China Suppliers Factory DI/WCB/SS Knife Gate Valve with Rubber/Metal Seal for Wastewater and Mining Applications

The blade-like gate is typically crafted from high-grade stainless steel or tungsten carbide to offer exceptional wear resistance. The valve body can be constructed from Ductile Iron, Carbon Steel, or Stainless Steel, and may feature protective linings made of rubber, polyurethane, or PTFE to enhance sealing and prevent clogging.

Unlike standard gate valves, a knife gate valve features a sharp, wedge-shaped gate that acts as a cutting element to slice through thick media. Its streamlined design minimizes dead zones, which significantly reduces the risk of material buildup and clogging when handling slurries or solids.

Knife gate valves are ideal for wastewater treatment, mining, and food processing. They are specifically used to isolate or regulate flows of viscous, abrasive, or particle-laden media, such as mineral slurries, sludge streams, and fluids containing sediments or fibrous materials.

Knife gate valves can be operated manually using a handwheel (rotating clockwise to close and counter-clockwise to open). For automated or large-scale control systems, they can also be equipped with pneumatic or electric actuators.

To prevent damage and ensure longevity, you should avoid dry operation, which protects the internal protective lining. Additionally, always make sure the blade is fully seated when closing the valve to prevent media leakage.