控制回路中气动调节阀的选用

Selection of Pneumatic Control Valve in Control Loop

介绍了气动调节阀选择的几个因素。根据化工生产的工艺条件，选择合适的调节阀结构和类型；根据工艺对象，选择合适的流量特性；根据工艺参数，计算流量系数，选择阀的口径；根据工艺要求，选择材料和辅助装置。

Several factors in selection of valve were introduced. It was pointed out that the suitable valve structure and type should be chosen on the basis of process conditions of chemical production, the suitable flow characteristics should be chosen on the basis of technological object, the flow coefficient should be calculated and the suitable diameter of valve should be chosen on the basis of process parameters, the suitable materials and assist device should be chosen on the basis of process demand.