Knife Gate Valve

‌Knife gate valve, also known as knife-shaped gate valve or slurry valve, is a gate valve whose movement direction of discs (gate plates) is perpendicular to the fluid direction. It has the advantages of simple and compact structure, reasonable design, light weight and material saving, reliable sealing, light and flexible operation, small volume, smooth passage, small flow resistance, light weight, easy installation and easy disassembly‌.

Design Standard: JB/T8691

End Flange: ASME B16.5 / JIS B2220 / DIN 2543

Face to Face: ASME B16.10 / JISB2002 / BS EN558-1

Inspection and testing: API598

1. The knife gate valve adopts a wafer connection method. The length of the valve body is short and the gate disc is thin. There is a knife-shaped oblique cut at the bottom of the gate, which can cut off fibers in the medium. This design makes the knife gate valve suitable for transporting wet or dry media such as slurry, coal slurry, ore powder, dry ash, coal powder, pulp, slurry, material-water mixture and material-gas mixture‌.

2. The design feature of the knife gate valve is that the valve flap can be opened and closed perpendicular to the flow direction of the fluid. In the closed state, the valve flap completely blocks the flow path of the pipeline, thus realizing the effect of cutting off the flow direction of the fluid. This characteristic makes the knife gate valve very effective in situations where it is necessary to cut off the flow of media‌.

3. The structure of knife gate valves is relatively simple, usually with only one valve clack and one manual operation device. This simple construction makes the knife gate valve easy to maintain and operate‌.

4. The knife gate valve can be opened and closed quickly and has a fast response speed, especially suitable for emergency applications.

5. Knife gate valves should include knife-shaped gate valves, pneumatic knife gate valves, split knife gate valves, and sealed knife gate valves.

• Knife gate valves are widely used in sewage treatment, mining, metallurgy, chemical industry, electric power and other industrial fields, especially suitable for media with more suspended particles‌.

• The sealing performance of the knife gate valve is excellent, mainly due to its metal or elastic material sealing gasket. These gaskets can effectively prevent media leakage and improve equipment operation efficiency‌.

• The sealing surface of the knife plate and base of the knife gate valve is made of hard materials, allowing it to adapt to high-speed flow, high viscosity and particulate media, extending the service life of the valve‌.

• Since the valve clack is in the shape of a flat plate, the knife gate valve is suitable for high-viscosity media and liquid-solid two-phase media, and is not prone to clogging‌.

Knife gate valve

1) Design Standard: JB/T8691

2) End Flange: ASME B16.5.DIN 2543.GB/T12238,GB9113

3) Size: 2"-20"

4) Pressure: 150lb~300lb

5) Temperature: 120℃

6) Materials: Carbon steel,Stainless steel

7) Suitable Medium: Water,Oil,Gas

Q1: What is the installation space of knife gate valve?

A1:‌Knife gate valves are compact and occupy less space, making them suitable for installation in limited space piping systems‌.

Q2: What is the sealing performance of knife gate valves?

A2: Knife gate valves usually have two-way sealing performance, which can prevent media leakage in both directions and ensure the safe operation of piping systems‌.

Q3: What is the control method of knife gate valve?

A3: In addition to manual operation, it can also be equipped with pneumatic devices to achieve quick cutting.