Valve Sizes(节流系数) 阀瓣部分开启时可用于节流应用。用节流系数乘于流量系数。 注意:闸阀不能用于节流。 (THROTTLING FACTORS) For throttling use with disc partially open. Multiply Cv by factor. NOTE:Gate valves are not throttled. 通径(毫米) ...