The emergency vent manhole is a rapid pressure relief device that prevents accidents caused by sudden overpressure or vacuum inside the tank, especially suitable for storing materials in nitrogen sealed dome pressure tanks. It has the advantages of constant pressure discharge, constant pressure suction, flexible opening and closing, compact structure, good sealing performance, safety and reliability.
Main technical parameters:
• Suitable for the storage of various materials such as petroleum, chemical, pharmaceutical, energy, special liquids or gases;
• Operating pressure:+ 1500mmH2O;
• Shell material: carbon steel, stainless steel: SUS304、SUS304L、SUS316、SUS316L、 Lining, etc;
• Valve disc and seat materials: aluminum alloy, stainless steel, etc;
• Sealing material: nitrile rubber, polytetrafluoroethylene, metal gasket, etc;
• Flange standard: HG20592-97 PN1.0, Or GB, SH, HGJ, JB, ANSI, JIS, etc;
• Manufacturing and testing standards: Manufacturing and acceptance shall be carried out in accordance with standards such as SY7511-96 for oil tank breathing valves, GB5908-86 for fire resistance performance and test methods for oil tank flame arresters, or customer specified standards.
Ordering Notice:
Please specify detailed parameters such as product name, nominal diameter, pressure rating, material, flange standard, and operating pressure when placing an order. The above product parameters are for reference only. Our company can order processing according to user requirements. Please feel free to call or write to us.