Automatic Control Valves

Pressure Sustaining Valves

Pressure Sustaining (Retaining) & Relief Valve (PSV)

Pressure sustaining/relief valves are often of the globe type in terms of body design with direct sealing diaphragm.

How Pilot-Operated Pressure Sustaining Valves- Diaphragm Actuated Type work?

The pilot valve detect the inlet pressure through a connection to the valve upstream side. The main valve and the pilot valve remain closed until the inlet pressure exceeds the pilot set point.

In normal operating conditions, the pilot reacts to changes in inlet pressure to control the valve position by regulating the pressure above the diaphragm in the main valve. Once inlet pressure fall below the pilot set point, the main valve will close to ensure that the set point is maintained.

The typical application of the valve will be to protect the pumps and other pipeline components or to ensure satisfactory upstream pressure for critical users.

Description

Pn	10, 16, 25
DN	40-600
Medium	Water \| Effluent water
Application	Transmission pipeline \| Distribution network \| Pumping stations \| Treatment plants \| High-rise buildings \| Pressure management
Specifications	Diaphragm-operated control valve with own-medium control for the regulation of pressure and flow rates in pipeline systems without external power supply. The valve retains a pre-determined inlet pressure. When the upstream pressure is exceeded, the valve opens and permit flow to relieve the excess pressure. The valve is normally closed. With flange ends on both sides according to EN 1092-2 Separate connection of control circuit and pressure gauges Designed to reduce cavitation by using slotted cylinder Body and bonnet of Ductile Iron Diaphragm of EPDM Control circuit and pilot valve body of stainless steel or brass Can be modified to be electrically controlled or pneumatically operated