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Manual knife gate valve



Manual knife gate valve

The opening and closing member of the knife type gate valve is a gate plate, and the movement direction of the gate plate is perpendicular to the fluid direction. The manual knife type gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The gate has two sealing faces. The two sealing faces of the most commonly used mode gate valves form a wedge shape. The wedge angle varies with the valve parameters, usually 50. The gate of the wedge knife gate valve can be made into a whole, called Rigid ram; can be made into a ram that can produce a small amount of deformation to improve its processability, to compensate for the deviation of the sealing surface angle during the processing, the sealing surface can be sealed by the medium pressure when the elastic knives are closed. The sealing surface of the ram is pressed against the valve seat on the other side by the medium pressure to ensure the sealing of the sealing surface. When the valve is closed, the damper is forced to press against the valve seat by external force to ensure the sealing of the sealing surface.


       Precautions and features of the manual knife type gate valve: The opening and closing part of the knife type gate valve is the ram. The movement direction of the ram is perpendicular to the fluid direction. The knife type gate valve can only be fully open and fully closed. And throttling. The gate has two sealing faces. The two sealing faces of the most commonly used mode gate valves form a wedge shape. The wedge angle varies with the valve parameters, usually 50. The gate of the wedge knife gate valve can be made into a whole, called The rigid ram can also be made into a ram that can produce a small amount of deformation to improve its processability and compensate for the deviation of the sealing surface angle during the machining process. This ram is called the elastic ram knife type gate valve when closed, the sealing surface It can be sealed only by the pressure of the medium, that is, the sealing surface of the ram is pressed against the valve seat of the other side by the pressure of the medium to ensure the sealing of the sealing surface. This is self-sealing. Most of the knife-type gate valves are forcibly sealed, that is, When the valve is closed, it is necessary to force the ram to the valve seat by external force to ensure the sealing of the sealing surface.