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1. Liquid-pressure style safety valve isa assistant equipmentof the breathing valve (moving discstyle), the active pressure of aspi-ration and expiration is higher than breathing valve (moving disc style), as upon once the breathing valve does not work in winter,themoving disc willbe frozen, the liquid seal ofthe liquid-pressure style safety valve can be broken forprotecting the oiltank.
2. Liquid-pressure safety valve will be installed in top of oil tank and assorted used with breathing valve.
3. The controlpressure: +56mm watercolumn to -50mm water column.
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GYA系列用途 Usage1、液压式安全阀是（活瓣式）呼吸阀的安全备用设备，它的吸气和呼气的动作压力略高于（活瓣式）呼吸阀，在呼吸阀一旦失灵或在冬季其活瓣冻结时，液压安全阀的液封即被破坏从而保护油罐免遭破坏。