TM 10-4610-239-24
TM 08580B-24/3
26.
R.O. PRESSURE PSI GAGE. Indicates output pressure of R.O. pump.
27.
R.O. ELEMENTS. Perform final filtration. Water from pulse dampener flows into outer shell of one pressure
vessel. Inside the pressure vessel, pure water is forced into the two filter elements through their permeable
membrane surfaces. Water still containing foreign matter flows through the other three pressure vessels in
series. In each pressure vessel, pure water is forced into the filter elements. The remaining unfiltered water
(brine) flows out of the RO'WPU for storage in the backwash water tank. Pure water flows out of the center of
each pair of filter elements into a common pipe that carries the water out of the ROWPU for storage in the
product water tanks. Connections between pressure vessels are different in the two models, but operation is
identical.
28.
R.O. VESSELS GAGE. Indicates differential pressure across the R.O. elements.
29.
BRINE FLOW METER. Indicates rate of brine flow out to backwash water tank.
30.
BACKWASH WATER TANK. Collects water rejected by R.O. elements (brine) for use in backwashing
multimedia filter and in cleaning the R.O. elements.
31.
BACKWASH TANK VALVE. Controls flow of brine from backwash water tank.
32.
BACKWASH PUMP. Forces bring backward through multimedia filter during backwash. Output of multimedia
filter is dumped out of ROWPU through WASTE hose. When backwash cycle is complete, output of backwash
pump is connected to VENT VESSELS line. Brine mixed with citric acid is then forced through R.O. elements to
clean them. The solution is returned to backwash water tank and recirculate by backwash pump. Product water is
sent to backwash water tank during this procedure to keep the citric acid solution from becoming concentrated.
33.
BACKWASH PUMP STRAINER. Filters brine before it enters multimedia filter or R.O. elements.
34.
BACKWASH WATER FLOW GAGE. Indicates rate of brine flow into multimedia filter during backwash.
35.
CHECK VALVE. Prevents raw water from entering backwash water line.
36.
VENT VESSELS VALVE. During ROWPU startup, bypasses R.O. pump output around R.O. elements until
multimedia filter stabilizes. During element cleaning, passes brine/citric acid solution from backwash pump to
R.O. elements.
37.
PRODUCT WATER SAMPLE BALL VALVES. Provide samples of filtered water at input ends of pressure
vessels.
38.
PRODUCT WATER SAMPLE ELLIPTIC VALVES. In normal position, pass product water out of R.O. elements to
product water tanks. In sample position, direct product water out of each R.O. vessel as a sample. Design
prevents shutdown of water flow while switching between normal and sample positions.
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