原文：
呼吸阀的特点及性能： 呼吸阀的阀体能承受0.2Mpa的水压，无渗透和变形现象。呼吸阀耐低温性能在空气相对湿度大于70%，{zd1}温度为-30℃时，经过24小时的冷冻后，其阀盘开启压力符合工作压力要求，（允许压差正负20pa）。 　GTQ型通气管的阀盘部件动作时，灵敏度高，动作完成后，保证密封。呼吸阀阀内留有足够的空间，保证储罐的通气量。呼吸阀没达到工作压力以前：公称通径≤150mm，其泄漏量≤0.04m3/h；公称通径≥220mm，其泄漏量≤0.4m3/h；当呼吸阀达到了工作压力以后：阀盘立即开启，保证储罐正常的通气要求。 　主要规格 / 特殊功能： 　特点及性能： 　新型管道阻火器材质采用>：铸铁、铸钢、不锈钢、铝合金、耐腐蚀性好。阀盘、阀封环采用不锈钢四氟乙烯材料。耐低温，防冻性能好。该阀是安装在固定顶罐上的通风装置，减少油品蒸发损耗，控制储罐压力作用。本阀具有通风量大，泄漏量小，耐腐蚀，防冻性能好。它能对石油储罐内外压着进行自动调节等特点。 　 燃气阻火器结构简单，重量轻，易检修，安装方便。水压试验合格。耐低温防冻通性合格：在-42℃操作2小时，压力阀盘、真空阀盘和密封环均无变形现象。xx符合标准要求。在常温36℃时连续操作72小时，动作10000次，压力阀盘、真空阀盘和导杆接触面无任何磨损和碰伤迹象，导杆升降灵敏无卡死现象。

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译文：
Breathing valve features and performance: Breathing valve body can withstand 0.2Mpa water pressure, no infiltration and deformation phenomena. Low temperature resistance breathing valve in the air relative humidity above 70%, when the minimum temperature is -30 ℃, after 24 hours of freezing, its valve opening pressure plate pressure to meet work, (to allow pressure plus or minus 20pa). GTQ-type ventilation tube when the valve disc movement components, high sensitivity, action is completed to ensure the seal. Valve valve with sufficient breathing space to ensure the tank ventilation. Working pressure breathing valve did not reach previous: nominal diameter ≤ 150mm, the leakage ≤ 0.04m3 / h; nominal diameter ≥ 220mm, the leakage ≤ 0.4m3 / h; when the breathing valve to the pressure after the work: valve plate immediately open, to ensure the normal tank ventilation requirements. Specifications / Special Features: Features and performance: Use the Materials for New Pipeline Fire: cast iron, cast steel, stainless steel, aluminum alloy, good corrosion resistance. Valve plate, valve seal ring made of stainless steel PTFE material. Low temperature, freezing good performance. The valve is installed in the fixed roof tank ventilation to reduce the evaporation loss of oil control tank pressure. The valve has a ventilation volume, a small amount of leakage, corrosion, freezing good performance. Crimping both inside and outside the oil tank can be automatically adjusted and so on. Gas flame arrester simple structure, light weight, easy maintenance, easy installation. Pressure test pass. Pass the connection of low temperature freezing: 2 hours operation in -42 ℃, the pressure valve plate, the vacuum valve disk and no deformation of sealing ring. Full compliance with standards. At room temperature 36 ℃, 72 hours continuous operation, action, 10,000 times, the pressure valve plate, the vacuum valve disk and the guide bar contact surface without any signs of wear and bumps, guide rod stuck down the phenomenon of non-sensitive.