Pressure seal design without live load bonnet (no spring washers): The gasket bolt tightness must be rechecked after operating test pressure and temperature has been achieved.
Pressure seal design without live load bonnet (no spring washers): The gasket bolt tightness must be rechecked after operating test pressure and temperature has been achieved.
没有动负载阀帽的压力密封结构（没有弹簧垫圈）：在工作试验压力和温度达到限制值时，必须重新检查垫圈螺栓的紧固性。