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Contact Supplierfeatures:- 1. The flashboard has two sealing faces. The most commonly used flashboard has a wedge formed by two sealing faces. The wedge angle varies with valve parameters, usually 5°. 2. The sealing principle of a wedge gate valve is to seal through close connection of the wedging of two sealing faces of flashboard and two sealing faces of the valve body. 3. Valve body and valve cover may be connected by bolts, pressure self-tight sealing or welding. 4. The flashboard is solid.