Pneumatic Knife Gate Valve
Production Overview
The Pneumatic Knife Gate Valve, engineered and manufactured by Vcore Valves, is specifically designed for demanding applications that involve thick fluids, slurries, and dry bulk materials. Its streamlined gate design effortlessly cuts through media, ensuring reliable shut-off performance in even the most challenging environments. Actuated by high-efficiency pneumatic cylinders, this valve offers fast, automated operation and minimal maintenance requirements.
Key Features
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Efficient Cutting: Knife-shaped gate blade slices through high-viscosity media, solids, and slurry with ease.
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Automated Control: Pneumatic cylinder provides fast, safe, and precise valve actuation.
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Full Port Design: Minimal flow resistance with reduced pressure drop.
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Self-Cleaning: Gate scrapes accumulated solids upon opening/closing, preventing jamming.
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Compact Structure: Space-saving design for convenient piping installation.
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Low Maintenance: Simple design with minimal moving parts reduces wear and maintenance cost.
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Versatile Installation: Can be mounted vertically or horizontally to suit site conditions.
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Custom Options: Available with soft seal, metal seat, or PTFE-lined designs upon request.
Technical Specifications
| Item | Description |
|---|---|
| Valve Type | Pneumatic Knife Gate Valve |
| Actuation | Double-acting or single-acting pneumatic cylinder |
| Valve Body | Cast Iron, Carbon Steel, Stainless Steel 304/316 |
| Gate Material | Stainless Steel 304, 316, or Hard Chrome Plated Steel |
| Seat Material | EPDM, PTFE, Metal, NBR, Viton |
| Seal Type | Resilient seal or metal-to-metal seating |
| Pressure Rating | PN10 / 150 PSI / 1.0 MPa (higher on request) |
| Size Range | DN50–DN1200 (2″–48″) |
| Temperature Range | -20°C to +200°C (depending on seat material) |
| Connection Type | Wafer, Lug, Flanged |
| Media Suitability | Slurry, pulp, powder, wastewater, granular materials |
| Control Options | Solenoid valve, limit switch, positioner, manual override |
Main Dimensions & Weight
| Size (DN) | L (Face to Face) | H (Closed) | W (Actuator Width) | Weight (kg) |
|---|---|---|---|---|
| 50 | 50 mm | 280 mm | 180 mm | 9 |
| 100 | 60 mm | 420 mm | 210 mm | 17 |
| 150 | 70 mm | 580 mm | 240 mm | 26 |
| 200 | 80 mm | 720 mm | 280 mm | 38 |
| 300 | 100 mm | 960 mm | 330 mm | 66 |
| 400 | 120 mm | 1220 mm | 390 mm | 102 |
| 500 | 140 mm | 1450 mm | 460 mm | 155 |
| 600 | 150 mm | 1700 mm | 520 mm | 210 |
Function
The valve operates by using compressed air to drive the piston inside the pneumatic actuator. As the actuator moves, it drives the knife gate to open or close. The sharpened gate edge smoothly passes through thick or fibrous media, ensuring complete shut-off when closed. Thanks to its low friction sealing and minimal flow obstruction, it is ideal for processes requiring reliable isolation with sticky, abrasive, or particulate-rich fluids.
Application
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Pulp & Paper Industry: Handles fiber-rich pulp without clogging.
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Wastewater Treatment: Reliable shut-off for sludge and raw sewage flow control.
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Mining & Mineral Processing: Ideal for slurry, tailings, and abrasive ore handling.
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Power Plants: Ash handling systems and bottom discharge control.
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Chemical Industry: Processes with high-viscosity liquids and powders.
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Food & Beverage: Suitable for dry powder handling in food processing lines.
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Cement Plants: Regulates granular material flow in silos and conveyors.