TM 10-4610-232-12
Table 2-5. Manual Water Valves
(Item numbers are keyed to Figure 2-6)
Item
Control/Indicator
Function
1
FEED WATER BOOSTER
This valve is opened to drain the pump when securing the
PUMP DRAIN VALVE - V9
ROWPU and is also used to drain the in-line strainer.
2
RAW WATER SAMPLE/VENT
This valve is used to take samples of raw water and to vent
VALVE - V11
water before opening the strainer.
3
FEED VALVE - V14
This valve is used to control the flow of water during media
filter backwash. Also closed before changing the strainer
basket.
4
MEDIA FILTER OUTLET
This valve is used to take water samples after the media
SAMPLE VALVE - V33
filter.
5
MEDIA FILTER VENT
This manual valve is opened when the system is first
VALVE - V19
started. It allows air to be released from the media filter.
6
MEDIA FILTER UPPER DRAIN
This valve is used to help drain the filter for secured
VALVE - V25
shutdowns. May also be used to establish proper water
level for first backwash step.
7
(DELETED)
8
MEDIA FILTER LOWER DRAIN
This manual valve is used to drain the media filer for
VALVE - V24
secured shutdowns.
9
CARTRIDGE FILTER BLOCK
This manual valve is closed before opening the cartridge
VALVE - V37
filter to remove and replace the filter cartridges.
10
CARTRIDGE FILTER DRAIN
This manual valve is used to drain cartridge filter for
VALVE - V39
secured shutdowns and whenever the cartridge filters are
being replaced.
11
CARTRIDGE FILTER VENT
This manual valve is opened when the system is first
VALVE - V38
started. It allows air to be released from the cartridge filter.
This valve must always be opened to relieve any pressure
before removing filter top for maintenance.
12
PIPING DRAIN VALVE - V40
This valve is opened when securing the ROWPU.
13
CARTRIDGE FILTER OUTLET
This valve is used to take water samples after water
SAMPLE VALVE - V41
passes through the cartridge filter. Monitoring of samples
from this point is routine.
14
CLEANING BYPASS
This manual valve is opened to bypass the media filter
VALVE - V13
when cleaning the RO elements.
15
SYSTEM PRESSURE CONTROL
This manual valve controls the feedwater pressure to
VALVE - V51
the RO elements. It should be fully closed during start-up.
16
PRODUCT (WATER SAMPLE)
Items 16 thru 19 allow the product water from each of the
TOP WALL VESSEL - V54
four RO vessels to be sampled for water quality (TDS).
17
PRODUCT (WATER SAMPLE)
TOP AISLE VESSEL - V55
18
PRODUCT (WATER SAMPLE)
BOTTOM WALL VESSEL - V56
19
PRODUCT (WATER SAMPLE)
BOTTOM AISLE VESSEL - V57
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