Hale SPV - Manual (Page 4)

S
emi-Automatic
P
riming
V
alve
2
Figure 1. Hale SPV Valve and Push-Button Switch Assembly
DESCRIPTION
ring. Mounted on the midship fire pump, in
close proximity to the priming pump, only a
short length of
3 /
4
inch (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
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