行程:20mm泄漏率:Kvs值的0...0.02%介质温度:-25...140°C阀门流量特性:等百分比阀门可调比:DN15:>50:1DN20...50:>100:1允许工作压力:1600Kpa阀体:青铜C***91K(Rg5)阀门内件材料:铬镍钢/黄铜Rg5)