S
emi-Automatic
P
riming
V
alve
2
Figure 1. Hale SPV Valve and Push-Button Switch Assembly
DESCRIPTION
(19 mm) ID vacuum hose connects the Hale
SPV to the priming pump, eliminating potential
leak points in the priming hose. The short
length of hose also reduces the volume that the
priming pump must evacuate allowing faster
priming time and longer primer life. The priming
pump motor operates by a sealed momentary
contact push-button located on the pump
operator panel of the apparatus. There are NO
hose connections at the pump operator panel
thus saving valuable space.
Depressing and holding the PRIME push-button
will energize the priming pump motor creating a
vacuum in the
3
/
4
inch (19 mm) ID hose. As
sufficient vacuum is created the diaphragm will
depress the spring allowing the priming valve to
open. Once the Hale SPV opens, the priming
pump creates a vacuum in the main pump body,
priming the main pump. Once primed, as
indicated by water discharging to the ground
from the priming pump outlet, the push-button is
released. Once push-button is released, the
priming pump stops running allowing the Hale
SPV to close for normal pump operation.
The Hale Semi-Automatic Priming Valve (Hale
SPV) (shown in figure 1) is a diaphragm
operated type valve that opens using the
vacuum generated by the priming pump. The
Hale SPV mounts directly to the priming
connection of a Hale midship pump.
Additionally, a universal adapter that bolts to an
installer supplied bracket is available to permit
use of the Hale SPV on booster and volute type
pumps. The installer must also supply hose
connections from the adapter to the pump
priming connection. The Hale SPV operates
from the vacuum generated by the priming
pump when the momentary contact push-button
located on the pump operator panel is
depressed. The Hale SPV conforms to NFPA
requirements for priming time and hydrostatic
test when bolted to Hale midship type pumps.
Each valve is factory tested to 24 in (610 mm)
hg vacuum and 600 PSIG (41 BAR).
When used on a midship fire pump, the valve
mounts to the pump body with two studs and
nuts, standard strainer and seal ring. Mounted
on the midship fire pump, in close proximity to
the priming pump, only a short length of
3
/
4
inch