变压器用压力释放阀完全执行行业标准 JB/T7065-2015
该压力释放阀适用于变压器、电力电容器、有载开关、压力容器罐等,用来保护油箱和容器罐。
一, 如何选用压力释放阀？how to Selected pressure release valve ? a 、喷油口径的选用 Selection of Spray oil -caliber : 油箱内油量(Oil mass of oil box)： ＜ 1.5T 1.5T～4.5T 4.5T ～11.5T 11.5T ～ 23T 阀口径(Effective -caliber of valve)： ∮25 ∮50 ∮80 ∮130 如果油量过 23T 可按下式选择：If the oil can be pressed more than 23T Selection ∮130 口径压力释放阀的数量 = 总油量重量 T / 23T ∮130 caliber pressure release valve number = total weight of oil T / 23T b 、压力释放阀开启压力的选择 Pressure release valve opening pressure of the choice： 开启压力等级的选择决定于关闭压力的大小,关闭压力 PG 按下式计算： The choice of opening pressure level determined by the size of the pressure off, close the pressure of PG determined by the formula: PG = PH + PK + PQ 其中 Among them ：
PH = 压力释放阀承受静压值 Pressure release valve to withstand static pressure values ( V×H ) KPa V 是指变压器油柱压 Refers to the transformer oil column pressure 8．9 KPa / m H 是指高油面至阀座底面的距离 Refers to the maximum of oil to the distance from the bottom seat(m) PK 是附加的安全裕度压力,一般取 Is an additional margin of safety, the general public to take 5 ～ 7 KPa PQ 是附加的强油、风冷裕度压力,一般取 There is an additional strong oil, air-cooled margin, the general public to take 5 ～ 7 KPa 求得关闭压力 PG 后 , 通过下表（基本技术参数）可知道开启压力值。 PG obtained after the closure of the pressure, by the following table (basic technical parameters) can be aware of the value of opening pressure
技术参数
开启压力 Opening pressure (KPa)：55
口径 Effective aperture (mm)：50