HALE DSD, Руководство по эксплуатации и техническому обслуживанию, Страница: 17 / 84

Hale Total Pressure Master (TPM) Relief Valve System
This system, Figure 1-15, includes a sensing device connected to the inlet side of the pump that
works in conjunction with a Pressure Master control on the pump panel to give complete control
over the entire system. The operating point is set by the Pressure Master control. Small changes in
pump pressure are normally handled internally by the recirculating relief valve. Large changes on
either the inlet or discharge side of the pump are controlled by dumping excess pressure to
atmosphere from the discharge side of the pump.
PUMP
DISCHARGE
PRESSURE
WATER TANK
ATMOSPHERE
WATER TANK
Figure 1-15. Hale Total Pressure Master Relief Valve System
PUMP SUCTION
VACUUM
SINGLE PORT
DRAIN VALVES