Hale MBP Booster - Manual (Page 24)

23 Silencer Series Booster Pump, p/n: 029-0020-83-0
Introduction
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Figure 2-9: PVG Priming Valves
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 a P25, P30 or P30V relief valve. (See Figure 2-10: “P Series Relief
Valve System Arrangement.”)
Figure 2-10: P Series Relief Valve System Arrangement