National Standard Bevel Gear Drive Soft Sealed Gate Valve
The soft sealing gate valve of bevel gear drive is mainly used to connect or cut off the medium in the pipeline. The gate valve is suitable for a wide range of pressure, temperature and caliber, especially for medium and large caliber pipelines, and is not corroded by fluids. The relative movement between sealing surfaces is small, and it is not easy to scratch. It is mostly used for medium and large caliber of low, medium and high pressure.
Soft-sealed gate valves are divided into open-rod soft-sealed gate valves and dark-rod soft-sealed gate valves. Usually there are trapezoidal threads on the lifting rod. Through the nut in the middle of the gate and the guide groove on the valve body, the rotational motion is changed into linear motion, that is to say, the operating torque is changed into the operating thrust. When opening the valve, when the gate lifting height is equal to 1:1 times the valve diameter, the flow passage is smooth, but when running, this position can not be monitored. In practical use, the vertex of the valve stem is used as the sign, that is, the position of the valve stem that is not moving is used as its full open position. In order to consider the locking phenomenon of temperature change, the valve is usually opened to the vertex position and reversed to 1/2-1 turn as the position of the fully open valve. Therefore, the full open position of the valve is determined by the position of the gate (i.e. stroke). Valves of this type shall generally be installed horizontally in pipes.
