Pressure Sustain Valve

Pressure sustain & Relief Valves 1.5" , 2" and 3" Plastic body with pressure adjustments .

Pressure Sustaining Valves (PSV) sense the upstream pressure and compare it to the setpoint to determine the valve position in order to maintain a set pressure upstream. As the upstream pressure rises the valve starts to open allowing flow downstream and if it falls below the setpoint the valve will shut. The use of these valves enables the prevention of pressure starvation to upstream processes in the event of a major consumption downstream. They can also be used to balance pressures in a ring circuit.

Pressure Sustaining Valves (PSV)

A Pressure Sustaining Valve (PSV) is used to maintain a set pressure at a specific point in the pipe network. The valve can be in one of three states.

• Partially opened (i.e., active) to maintain its pressure setting on its upstream side when the downstream pressure is below this value.
• Fully open if the downstream pressure is above the setting.
• Closed if the pressure on the downstream side exceeds that on the upstream side (i.e., reverse flow is not allowed).