A Method of ROL Improvement for the Motor Operated Gate Valve Operating in the High Differential Pressure Condition

고차압에서 운전되는 모터구동게이트밸브의 부하율 향상 방안

This paper presents the method of Rate of Loading(ROL) improvement for the Motor Operated Gate Valve operating in high differential pressure condition. The character of ROL and Stem Factor is analyzed. Static test and dynamic test were performed and acquired the diagnosis signal for the valve closing stroke. The result of this study is the modification of stem factor is very important factor for the ROL improvement. In order to obtain the same value of dynamic test thread friction coefficient stem and stem nut should be combined appropriately.