational Service
Reference
Frequency or Alert
Determine and record RO % Clean
Daily
Clean RO
When indicated by performance.
Remove and clean MF Feed Tank Bag Strainer S-1
Check daily. Each 100 hours of operation at a minimum
during normal PMCS shutdown
Distribute Product water
As needed.
Check MF Integrity (MF Integrity Test)
At the first PMCS shutdown for the TQG.
After every 300 hours of operation.
MAINTAINING PRODUCT FLOW
NOTE
To assure the mission water production requirements are met, the flow should be adjusted
0.5 to 1 gpm higher than the normal flow rate. Do not set the water flow more than 1 gpm
higher than the normal flow listed. The high TDS concentration in the reject may result in
scaling of the RO elements, which will require acid cleaning to remove.
1. If the product flow rate is less than that shown in Table 2, increase the RO Feed pressure by
slowly closing Main Pressure Control Valve HCV-401 until the flow is obtained, the RO Feed
Pressure reaches 1200 psig, or the valve is closed.
2. Adjustments will not be frequent but will be needed if the water temperature changes or wind and
tide change the TDS of the raw water source.
NOTE
Below 500F, the full 1200 gph water production on a seawater source may not be reached
at 1200 psig, especially with older RO elements.
Do not exceed 15 gpm when operating on seawater over 50,000 mg/l, even if a higher flow
can be obtained.
Table 2. Normal Product Flow Rates.
WATER SOURCE
NORMAL PRODUCT FLOW
TEMPERATURE RANGE
0
Surface water to 20,000 mg/l
25 gpm, 1500 gph
32 to 95 F
0
Ground (well) water to 2500 mg/l
25 gpm, 1500 gph
32 to 95 F
0
Surface water over 20,000 mg/l
20 gpm, 1200 gph
32 to 95 F
Ground water over 2500 mg/l
0
Normal seawater at 35,000 mg/l
20 gpm, 1200 gph
32 to 95 F
0
Seawater at 45,000 mg/l
(See note 1 above)
20 gpm, 1200 gph
50 to 95 F
0
17 gpm, 1020 gph
32 to 50 F
0
Seawater at 60,000 mg/l
(See note 2 above)
15 gpm, 960 gph
77 to 95 F
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