TM 55-1930-209-14&P-4
Table 3-2. System Valves
Figures
1-2 & 1-3
Label Identification
Type
Callout
Location
and Valve Function
2-way
CU1*
In chlorination unit manifold drain
CHLORINATION PRESSURE RELIEF
line
(PRESET): Allows relief drainage from
manifold to sump in case of pressure
build-up in chlorination unit cells
2-way
CU2*
In recirculating (circulating) pump
CHLORINATION SYSTEM HOLDING TANK
suction line from holding tank
OUTPUT TO RECIRCULATING PUMP:
(recycle tank)
Allows flow from holding tank to
recirculating pump during normal operation
3-way
CU3*
In acid tank outlet line
CHLORINATION DESCALING OPERATION
FLOW CONTROL: In WATER position,
allows flush water to flow to recirculating
pump to flush out both residual hypochlorite
(before flushing with acid), and acid (during
scale flushing operation). In ACID position,
allows acid to flow from acid tank to
recirculating pump during scale flushing
operation. Closed (OFF) during normal
operation
3-way
CU4*
In recirculating pump discharge
CHLORINATION RECIRCULATING PUMP
line
OUTPUT CONTROL: Allows recirculating
pump discharge to flow to heat exchangers
and cells during normal operation and, when
50% open, during scale flushing operation
3-way
CU5*
In acid tank inlet line
CHLORINATION DESCALING OPERATION
FLOW CONTROL: In ACID position, allows
acid to flow back to acid tank during scale
removal operation. In DRAIN position,
allows flush water to drain overboard during
scale flushing operation. Closed (OFF)
during normal operation
2-way
CU6*
In holding tank cell input line
CHLORINATION SYSTEM HOLDING TANK
CELL OUTPUT: Allows cell output to flow to
holding tank during normal operation
2-way
CU6A
In holding tank cell output line
CHLORINATION HOLDING TANK INPUT:
Allows cell output to flow from valve CU6 to
holding tank
3-way
CU*
In brine tank outlet line
CHLORINATION BRINE FLOW CONTROL:
Allows brine to flow from brine tank to brine
pump and allows draining in brine tank
3-3
