产品描述 Product Description

进口定压止回阀兼有安全止回阀的作用,依靠阀瓣自身的重量、弹簧的作用力及介质压差关闭阀门，防止介质倒流 The imported constant pressure check valve also serves as a safety check valve, relying on the weight of the valve disc itself, the force of the spring, and the pressure difference of the medium to close the valve, preventing medium backflow

工作原理 Working principle

当介质方向流动时，要求该阀门能够自动关闭，但是当介质正向流动时，要求阀门并不是始终处于开启状态，而是要求根据进口管道中的介质压力来确定阀门是否开启，当进口管路中的介质压力低于某个设定值时，要求阀门处于关闭状态，而当进口管路的压力大于某个设定值时，要求阀门能够开启，保证管路安全。

When the medium flows in the direction, the valve is required to automatically close. However, when the medium flows in the positive direction, the valve is not always in the open state. Instead, it is required to determine whether the valve is open based on the medium pressure in the inlet pipeline. When the medium pressure in the inlet pipeline is lower than a certain set value, the valve is required to be in the closed state. When the pressure in the inlet pipeline is greater than a certain set value, the valve is required to be able to open, Ensure pipeline safety

1.当调松调压螺栓，使弹簧处于自由状态时，阀体内的介质通过阀瓣时，阀瓣可绕销轴作旋启运动，介质通过液压缸下盖孔进入活塞下部，将阀杆顶起 When the pressure regulating bolt is loosened and the spring is in a free state, the medium inside the valve body passes through the valve disc. The valve disc can rotate around the pin shaft, and the medium enters the lower part of the piston through the lower cover hole of the hydraulic cylinder to lift the valve stem

2.当弹簧处于压缩状态时，通过活塞将阀杆向下方与摇杆接触，限止阀瓣的运动 When the spring is in a compressed state, the piston contacts the valve stem downwards with the rocker, limiting the movement of the valve disc

主要技术性能（Main technical feature）

1、准确且保持不变的稳定压力，一旦超压，泄压阀能充分打开及时泄压 Accurate and stable pressure that remains constant. Once overpressure occurs, the relief valve can be fully opened and released in a timely manner

2、关闭速度可调，压力波动 Adjustable closing speed and pressure fluctuation

3、隔膜传动机构将操作滞后现象减小 Diaphragm transmission mechanism reduces operational lag

4、它可安装在任何位置，不用改变压力设定值或从管路上拆除就可进行维修和检查 It can be installed in any position and can be repaired and inspected without changing the pressure setting or removing it from the pipeline

主要零件材质 Structure and main component materials