Knife Gate Valves, widely used in industrial applications, are a type of flow control valve known for their unique design featuring a sharp-edged gate or blade that effectively slices through and controls the flow of abrasive and viscous fluids, making them ideal for challenging environments such as wastewater treatment, mining, and pulp and paper industries. These gate valves offer a tight shutoff to minimise leakage, come in various sizes to accommodate different pipe diameters, and are often made of materials like cast iron for durability and resistance to corrosion. Their ability to handle high-pressure systems and abrasive materials makes them a dependable choice for fluid control in demanding settings.

Key features and benefits of these valves

Key Features

Sliding gate valves are designed to handle abrasive and viscous fluids, ensuring durability and long-term performance even in harsh industrial environments.

Key Features

These valves provide a reliable tight shutoff, minimising leakage and ensuring efficient flow control, which is essential for industries with stringent fluid containment requirements.

Key Features

Available in various sizes, a knife gate valve can be tailored to fit different pipe diameters and flow rates, making them versatile for a wide range of applications.

Manufacturerd from durable cast iron, these valves are known for their resistance to corrosion and their ability to handle high-pressure systems. Their knife-like gate design enables them to effectively manage challenging materials without clogging, making them a popular choice in industries such as wastewater treatment, mining, and pulp and paper. Whether it's in water treatment facilities or other demanding environments, these valves offer tight shutoff, flexibility in installation, and reliable performance, ensuring minimal leakage and efficient flow control.

Size Range:	DN50-DN400 (2" to 16")
Temperature Range:	-35°C to 120°C
Pressure Rating:	PN10 (2” to 6”), PN8 (8”), PN7 (10”), PN6 (12” to 14”), PN5 (16”)
Applications:	Wastewater Treatment, Pulp & Paper, Mining & Mineral Processing, Food & Beverage, & More
Body Materials:	Cast Iron Body, Stainless Steel Knife
End Connections:	ANSI 150 and AGRI Standard Square Flanges, & More

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Constructed from high-quality stainless steel, these gate valves offer exceptional resistance to corrosion and are well-suited for applications involving aggressive media. Their streamlined design with a sharp-edged gate ensures reliable shutoff, making them an ideal choice for processes where minimal leakage is critical. They find applications in wastewater treatment, chemical processing, food and beverage, and more, providing a robust and hygienic solution for fluid control while meeting stringent industry standards.

Size Range:	DN50-DN300 (2" to 12")
Temperature Range:	-35°C to 120°C
Pressure Rating:	PN10 (2” to 6”), PN8 (8”), PN7 (10”), PN6 (12”)
Applications:	Wastewater Treatment, Pulp & Paper, Mining & Mineral Processing, Food & Beverage, & More
Body Materials:	CF8M Stainless Steel Body & Knife, & More
End Connections:	Wafer to suit PN10, Flanged PN10

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Knife gate valves are specifically designed to handle tough, thick, and viscous fluids, slurries, and powders. They operate by using a sharp-edged blade (the "knife") that cuts through the media and seals against the valve seat to either stop or allow flow.

When the valve is in the open position, the gate (blade) is lifted completely out of the flow path, allowing an unobstructed passage. When it’s time to stop the flow, the actuator or handwheel drives the gate downward. The sharp edge slices through any material in the pipeline and presses down into a soft or metal seat, forming a tight seal. Because the gate moves vertically in a straight line, these valves are simple and highly effective for on/off control but are not ideal for throttling.

Knife gate valves are often used in industries like mining, wastewater, pulp and paper, and chemical processing, where heavy or abrasive media can clog or damage other types of valves.

Knife gate valves are essential in industries where thick, abrasive, or solid-laden media are common. Their ability to cut through tough materials makes them a reliable choice for challenging applications. Typical industries that use knife gate valves include:

Mining and Mineral Processing: Handling slurries, tailings, and abrasive mixtures.
Wastewater Treatment: Managing sludge, grit, and thick waste streams.
Pulp and Paper: Controlling pulp stock, recycled paper, and fibrous materials.
Chemical Processing: Managing viscous or corrosive fluids and powders.
Power Generation: Ash handling and slurry transportation systems.
Food and Beverage: Handling bulk solids, powders, and viscous food products.
Cement and Bulk Material Handling: Managing dry powders, aggregates, and dense materials.

What is a Knife Gate Valve?

A Knife Gate Valve is a type of valve designed to control the flow of fluids in systems by using a sharp-edged gate to cut through and control the flow.

Where are these valves commonly used?

Knife Gate Valves are often used in industries such as wastewater treatment, mining, pulp and paper, and power generation for applications involving thick, viscous, or abrasive media.

What makes them different from other types of valves?

Knife Gate Valves are distinct for their ability to cut through and isolate media effectively, making them suitable for applications with solid particles or slurries.

Are they bidirectional?

Yes, most Knife Gate Valves are bidirectional, meaning they can control the flow in both directions.

How do they operate?

They use a sharp-edged gate that moves perpendicular to the flow path to control or block the media.

Can Knife Gate Valves handle abrasive materials?

Yes, Knife Gate Valves are designed to handle abrasive and challenging media effectively, thanks to their robust construction.

What maintenance is required?

Regular maintenance includes inspecting the seals, gate, and actuator, and ensuring they are free from debris to maintain optimal performance.

Are there different types available?

Yes, Knife Gate Valves come in various types, including through-going, wafer, and lugged designs, each suitable for specific applications.

Can these valves be automated?

Yes, Knife Gate Valves can be automated with actuators for remote operation and control.

Are replacement parts and spares available for these valves?

Yes, Actuation Valve offers sustainable spares and replacement parts for ongoing maintenance schedules.

What are the advantages of using Knife Gate Valves?

Knife Gate Valves offer benefits such as excellent sealing, minimal pressure drop, and the ability to handle tough media, making them ideal for demanding applications.

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