The opening and closing parts of the dark rod elastic seat seal gate valve are the gate plate. The movement direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valve form a wedge. The wedge angle varies with the valve parameters, usually 50, and the medium temperature is not high, it is 2 ° 52 ''''. Wedge gate valve gate can be made into a whole, called a rigid gate; can also be made to produce micro deformation of the gate, in order to improve the process, make up for the sealing surface angle in the process of deviation, this gate called elastic gate, generally flange connection.

Product introduction:

Elastic seat seal gate valve is also called lifting rod gate valve (also called open rod gate valve). Usually in the lifting rod on the trapezoidal thread, through the top of the valve nut and the valve body on the guide groove, the rotary motion into a linear motion, that is, the operating torque into the operating thrust. When the valve is opened, when the gate lift height is equal to 1:1 times the diameter of the valve, the fluid channel is completely unobstructed, but during operation, this position cannot be monitored. In actual use, the apex of the valve stem is used as a sign, that is, the position that does not move, as its fully open position. In order to consider the locking phenomenon of temperature change, it is usually turned back to 1/2-1 circle at the top position as the position of fully open valve. Therefore, the fully open position of the valve is determined by the position of the gate (I. e. stroke>.

General requirements:

1. The specification and type of the elastic seat seal gate valve of the dark rod shall meet the requirements of the pipeline design documents.

2. The type of elastic seat seal gate valve shall be indicated on the basis of the national standard number requirements. If it is an enterprise standard, the relevant description of the model should be indicated.

3. The working pressure of the dark rod elastic seat seal gate valve is required to be ≥ the working pressure of the pipeline. On the premise of not affecting the price, the working pressure that the valve can bear shall be greater than the actual working pressure of the pipeline. Any side of the dark rod elastic seat seal gate valve shall be able to withstand 1.1 times the valve working pressure without leakage. When the valve is opened, the valve body shall be able to withstand twice the valve working pressure.

4. The manufacturing standard of the elastic seat seal gate valve of the dark rod shall indicate the national standard number on which it is based. If it is an enterprise standard, the enterprise document shall be attached to the purchase contract.