TM 55-1930-209-14&P-1
Table 9-3. Chlorination System Valves
Figures 9-1
& 9-2
Label Identification
Type
Callout
Location
and Valve Function
2-way
CU1*
In chlorination unit
CHLORINATION PRESSURE RE LIEF
manifold drain 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)
CHLORINATION SYSTEM HOLDING
pump suction line from
TANK OUTPUT TO RECIRCULATING
holding tank (recycle tank)
PUMP: Allows flow from holding tank to
recirculating pump during normal operation
2-way
CU2A*
In circulating (recirculating)
CHLORINATION CELL INPUT: Allows
(Barges 2
pump suction line near valve
flow from valve CU2 to recirculating
and 3 only)
CU2
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
CHLORINATION RECIRCULATING
discharge line
PUMP 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
CHLORINATION SYSTEM HOLDING
input line
TANK CELL OUTPUT: Allows cell output to
flow to holding tank during normal operation
2-way
CU6A*
In holding tank cell
CHLORINATION HOLDING TANK
(Barges 2
output line
INPUT: Allows cell output to flow from
and 3 only)
valve CU6 to holding tank
3-way
CU7*
In brine tank outlet line
CHLORINATION BRINE FLOW
CONTROL: Allows brine to flow from
brine tank to brine pump and allows
draining of brine tank
9-18
