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.
P04 Pilot Operated for Liquids
P09 Direct Acting Back Pressure Valves for Liquids and Gases
P26 Direct Acting Low Pressure Valves for Liquids or Gases
P43 Direct Acting Micro Pressure Valves for Liquids or Gases
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Measure Monitor Control
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