Application and Structure Characteristics of Manual Knife Gate Valve
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Manual knife gate valves can only be fully opened and fully closed and cannot be adjusted or throttled.
The gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valves form wedges, and the wedge angle varies with the valve parameters, usually 50. The gate of the wedge-type gate valve can be made into a whole, called Rigid shutter
It can also be made into a gate that can produce a slight amount of deformation, in order to improve its craftsmanship, to make up for the deviation of the sealing surface angle in the process of processing, this type of gate is called elastic gate knife type gate valve closed, the sealing surface can only rely on medium Pressure to seal, that is, rely on the pressure of the media to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface. This is self-sealing. Most knife-type gate valves use forced sealing, that is, when the valve is closed, it is necessary to force the gate plate to press against the valve seat in order to ensure the sealing performance of the sealing surface.