节流式减压阀(调节阀)是石油化工企业中应用最广泛的一种节流部件。在一个大的装置(或车间)中虽然它只是其中一个小小的组合件,但大部分工艺所需参数都是由它来实现的。而且,在保证系统安全可靠上起着重要作用,然而由节流减压本身引起的能量损失却往往被人们所忽视。节流过程是指流体在管内连续流动时流经一个开度被控制的阀门(小孔)或多孔塞,或 Throttle-type pressure reducing valves (regulating valves) are the most widely used type of throttling components in petrochemical companies. Although it is only a small assembly in a large installation (or workshop), most of the parameters required for the process are achieved by it. Moreover, it plays an important role in ensuring the safety and reliability of the system. However, the energy loss caused by throttling and decompression itself is often overlooked. A throttling process is defined as the flow of fluid through a valve (pinhole) or porous plug whose opening is controlled while it is continuously flowing within the tube, or