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HPB
TM
Series
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13
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Installation Procedures Continued
Installation Configurations Continued
Positive Displacement (PD) High Pressure Feed Pumps
With a positive displacement (PD) feed pump configuration,
•
DO NOT use a throttle valve.
•
A pulsation dampener is required and should be installed between the outlet of the feed pump
and the HPB feed pump inlet. The pulsation dampener should be adjusted according to the
feed pump discharge pressure with the HPB in operation.
•
A pressure relief valve is also necessary and should be installed between the HPB feed outlet
and the system membrane inlet.
CAUTION
If the feed pump and motor are not rated for operation at full membrane pressure, a second pres
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sure relief valve must be installed to prevent motor and feed pump overload if the HPB becomes
Inoperative.
Motor
Brine
Permeate
Product
High Pressure
Pulsation
Brine Outlet
Feed
Dampener
Brine Stream
High Pressure
High Pressure
Positive
Displacement
Feed Pump
HPB™
Relief Valve
Second Relief Valve
(If Motor and Pump
Are Not Rated For
Full Membrane
Pressure Operation)
Figure 11 -
Positive Displacement Feed Pump Configuration