As a general rule, an adequately sized globe valve (i.e. with pipe velocity between 15 to 25 ft/sec for water and 200 to 300 ft/sec for steam) should not be throttled down below 35% of its maximum full open CV capacity (approximately 20% of full stroke).
As a general rule, an adequately sized globe valve (i.e. with pipe velocity between 15 to 25 ft/sec for water and 200 to 300 ft/sec for steam) should not be throttled down below 35% of its maximum full open CV capacity (approximately 20% of full stroke).
一般而言，通径足够大的截止阀（例如管道内水流速度在15至25英尺/秒之间，蒸汽流速在200至300英尺/秒之间），节流后的流量不应该小于完全开启状态流量（流量系数大约为全冲程的20%）的35%以下。