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Knife gate valve can be driven by sprocket, manual, worm gear, pneumatic, hydraulic and electric. The connection mode can be flange and clamp. The structural form can be round, lug and plum blossom. The sealing structure can be soft seal and hard seal. The pressure range is pn0.1-32mpa. The nominal diameter is dn15-700mm. The material can be cast iron, cast steel and stainless steel.

Introduction to knife gate valve:

Knife gate valve, also known as knife gate valve, is widely used in papermaking, petrochemical, mining, drainage, food and other industries due to its good shearing effect, suitable for slurry, powder, fiber and other uncontrollable fluids. Knife gate valve has a variety of seats to choose from, and can be equipped with electric or pneumatic actuators according to the needs of field control, to achieve the automatic operation of the valve.

Application scope of knife gate valve:

Knife gate valve is suitable for slurry, powder, fiber and other difficult to control fluid, widely used in papermaking, petrochemical, mining, drainage, food and other industries.

Structure features of knife gate valve:

1. The opening and closing parts of knife gate valve are the gate, the movement direction of the gate is perpendicular to the direction of the fluid, and the knife gate valve can only be fully opened and closed, not be adjusted and throttled.

2. The ram has two sealing surfaces. The wedge and wedge angle formed by the two sealing surfaces of the commonly used mode gate valve vary with the valve parameters, usually 50. The wedge-shaped knife gate valve RAM can be made into a whole, which is called rigid ram. It can also be made into a ram that can produce slight deformation, so as to improve its processability and make up for the deviation caused by the angle of the sealing surface during the processing. This kind of gate The plate is called an elastic ram.

3. When the knife gate valve is closed, the sealing surface can only be sealed by the medium pressure, that is to say, the sealing surface of the gate valve is pressed to the seat on the other side by the medium pressure to ensure the sealing of the sealing surface, which is self sealing. Most knife gate valves adopt forced sealing, that is to say, when the valve is closed, the gate shall be forced against the valve seat by external force to ensure the sealing of the sealing surface.

Standard Specification for knife gate valves:

Design and manufacturing standards:

Structural length standard: GB / T 12221-2005

Standard of connecting flange: GB / T 9113

Pressure and temperature rating: GB / T 12224-2005

Test and inspection standard: GB / T 13927-2008

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