排量是安全阀的主要性能参数之一。压力容器安全监察规程和锅炉安全监察规程对气体和蒸汽介质的安全阀排量计算公式作了规定。在报批的安全阀国家标准中,将采用此计算方法。本文仅就制定的依据作简要说明,供参考。 安全阀的排量计算是建立在收缩喷嘴流体力学基础上的。因为介质 Displacement is one of the main performance parameters of the safety valve. Pressure Vessel Safety Supervision Regulations and Boiler Safety Supervision Regulations on gas and steam medium safety valve displacement formula has been made. In the approval of the national standard safety valve, will use this method of calculation. This article only on the basis of the formulation for a brief description, for reference. Safety valve displacement calculation is based on the contraction of the nozzle on the basis of fluid dynamics. Because of media