ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0002 00
DESCRIPTION AND THEORY OF OPERATION
EQUIPMENT DESCRIPTION AND DATA
RO System: RO Vessels to Product Out (see Figure 17)
RO Product Flow Three-Way Valves V-501 through V-510. One three-way valve at the
product water out port of each of the ten RO elements. The valve can be positioned to direct
product water flow from the element to the product manifold, to a sample/drain port that is used
for flow rate and conductivity measurements, or to drain.
Low Range Conductivity Element CE-501A and High Range Conductivity Element CE-
501B. Measure product water conductivity and are connected to Conductivity Indicating
Transmitter (Analyzer) CIT-501.
It is located in the instrument/solenoid panel box shown in Figure 23). Using inputs from CE-
501A and CE-501B, provides an output to the PLC, which displays the measurement on the OCP
as mg/l total dissolve solids (TDS). TDS is an indication of how much salt is in the product water.
A high alarm indicates when the TDS is greater than 1000 mg/L or when the PLC calculates that
the RO membrane salt rejection has become too low.
Product Pressure Gauge PI-501. Indicates the product water discharge pressure.
hoses are blocked in any manner, the relief valve will release pressure from the line when it
exceeds 20 psig to protect the RO vessels and elements.
Product Vacuum Breaker VB-501. Prevents chlorinated water from being siphoned from the
product water distribution system back into the RO vessels when the TWPS is not in operation.
Chlorinated water will damage the RO membranes.
Product Utility Valve V-511 and Hose. Used to deliver product water to the RO feed tank for
certain chemical cleaning procedures. Also a product water source for general use.
in Figure 16. It is located in the instrument/solenoid panel box shown in Figure 23). FE-501 and
FT-501 measure product flow. The flow is displayed at the OCP.
Product Water Check Valve V-512. Prevents chlorinated product water from flowing back into
the RO vessels when the TWPS is not in operation. Chlorinated water will damage the RO
membranes.
Hypochlorite Injection Check Valve V-633. Injection point for a hypochlorite chemical solution
into the product water to prevent microbial growth and contamination.
0002 00-16
