There are generally two types of double disc gate vlaves, one is the wedge double disc gate valve (that is, the sealing surface of the gate and the center line of the stem are at a certain angle, there are 2.8° and 5°, different manufacturers have different designs) , The other is the parallel double disc gate valve, the gate sealing surface of this gate valve is parallel to the center line of the valve stem, and the two gates are separated in a K shape.
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