C-2
Figure 52. Rotor And Vanes
During each cycle, the space between the rotor and the housing fills with air. The vanes, acting
as wipers, forces the air out the discharge, creating a vacuum in the booster pump allowing at-
mospheric pressure to push water into the suction hose and fill the suction side of the booster
pump.
The Hale ESP-series priming pump is an environmentally friendly primer that does not require a
separate lubricant reservoir. The vanes and volute are self-lubricating for maintenance free op-
eration. Figure 52 shows an ESP priming pump.
Figure 53. ESP Priming Pump
A Hale ESP priming pump utilizes a single control, the PVG (opens the priming valve and turns on
the ESP), which is located between the booster pump and the priming pump.
C.1.2 Priming Valves
Hale priming valves open when the priming pump is operated to control priming of the booster
pump. There are two types of priming valves available:
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