若介质温度较高时，为了降低弹簧腔室的温度，一般当封闭式安全阀使用温度超过300℃及敞开式安全阀使用温度超过350℃时，应选用带散热器的安全阀；
9、若安全阀出口背压是变动的，其变化量超过开启压力的10%时，应选用波纹管安全阀；
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