Hale ESP Priming System - Manual (Page 12)

❑ Introduction
12 ESP Primer System Instruction Guide
p/n: 029-0810-01-0
2.2 SPV PRIMING VALVE
The Hale Semi-Automatic Priming Valve (SPV) simplifies the priming opera-
tion of your pump allowing for a faster priming time and longer primer life .
The SPV is a diaphragm-operated valve that opens using the vacuum gen-
erated by the priming pump.
Easily activated by a push button control, the SPV starts the primer motor
creating a vacuum. The vacuum acts on the diaphragm in the valve causing
the port to open allowing vacuum. (See Figure 2-2: “SPV Overview.”)
Figure 2-2: SPV Overview
The SPV conforms to NFPA requirements for priming time and hydrostatic
test when bolted to Hale Midship series pumps. Each valve is factory tested
to 26 in. (660 mm) hg. vacuum and 600 PSIG (41 BAR)
Overview
The SPV mounts directly to the priming connection of Hale Midship series
pumps. Additionally, a universal adapter is available to mount the SPV on
Hale Booster and Volute series pumps. The installer must also supply hose
connections from the adapter to the pump priming connection.
When used on a midship fire pump, the valve mounts to the pump body with
two studs and nuts, standard strainer and seal ring.
A short length of 3/4” (19 mm) ID vacuum hose connects the SPV to the
priming pump, eliminating potential leak points in the priming hose.