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Knife Gate Valves

  • SS316 Knife Gate Valve
    SS316 Knife Gate Valve
    Brief:
    Size:6″，8”
    Rating:150LB
    Materials:
    ASTM A351 CF8M body
    ASTM A182 F316+HCR knife gate
    CS stem and yoke
    PTFE seat
    Operator: handwheel
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  • Lug-Type Pneumatic Knife Gate Valve
    Lug-Type Pneumatic Knife Gate Valve
    Size & Pressure ： Nominal Size: 14" (DN 350)
    Pressure Rating: JIS 5K (7 kgf/cm² @ 120°C)
    Body Material ASTM A216 WCB Carbon Steel
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  • Pneumatic Actuated Wafer-Type Knife Gate Valve
    Pneumatic Actuated Wafer-Type Knife Gate Valve
    Size & Pressure • Nominal Size: 14" (DN 350)
    Pressure Rating: JIS 5K (7 kgf/cm² @ 120°C)
    Body Material：ASTM A216 WCB Carbon Steel
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  • 316 Stainless Steel Full Lug Knife Gate Valve
    316 Stainless Steel Full Lug Knife Gate Valve
    • Size: 8"
    • Pressure Rating: 150 LB
    • Body Material: CF8M (316 Stainless Steel Cast Equivalent)
    • Key Component Materials:
    o Gate Disc: 316 SS + HCR (Hard Chrome Plated or Hardfaced Surface)
    o Stem: 316 Stainless Steel
    o Seat: PTFE (Polytetrafluoroethylene)
    • Operation: Handwheel Operated
    • End Connection: Full Lugged
    • Flow Direction: Unidirectional
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  • 316L Fully Lugged Knife Gate Valve
    316L Fully Lugged Knife Gate Valve
    Valve Type Knife Gate Valve, Lugged Body, Rising Stem / Non-Rising Stem (Specify)
    Size Range DN50 – DN600 (2″ to 24″)
    Pressure Rating Class 150 (PN10/PN16 compatible)
    End Connection Lugged Type (Tapped bolt holes per ASME B16.5 Class 150 drilling)
    Design Standard MSS SP-81 / API 609 (Category A)
    Face to Face Standard MSS SP-81 (Short pattern) / Manufacturer’s standard
    Test Standard API 598 / MSS SP-81
    Service Slurries, Pulp & Paper, Wastewater, Chemical, Mining, Corrosive Fluids
    Temperature Range -20°C to +180°C (-4°F to +356°F) (PTFE seat limitation)
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  • 12″-150LB-Wafer Knife Gate Valve
    12″-150LB-Wafer Knife Gate Valve
    Nominal Pipe Size (NPS) 12″ (DN 300)
    Pressure Class Class 150 (150 LB)
    Maximum Working Pressure 150 psi (10.3 bar)
    Face to Face Dimension L 8″ (approx. 203 mm)*
    Flange Standard ASME B16.5 Class 150
    Flange Facing RF (Raised Face) / FF (Flat Face)
    Connection Type Wafer type
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A knife gate valve is a specialized type of gate valve designed to handle thick fluids, slurries, and materials with suspended solids. It features a sharp-edged blade or "knife" that can cut through dense media to open or close the flow path. When the valve is operated, the gate moves vertically down into the flow path to stop flow, or up to allow full passage. This valve is particularly effective in industries like wastewater treatment, pulp and paper, mining, and chemical processing, where traditional valves may clog or struggle with semi-solid materials. Unlike standard gate valves, knife gate valves provide a tight seal even in abrasive or sticky applications. They are generally used in low-pressure, low-velocity systems and are available in manual, pneumatic, or electric actuation options. Their compact design and minimal flow resistance make them easy to maintain and ideal for space-constrained installations. The knife gate valve's ability to cleanly shear through thick media without leakage or blockages makes it a critical component in many heavy-duty and industrial systems.

What Are The Key Benefits Of Knife Gate Valves?

Knife gate valves offer unique benefits tailored for demanding industrial environments. Their standout advantage is the ability to cut through thick, viscous, or solid-laden fluids that would otherwise clog standard valves. The thin, sharpened gate slices through slurry, pulp, or granules, making them ideal for wastewater, mining, food processing, and similar applications. They are also cost-effective for large pipe diameters, where alternative valve types can be expensive. Knife gate valves provide excellent shut-off capability with minimal pressure drop when fully open, which enhances efficiency and prevents energy loss. Their simple design translates into fewer components and lower maintenance needs, especially in systems with abrasive or corrosive materials. Furthermore, knife gate valves are available in a wide range of body and seat materials, allowing customization based on media type and system conditions. Their ease of installation and compatibility with manual, pneumatic, or electric actuators make them flexible for both new builds and retrofits. Overall, knife gate valves combine performance, simplicity, and durability for challenging fluid handling tasks.

Knife Gate Valves FAQ

  • 1.What does a knife gate valve do?

    It cuts through thick fluids or slurries to control flow.

  • 2.Can knife gate valves handle solids?

    Yes, they are ideal for media with high solid content.

  • 3.Are knife gate valves good for high pressure?

    No, they are best for low-pressure applications.

  • 4.Can knife gate valves be automated?

    Yes, they support manual, pneumatic, or electric actuators.

  • 5.What industries use knife gate valves?

    Used in mining, wastewater, paper, and food processing.

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