Industrial knife gate valves are heavy-duty valves designed to handle thick, abrasive, and viscous media such as slurry, pulp, wastewater, ash, and bulk solids.
Unlike conventional gate valves, these valves use a sharp-edged blade (knife) to cut through solid particles and fibers, ensuring a tight shut-off even in the toughest process conditions.
They are widely used in industries such as mining, power generation, wastewater treatment, pulp & paper, and chemical processing, where conventional valves often fail due to clogging or corrosion.
🧩 Working Principle
An industrial knife gate valve operates by moving a flat, sharpened gate vertically through the flow path.
When open, the gate is fully raised, allowing unrestricted flow.
When closed, the knife edge cuts through solids and seals tightly against soft or metal seats.
This simple linear motion makes it ideal for on-off applications in low-pressure, high-solid content systems.
🔩 Key Features
| Feature | Description |
|---|---|
| Full-Bore, Non-Clog Design | Ensures unrestricted flow of slurry, pulp, and solids. |
| Knife-Edge Gate | Cuts through fibrous and abrasive media, preventing jamming. |
| Corrosion-Resistant Materials | Stainless steel gate and coated body extend valve life. |
| Replaceable Seats | Soft-seated or metal-seated options for different industries. |
| Actuation Flexibility | Available with manual, pneumatic, or electric actuation. |
| Bi-Directional Sealing | Leak-tight shut-off from both directions. |
🧱 Common Applications
Industrial knife gate valves are used across a wide range of heavy-duty systems, including:
🏭 Mining & Mineral Processing: Slurry, tailings, and ore concentrate lines.
⚡ Power Plants: Ash handling, fly ash transport, and cooling water systems.
🌊 Wastewater Treatment: Sludge, scum, and chemical effluent control.
📦 Pulp & Paper Industry: Pulp stock, recycled fiber, and process water control.
🧪 Chemical & Petrochemical: Abrasive or corrosive fluid isolation.
🌾 Food & Beverage Processing: Handling viscous liquids and solids-laden fluids.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Size Range | DN50 – DN1200 (2″ – 48″) |
| Pressure Rating | PN10 / PN16 / Class 150 |
| Body Material | Ductile Iron, Cast Iron, Carbon Steel, Stainless Steel |
| Gate Material | AISI 304 / AISI 316 Stainless Steel |
| Seat Material | EPDM / NBR / PTFE / Metal |
| Stem Material | Stainless Steel |
| End Connection | Wafer, Lug, or Flanged |
| Operation | Handwheel, Gearbox, Pneumatic, or Electric Actuator |
| Temperature Range | -20°C to +200°C (depending on materials) |
| Coating | Fusion-Bonded Epoxy or Customized Paint |
| Standards | MSS SP-81, EN 593, AWWA C520 |
🧰 Advantages of Industrial Knife Gate Valves
✅ Non-clogging flow path ideal for high-solid content media
✅ Rugged, corrosion-resistant construction ensures long service life
✅ Low-pressure drop and smooth operation
✅ Easy maintenance with replaceable seals and seats
✅ Versatile design suitable for automation or manual control
🔧 Available Types
Wafer Knife Gate Valve – Compact, lightweight, and ideal for limited spaces.
Lug Type Knife Gate Valve – Allows installation between flanges or as end-of-line service.
Flanged Knife Gate Valve – Heavy-duty design for high-integrity sealing.
Pneumatic Knife Gate Valve – Automated for remote and frequent operation.
High-Pressure Knife Gate Valve – Reinforced design for demanding slurry or mining systems.
🌍 Why Choose TOT Valve Solutions
TOT Valve Solutions specializes in manufacturing and supplying industrial-grade knife gate valves built to perform under the harshest operating conditions.
With advanced machining, precision sealing technology, and international certifications, our valves ensure leak-tight performance, durability, and low maintenance cost.
We provide OEM/ODM services, custom materials, and global delivery for various industries worldwide.
📞 Contact Us
Looking for reliable industrial knife gate valves for your next project?
TOT Valve Solutions offers customized designs, quick lead times, and expert technical support.
👉 Get in touch today to request a datasheet, quote, or consultation with our engineering team.
