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Pressure and/or Vacuum Relief valves are used for dangerous oil, gas or petrochemical storage tanks and other process vessels or systems to prevent structural damage due to excess pressure or vacuum incoming.

Pilot-operated Pressure/Vacuum Relief Valve is the most suitable for pipe line where high or fluctuating back pressure. Pilot operation is also recommended for equipment to be used when low accumulation rates are required or when set pressure level of valve needs to be closed to the operating pressure level of storage tanks.

• As pressure increase, the pilot maintains its seal tightly, allowing reliable operation closer to the set point, without product leakage.
• Pilot-operated Pressure/Vacuum Relief Valves can work at an operating pressure of up to 98% of set pressure.
• Although initial purchasing costs is high, there is benefits of no leakage, no evaporation loss and less maintenance costs.