一、对夹升降式止回阀的流体阻力系数、流量用开启压力公称通径阀门全开启时的流体阻力系数ζ常温下阀门全开启时的水流量系数流体的流向DNNPSKv(m3/h)CV(U.S)CV(U.K)↑↓→开启压力近似的值KPa151/26.42.63.02.5322.5203/45.16.47.56.3322.52514.112.614.812.3322.53211/44.119.723.119.3322.54011/23.829.534.528.9322.55023.554.663.953.5322.56521/23.585.499.983.7322.58033.2128150125322.510042.8244286249322.512552.9375439368312.215063.1522611512312.220083.29151070897312.2)