In ISO6953 and GB/T20081, there is a disadvantage that two measuring devices must be used for determination of the flow rate characteristics of pneumatic regulators with forward flow and relief flow characteristics. A new set of measuring device and method was proposed herein, which made use of an electric regulator with large relief function as the load pressure and flow regulation device and a dual directional flow meter. With the continuous conditionings from maximum forward to maximum relief flow, pressure and flow rate, as well as flow rate characteristics can be obtained in real-time. This will simplify the measuring circuit, avoid measurement instrument exchange and the caused errors, improve the test efficiency and save the amount of used air.

pneumatic regulator;flow rate characteristics, continuous measurement, energy saving

ISO6953和GB/T20081中，测量带溢流机能的气动减压阀的流量特性时正向流和溢流两个测试过程需分开进行，为此提出采用带大溢流功能的电控减压阀作为被测减压阀负载压力和流量的调节器件，并采用具有双向流量测量功能的流量计，通过正向最大流量到溢流向最大流量的连续设定，实现压力和流量的连续测量，从而测出减压阀的流量特性，简化了实验回路，减少了测试设备的交换及其产生的测量误差，提高了测试效率，节省了空气使用量。

气动减压阀, 流量特性, 连续测量, 节能