前言在液压回路中,减压阀用在二次回路压力低于一次回路压力的场合。减压阀的响应性受一次回路容积、二次回路容积等的影响。若是响应性过差,会产生异常的冲击压力,成为妨碍回路正常机能的主要原因。减压阀分为平衡活塞式和直动式两种,一般来说直动式响应性好。 Preface In the hydraulic circuit, the pressure reducing valve is used when the secondary circuit pressure is lower than the primary circuit pressure. The response of the pressure relief valve is affected by the volume of the primary circuit and the secondary circuit volume. If the response is too poor, there will be abnormal impact pressure, become a major obstacle to the normal function of the circuit. Pressure reducing valve is divided into two types of balanced piston and direct acting, in general, direct acting response.