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1. High Performance, 2. Competitive Price, 3. Prompt Delivery, 4. Perfect After-sale Service - details see: https://www.machineto.com/high-performance-emergency-pressure-vacuum-relief-valve-china-10283104

Emergency Pressure/Vacuum relief valve is designed to provide emergency relief capacity beyond that furnished by the normal operationg pressure relief valve on the tank. The valve protects the tank against repture or explosion that could result from excessive internal pressures caused by fire.

Our products features include:

• Size 16", 20" and 24"
• Available material options: aluminum, carbon steel, stainless steel and other materials.
• The inlet and outlet flanges are in acordance with ANSI B16.5 150lb RF ( also can be designed according to users requirement)
• Hinged with lift stop for positive reseating
• Guide sleeves can be provides removable stop and restrict the lift of the cover
• Spring loaded type also avaloble, which is supposed to set on the high-pressure tanks. As excessive pressure builds up, the valvey relieves, then it reseats when the overpressure has been disspated.