Soft sealed gate valve

Soft sealed gate valves not only have the advantages of elastic seat sealing gate valves, but also can visually display the valve opening degree and have a short opening and closing time, so they are often used in fire protection and industrial systems. Generally installed at a higher height above the ground

Soft seal gate valve product features:

1、 Flat bottomed valve seat, no accumulation of dirt, ensuring good sealing performance

2、 The valve disc is entirely wrapped in rubber

3、 The valve internals are made of non rusting steel and copper alloy materials, which can be used in sewage systems to adapt to harsh working environments

4、 Small size, light weight, easy to install and maintain

5、 The valve stem is sealed with three O-rings, which effectively reduces frictional resistance during switching and makes the switch lightweight and leak proof

When the soft seal gate valve is closed, the protruding surface can be sealed only by the working pressure of the material, that is, the protruding surface of the gate valve is pressed against the high-pressure gate valve on the other side by the working pressure of the material to ensure the sealing of the protruding surface, which means self sealing. The vast majority of soft sealed gate valves use mandatory sealingWhen the soft seal gate valve is closed, it is necessary to use external force to forcefully press the gate valve towards the high-pressure gate valve to ensure the sealing of the protruding surface. The gate of a soft sealed gate valve moves uniformly in a straight line with the valve stem, also known as a concealed soft sealed gate valveSoft sealed gate valves generally have trapezoidal threads on the electric push rod, which go through the nut on the top of the gate valve and the guide groove on its oil circuit plate, turning the rotational fitness motion into a uniform linear motion, that is, turning the actual operating torque into actual operating thrust. When the gate valve is opened and the height to width ratio of the soft sealed gate valve is equivalent to 1:1 times the nominal diameter of the gate valve, the fluid dynamics channel is openedHowever, during the operation of soft sealed gate valves, this direction cannot be regulated. In specific applications, the vertex of the valve stem should be used as a marker, that is, the direction in which it cannot be opened, as its full opening direction. To take into account the temperature change and display the locked conditionThere are several common methods for steam leakage in soft sealed gate valves, including the following:1. The relay leakage on the cylinder of the soft sealed gate valve will be caused by the standard air pressure in the pressure reducer being too high2. The exhaust port of the soft sealed gate valve cylinder leaks steam, which is due to the embrittlement of the sealing ring at the sealing point between the two main active components inside the cylinder and the engine block3. The upper and lower sides of the soft sealed gate valve cylinder are leaking steam because the sealing ring at the sealing point between the electric actuator and the cylinder has not achieved the actual sealing effect due to the theme activity of the electric actuator4. In addition to the three situations mentioned above, there is also another situation that can cause the soft seal gate valve cylinder to leak steam, which is the damage of the spring yellow in the cylinder caused by insufficient force, which will also lead to untimely closing