Hale MBP Booster - Manual (Page 22)

21 Silencer Series Booster Pump, p/n: 029-0020-83-0
Introduction
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Priming Systems
Priming pumps are used to evacuate air in the suction hose and pump.
`The vacuum created allows atmospheric pressure to push water from the
static source through the suction hose and into the pump.
Hale booster pumps use Rotary Vane Positive Displacement type pumps for
priming. (See Figure 2-7: “Rotary Vane and ESP Priming Pumps.”)
Figure 2-7: Rotary Vane and ESP Priming Pumps
The priming pump has a rotor mounted off-center (eccentric) to the pump
body housing. The rotor vanes slide in grooves and are held against the
body housing by centrifugal force. As a vane turns toward the discharge, it
recedes into the rotor compressing the air.
As the rotor continues past the discharge, the vane advances outward from
the groove and against the body housing. During this cycle, the space
between the rotor and housing case fills with air. The vanes, acting as wip-
ers, force air out of the discharge, creating a vacuum in the main pump
allowing atmospheric pressure to push water into the hose and suction side
of the pump.
The Hale ESP series priming pump is an environmentally friendly primer
that does not require a separate lubricant reservoir. The vanes and pump
body are self-lubricating for maintenance free operation.