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
Air System: Instrument/Solenoid Panel Box (see Figure 23)
The Instrument/Solenoid Panel Box houses three flow transmitters, one conductivity transmitter, and the
air manifold assembly. The transmitters are not part of the air system, but perform functions in the MF
and RO system as follows:
MF Feed Flow Transmitter FT-101. Works with Flow Element FE-101 in the MF System to
measure the MF flow (feed flow to the MF assembly when filtering, backwash flow to the MF
assembly during backwash). This flow is displayed at the operator control panel (OCP).
RO Reject Flow Transmitter FT-401. Works with Flow Element FE-401 in the RO System to
measure the reject flow from the RO vessels. Reject flow is displayed at the operator control
panel (OCP).
Conductivity Indicating Transmitter (Analyzer) CIT-501. Uses inputs from Conductivity
Elements CE-501A and CE-501B in the RO System and provides an output to the PLC to
determine total dissolved solids (TDS) in the product water. Product TDS is displayed at the
OCP.
Conductivity Transmitter ON/OFF switch. Used to turn the conductivity transmitter on and off.
Product Flow Transmitter FT-501. Works with Flow Element FE-501 in the RO System to
measure product flow. The flow is displayed at the OCP.
The Air Manifold Assembly is housed behind the transmitters. It is comprised of six solenoid valves that
are activated by the PLC to operate automatic valves in the TWPS. The solenoid valves and the
automatic valves that they control are as follows:
Solenoid Valve XV-904. Controls 100 psig air to MF Main Feed Valve V-111.
Solenoid Valve XV-905. Controls 100 psig air to MF Upper Feed Inlet Valve V-112.
Solenoid Valve VX-906. Controls 100 psig air to MF Lower Feed Inlet Valve V-113.
Solenoid Valve XV-907. Controls 100 psig air to MF Upper Shell Outlet Valve V-401.
Solenoid Valve XV-908. Controls 100 psig air to MF Lower Shell Outlet Valve V-402.
Solenoid Valve XV-909. Controls 100 psig air to MF Upper Filtrate Outlet Valve V-201.
AIR MANIFOLD ASSEMBLY
INSTRUMENT/SOLENOID PANEL BOX
MF FEED FLOW
PRODUCT FLOW
TRANSMITTER
TRANSMITTER
FT-101
FT-501
CONDUCTIVITY
INDICATING
TRANSMITTER
CIT-501
CONDUCTIVITY
TRANSMITTER
ON/OFF SWITCH
RO REJECT FLOW
TRANSMITTER
100 PSIG AIR FROM
FT-401
AIR SYSTEM SECTION 6
Figure 23. Air System: Instrument/Solenoid Panel Box.
0002 00-22
