Good quality, low price, durable national standard soft seal gate valve, gate valve manufacturer

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Soft seal gate valves are divided into open stem soft seal gate valves and concealed stems There are two types of soft seal gate valves. Usually there is a trapezoidal thread on the lifting rod that changes the rotational motion into linear motion through the nut in the middle of the gate plate and the guide groove on the valve body, that is, the operating torque is converted into operating thrust. When the valve is opened, when the gate lift height is equal to: times the diameter of the valve, the fluid channel is completely unobstructed, but this position cannot be monitored during operation. In actual use, the top of the valve stem is used as a mark, that is, the position that does not open is used as its fully open position. In order to consider the locking phenomenon due to temperature changes, the valve is usually opened to the top position and then retracted /- turn as the fully open valve position. Therefore, the fully open position of the valve is determined by the position of the gate (i.e. stroke). This type of valve should generally be installed horizontally in the pipeline.
General requirements for national standard soft-sealing gate valves
, specifications and categories of soft-sealing gate valves Should comply with the requirements of pipeline design documents.
, The model of the soft seal gate valve should indicate the national standard number requirement. If it is an enterprise standard, the relevant description of the model should be indicated.
, The working pressure requirements of the soft seal gate valve for the pipeline The working pressure that the valve can withstand without affecting the price should be greater than the actual working pressure of the pipeline. Either side of the soft seal gate valve should be able to withstand . times the working pressure value of the valve when it is closed without leaking when the valve is open. The valve body should be able to withstand twice the working pressure of the valve.
The manufacturing standard for soft seal gate valves should indicate the national standard number it is based on.