四分之一转类型的阀门会受到阀门中的流动力以及带有致动器的阀盘旋转产生的应力和扭矩的影响。本文讨论了阀门可能承受的不同类型的扭矩，重点介绍了使用动态流量扭矩系数来预测和评估流量扭矩。推导了扭矩系数，该系数考虑了不同尺寸阀门的几何变化。该系数还利用了损失系数和气体膨胀的修正系数。描述了一种针对不同阀门尺寸和损失系数校正流量扭矩系数的方法和比例因子。包括各种阀门类型的扭矩系数示例和图表。 包括6个参考文献、图表。

Quarter-turn types of valves are subject to stresses and torques produced by the flow forces in the valve and by the rotation of the valve disk with an actuator. This article discusses the different types of torque to which a valve can be exposed, focusing on the use of dynamic flow torque coefficients to predict and evaluate flow torque. The derivation of a torque coefficient that incorporates the variation of geometry for different sizes of a valve is presented. The coefficient also utilizes a correction factor for the loss coefficient and gas expansion. A method and a scaling factor to correct flow torque coefficients for different valve sizes and loss coefficients are described. Several examples and plots of torque coefficients are included for various valve types. Includes 6 references, figures.