The respiration valve body can withstand the 0. 2 mpa water pressure, no penetration and deformation phenomenon. Breathing valve low temperature resistance in the air relative humidity is more than 70%, the lowest temperature of - At 30 ℃, after 24 hours of frozen, the opening pressure of the disc conform to the requirements of the job stress, ( Allow the differential plus or minus 20 pa) 。 GTQ type vent valve parts gesture, high sensitivity, after the completion of the action, ensure the seal. With sufficient space within the breathing valve, to ensure that the tank ventilation. Before I go to work pressure breathing valve: nominal diameter 150 mm or less, the leakage 0 or less. 04 m3 / h; Nominal diameter 220 mm or more, the leakage 0 or less. 4 m3 / h; When reached the working pressure after breathing valve: valve plate immediately open, ensure the normal order of the tank ventilation requirements. Main specifications/features and performance: the new pipe flame arrester material used: cast iron, cast steel, stainless steel, aluminum alloy, good corrosion resistance. disc, valve sealing ring is made of stainless steel material of tetrafluoroethylene. Low temperature resistant, antifreeze performance is good. This Industrial Valves is installed on the fixed roof tank ventilation device, reduce loss of oil product evaporation tank pressure control. This Industrial Valves has a large air quantity, small amount of leakage and corrosion resistant, antifreeze performance is good. It can be carried out on the oil storage tank inside and outside pressure automatic adjustment, etc. Gas flame arrester has simple structure, light weight, easy maintenance, easy installation. Water pressure test. Low temperature resistant antifreeze connectivity: qualified in - 42 ℃ for 2 hours, operation pressure valve, vacuum Industrial Valves plate and seal ring are no deformation phenomenon. Completely accord with a standard to ask. 72 hours continuous operation at normal temperature of 36 ℃, 10000 times, pressure valve, vacuum valve plate and guide bar interface without any signs of wear and bruised, guide rod no stuck phenomenon.
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