Knife Gate Valve

The Knife Gate Valve Manufacturer!

We-SQ Technology is a specialized industrial valves supplier and exporter in Wenzhou,China, focus on supplying integrated solutions for industrial valves which are applied broadly in petroleum, chemical, metallurgical power generation, mining and water treatment industries.

Ceramic knife gate valve

Ceramic knife gate valve is a ceramic-on-ceramic seated valve designed for use in slurry services. It was designed to replace standard knife gate valves in service without piping modifications and

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Metal Seated Knife Gate Valve

Metal seated unidirectional Cast Stainless Steel Knife Gate Valves are designed for applications in corrosive, abrasive liquid slurry or dry material applications including: Pulp & Paper, Mining,

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Urethan knife gate valve

Urethan knife gate valve has the opening and closing member of the gate, and the direction of movement of the gate is perpendicular to the direction of the fluid.

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Slurry Knife Gate Valve

Slurry Knife Gate Valve is designed for heavy duty purposes to isolate flow, even in the most demanding process conditions. The complete valve is built around an ease of maintenance concept.

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resilient seated knife gate valve

Bi-Directional Resilient Seated Knife Gate Valves are designed for isolation, on-off applications in corrosive, abrasive liquid applications in Pulp & Paper, Mining, Waste Water, Chemical,

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Why Choose Us

Our certificates

We launched our quality management as ISO 9001, and awarded API 6D,API 600, API 607,CE/PED approvals for the products .And we are making continuous improvement on our product performance and quality control all the time.

Dedicated Customer Service

Our customer service team is committed to providing exceptional support and addressing any concerns promptly. We prioritize clear communication and proactive problem-solving to ensure a seamless experience for every client.

Versatility in Applications

One of the key advancements in industrial ball valves is their increased versatility. These valves are now designed to handle a diverse range of applications, from general-purpose use to specialized industries such as petrochemicals, oil and gas, water treatment, and more. Their adaptability makes them a go-to solution for various industrial fluid control needs.

Advantages of Using a Knife Gate Valve

Efficiency in Handling Viscous Materials
The knife gate valve is designed to handle viscous materials and fluids that contain solid particles such as slurry and sludge. The knife blade cuts through the materials easily, preventing clogging.

Compact Design
The knife gate valve typically has a compact design and short face-to-face length, making it easier to install in tight spaces.

Low Cost

Compared to other types of gate valves, the knife gate valve is less expensive in manufacturing, installation, and maintenance.

Ease of Maintenance

Maintenance and repair are generally easier and less costly due to the simple design of the knife gate valve.

Better Flow Control

The knife gate valve provides better flow control when dealing with dense fluids compared to traditional gate valves.

Types of knife gate valves

Through conduit knife gate valve

This is a valve that has high fugitive emissions. This type of valve is suitable for use in applications where there are scales that aid in preventing fluid leakage. This type of valve is designed with two seats and top and bottom gland packing.

Hopper shape knife gate valve

This is a valve that has a hopper component at the top. This valve is suitable for handling bulk media. Hopper shape knife gate valve manufacturers design this valve for use in applications such as mining, food, and chemical industries. This valve has the seat positioned in the reverse to prevent seat wear, and valve blockage as well as make it easy to close.

Rising stem knife gate valve

This is a knife gate valve in which the stem rises above the handwheel when the valve is being opened. When the valve is closed, the stem moves downwards. This type of valve is convenient to the valve operator as it is easy to know when the valve is closed or when it is opened. However, this type of valve occupies a lot of space and it is recommended for use in applications where space is not limited.

Non-rising stem knife gate valve

This is a knife gate valve in which the stem does not rise above the handwheel when the valve is opened. This type of valve is designed with an indicator that helps to know when the valve is closed or is opened. This valve is suitable for use where space is limited since it does not occupy a lot of space like the rising stem type.

Knife Gate Valve Parts

Valve Body

It is usually made of a strong material such as cast iron or stainless steel and contains a flow channel for the fluid.

Knife Gate

It is a thin plate that has a sharp edge resembling a knife. It rises and lowers inside the valve to allow or block the flow of the fluid.

Actuation Mechanism

A rising stem or screw can be used to lift and lower the knife gate. The actuation mechanism can be manual or pneumatic/electric.

Seat Seal

It surrounds the perimeter of the flow channel and provides a bi-directional and airtight seal.

Applications of Knife Gate Valve

Mining Industry
In the mining industry, knife gate valves are used for abrasive slurry applications such as mine tailings, hydro cyclone feed, and thickener overflow. They are suitable for handling abrasive and corrosive media, commonly found in mining operations.

Pulp and Paper Industry
The pulp and paper industry uses knife gate valves for handling slurries such as wood pulp, paper stock, and black liquor. Knife gate valves are ideal for this industry because of their ability to slice through thick and viscous fluids, as well as their resistance to clogging and fouling.

Wastewater treatment plants
In wastewater treatment plants, knife gate valves are responsible for isolating and controlling sludge and other waste materials. The valves are designed to handle the challenging environments and corrosive fluids present in wastewater treatment facilities.

Food and Beverage Industry
The food and beverage industry uses knife gate valves for handling dairy products, sauces, and other viscous materials. The valves are ideal for food processing applications because they are easy to clean and can cut through high-viscosity fluids.

Chemical and petrochemical industry
In the chemical and petrochemical industry, knife gate valves are used for handling corrosive and hazardous materials such as acids, caustics, and solvents. The valves are of a robust construction making them suitable for use in chemical and petrochemical plants.

FAQ

Q: Do knife gate valves leak?

A: A knife gate has the greatest amount of leakage, because when the knife gate is open, there is no airlock, only when you close the knife gate will you achieve an airlock. A rotary valve provides a good, steady airlock but in order for the rotor to turn, there must be a gap between the rotor and the housing.

Q: Do knife gate valves have a flow direction?

A: The knife gate valves are unidirectional, respect the flow direction indicated on the body by the arrow.

Q: How do you test a gate valve for leakage?

A: Open the gate plate. Allow the system pressure in the valve to rise to the specified value. Close the gate plate. Open the blind plate on one side to check the sealing surface for leakage.

Q: Can knife gate valves be installed horizontally?

A: Fabricated Material Handling Knife Gate Valves are specifically designed to be used on dry bulk materials where the valve is installed horizontally in a vertical pipe. A displacement pocket is provided which enables the valve to close through a standing column of packed material.

Find professional knife gate valve manufacturers and suppliers in China here. We're offering high quality knife gate valve with competitive price. Welcome to contact our factory for more details.

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