ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0003 00
DESCRIPTION AND THEORY OF OPERATION
THEORY OF OPERATION
Air System Section 3
Air System Section 3 contains the following components (see Figure 19):
Pressure Regulating Valve PRV-902
Pressure Gauge PI-903
Low Pressure Air Vent Valve V-915
Solenoid Valve XV-903
Solenoid Valve XV-901
Pressure Regulating Valve PRV-902 reduces the 100 psig air to 15 psig air that is used for draining the
MF fibers before backwash and for draining the MF assembly shell during drain-down. The reduced
pressure is indicated by Pressure Gauge PI-903. Low Pressure Air Vent Valve V-915 is opened manually
to vent air when it is necessary to adjust pressure PRV-902 to provide a 15 psig reading at PI-903.
Solenoid Valve XV-903 is activated by the PLC to control the flow of 15 psig air to the MF feed inlet for
draining the MF assembly shell during drain-down. Solenoid Valve XV-901 is activated by the PLC to
control the flow of 100 psig air through Air System Section 4 to the MF filtrate outlet to backwash the MF
fibers.
SOLENOID VALVE XV-901
PRESSURE GAUGE PI-903
TO SECTION 4
FROM SECTION 1
TO SECTION 6
PRESSURE REGULATING
VALVE PRV-902
LOW PRESSURE AIR
TO MF FEED INLET
VENT VALVE V-915
SOLENOID VALVE XV-903
TO SECTION 4
Figure 19. Air System Section 3.
0003 00-23
