Knife type slurry valve, also known as knife gate valve, is a new type of valve composed of a gate valve for opening and closing. The movement direction of the gate valve is perpendicular to the fluid direction, and the medium is cut off by a blade shaped gate valve that can cut fiber materials. The gate valve has two sealing surfaces, and the two sealing surfaces of the most commonly used mode gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 50. The gate valve of the wedge type knife gate valve can be made as a whole, called a rigid gate valve; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate. The valve body actually does not have a chamber, and the gate plate rises and falls in the side guide groove, and is tightly pressed against the valve seat by the bottom protrusion. If high medium sealing performance is required, an O-shaped sealing valve seat can be used to achieve bidirectional sealing.
At present, the conventional parameters of domestic knife type slurry valves are as follows:
Valve body material: cast iron, cast steel, stainless steel
Valve Plate Material: 304316
【 Sealed valve seat 】: PTFE, welded STL
Pressure rating: 0.6-2.5MPa
[nominal diameter]: DN50-DN1200
[Structural Form]: Flat Plate Type
[Connection Method]: Clamp,
[Voltage Range]: 380V/660V 50/60HZ DC24V/12V+10% to -10%
[Temperature Range]: PTFE: -30~150 ° C, WCB: -30~425 ° C, 316L: -30~900 ° C
Electric actuator: switch type, adjustable type; Integral type, explosion-proof electric actuator
