Hale 2CBP - Manual (Page 10)

Sec I- 6 Introduction
Booster Pumps
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.
A Hale priming pump has a single control to
open the priming valve between the booster
pump and the priming pump, and start the
priming motor.
Priming Valves
Hale priming valves open when the priming
pump is operated to allow the air to escape from
the pump. There are two priming valves
available:
1. Hale Semi-Automatic Priming Valve for
Remote Mounting (SPVR) A hose is
connected from the SPVR to the priming tap
on the booster pump body. When the SPVR
is installed, a single push-button on the
operator’s panel starts the priming pump
motor. When a vacuum is created, the
SPVR opens. Releasing the push-button
stops the priming pump and the SPVR
closes. Figure 1-9
2. The Hale PVG Priming Valve (Figure 1 -
10) is mounted on the pump operator’s
panel. The PVG is a combination valve and
switch. When the handle on the PVG is
pulled out, the valve opens and the switch
energizes the primer motor. Pushing the
handle de-energizes the motor and closes
the valve.
Pressure Control
The P Series relief valve system is a bronze,
variable-pressure setting relief valve that
prevents undue pressure per the requirements
of NFPA Standard 1901. An indicator light on
the operator control panel signals when the
valve is open.
The P Relief Valve System
The P relief valve system consists of a panel
mounted control valve (PM) and, depending on
the pressure rating of the pump, a P30, or P35
relief valve mounted in the discharge piping and
plumbed back to the pump suction. Valve
connections are either flanged or Victaulic
tm .
Both are shown in figure 1-12.
How the Relief System Works:
A bleeder line mounted in the pump discharge
pressure tap provides pressure to the
diaphragm in the PM control valve. The
handwheel on the PM control either increases
or decreases the spring tension on the
diaphragm. The seat of the P-series relief valve
is kept closed by pump discharge pressure.
As pump pressure increases, more pressure is
Figure 1 -10: PVG Priming Valve
Figure 1 -9 : SPVR Priming Valve