Flow Description; Machine Nomenclature - GE E4H-16K Operation And Maintenance Manual

Operations and Maintenance Manual
E4H Series Water Purification Machine

1.2 Flow Description

The feed water passes through a replaceable 5-micron cartridge filter, which removes bulk
suspended solids. Filtered water then flows to the inlet control valve.
This solenoid-controlled diaphragm valve is wired to the on/off switch and opens when the
machine is turned on, allowing water to flow to the pump inlet. When the machine is turned
off, the valve closes, preventing non-turbulent flow through the membrane elements, which
would lead to shortened membrane life.
The pump feeds water to the membrane housings arranged in parallel and serial
combinations. A throttling valve is included on the pump discharge for manual adjustment
of the pump pressure. The direction of water flow is indicated by an arrow on each housing.
Water is separated by the membrane within the membranes and leaves the housings in two
streams: permeate and concentrate.
Permeate from each membrane housing is collected in a common manifold. The permeate
then flows through a flow meter and to the outlet point of the machine.
The concentrate leaves the last membrane housing and flows to the flow control center
(recycle/concentrate manifold). At this point, the recycle valve channels a predetermined
amount of concentrate into the pump inlet. Recycle increases recovery while maintaining
adequate cross-flow through the membranes. The other two ports of the flow control center
lead to the concentrate valve and final pressure gauge. The concentrate valve has three
functions: It controls the amount of concentrate flowing to the drain; it controls the pressure
within the machine; and it helps control the system recovery. A feed flush solenoid is added
to the flow control center with an additional tee. The concentrate then flows through a flow
meter and to the outlet point of the machine.

1.3 Machine Nomenclature

E-Series water purification machines are numbered in such a way as to indicate the
permeate flow you can expect from the machine and other specifications.
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