Product Description
Knife gate valves, also commonly referred to as knife valves, are specifically engineered for the handling of thick liquids, fibrous materials such as pulp, or gases. These valves utilize a blade-shaped gate to control the flow of media, with the gate moving perpendicular to the direction of flow. When closed, the gate's two sealing surfaces form a wedge, ensuring an effective shut-off and minimizing leakage.
Structure
- Valve Body: The valve body typically lacks a cavity and serves as the housing for the gate. It is constructed from materials such as metal or alloy to withstand the working conditions of different media. The body contains a fluid passage and guide grooves for the gate to move within.
- Gate (Blade): The gate is the key component of the knife valve, resembling a blade that slides perpendicular to the fluid channel. It is made of materials like metal or polymer, sometimes with linings to prevent corrosion and wear. The gate forms a seal with the valve seat when in the closed position.
- Operating Device: This device controls the opening and closing of the gate. It can be a manual handwheel, lever, or an electric/pneumatic actuator, depending on the application and requirements.
- Sealing Device: Ensures a good seal between the gate and the valve seat to prevent fluid leakage. Sealing is typically achieved through the compression between the gate and the valve seat. O-shaped valve seats are commonly used for bidirectional sealing.
Sealing Options
- Bidirectional Sealing: Utilizes an O-shaped valve seat for sealing in both directions.
- Rigid or Elastic Gate: Wedge gate can be either rigid or elastic to improve sealing performance.
Features
- Control Options: Knife gate valves can be operated locally or remotely, with customizable position display and centralized control options.
- Lightweight: The carbon steel body is 20%-30% lighter than traditional gate valves, facilitating easier installation and maintenance.
- Performance: Enhances pipeline closure and sealing, significantly reducing leakage and improving production efficiency.
- Material: Sealing surfaces are made of highly wear-resistant and corrosion-resistant ceramic materials, extending the valve's lifespan and enhancing cost-effectiveness.
Performance Chart
Applications
Knife gate valves are widely used in industries such as sewage treatment, chemical processing, mining, and coal ash handling. They are particularly suited for applications requiring quick shut-off of fluids containing particles, fibers, or sludge.
In summary, knife gate valves are versatile and reliable flow control devices that offer precise control and effective sealing for a wide range of media and applications.
Contact Us
Alex Yang
Hebei Minerco Machinery & Equipment Co.,Ltd
Add: No.409,Caizhi Zhongxin,Fuxing Road,Baoding,Hebei,China.
Web: minercos.en.made-in-china.com
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