Hale 2CBP - Manual (Page 9)

Introduction Sec I-5
Booster Pumps
NOTE: Please refer to Hale Bulletin #886 for
further assistance in selecting the correct
booster pump PTO.
ACCESSORIES
In addition to the basic parts of Hale booster
pumps described above, the following items are
available to enhance operation:
o
Cooling Systems
o
Priming Systems
o
Pressure Control Devices
o
Anodes
Auxiliary Cooling (Overheat Protection)
A cooler is available to protect the gearbox, the
apparatus engine, and the pump.
The gearbox cooler (see Figure 1-7), circulates
pump water to transfer heat from the gearbox oil
to the pump discharge. It is standard equipment
on pumps with a capacity of 750 GPM or greater
and optional equipment on all other pumps.
Priming Systems
Priming the Pump
Priming pumps are used to evacuate air in the
suction hose and the 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.
A priming pump draws air out of the pump body
and discharge piping allowing water to enter.
Shown in figure 1-8, the priming pump has a
rotor mounted off-center (eccentric) to the
pump body housing. The vanes in the rotor
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 wipers, 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.
ESP Priming
Pump
Figure 1-8: Rotary Vane Priming Pump
Figue 1-7. This AP pump shows
the optional gearbox cooler (This
option available on CBP, and
2CBP too.)