HPB
TM
Series
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Theory and Operation
HPB External Components
The Hydraulic Pressure Booster™ or HPB™ is designed to provide brine energy recovery in
reverse osmosis (RO) systems. The HPB™ is energized by the high-pressure brine stream which
causes the HPB™ to generate a large pressure boost in the feed stream independent of the high
pressure feed pump.
The HPB™ is typically installed between the
high pressure feed pump and the membrane.
The feed passes through the pretreatment
system and then passes through the feed
pump which raises the feed pressure. The
pressurized feed passes through the HPB™,
which provides an additional pressure increase
before passing to the membrane. The high
pressure brine steam from the membrane is
directed back to the HPB™.
The HPB™ recovers the pressure energy and
discharges the brine at low pressure for dis
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posal. The HPB™ does not require a brine
disposal pump or gravity flow piping as the
brine can be discharged against a back pres
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sure. The HPB™ reduces feed pump energy
consumption and allows use of a smaller feed
pump, smaller motor, smaller motor starter,
electrical wiring, etc.
Motor
Brine
High Pressure
Brine Outlet
HPB™
Feed
High Pressure
Location
Throttle Valve
Brine Stream
Pump
High Pressure
Permeate
Product
Motor
Permeate
Brine
Brine
Product
Permeate
Product
Throttle Valve
HPB™
High Pressure
Location
Pump
Brine Stream
High Pressure
Feed
High Pressure
Brine Outlet
First Stage
Brine
Figure 3 - Hydraulic Pressure Booster Flow
Figure 4 -
Interstage Boosting Pump Configuration
