Flanged Knife Gate Valve
Flanged Knife Gate Valves are designed with full flanged ends, providing a strong, secure, and leak-proof connection to the pipeline. Compared with wafer or lug types, flanged valves are more robust and better suited for large-diameter and high-pressure applications. The full flange body design ensures stability, minimizes vibration, and allows safe operation in heavy-duty industrial systems.
Flanged knife gate valves are widely applied in mining, wastewater, pulp & paper, power generation, and petrochemical industries, where reliable shut-off and durability are critical.
Let’s Help You Specify the Right Knife Gate Valve
Be careful when choosing a new valve supplier, the disappointment of poor quality can last much longer than the joy of a low price!
Key Advantages
Robust Flanged Connection – Provides high mechanical strength and secure sealing for demanding applications.
High Pressure & Large Bore Capability – Ideal for systems with larger diameters and higher pressure ratings.
Versatile Sealing Options – Available with resilient, metal, or sleeve seats to handle different fluids and operating conditions.
Reliable Shut-Off – Capable of cutting through slurry, viscous media, or fluids with solid particles.
Customizable Design – Offered in a wide range of materials, pressure ratings, and actuation methods.
Construction Materials
Body: Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel (304, 316), Duplex Steel
Gate (Blade): Stainless Steel (304, 316, 410), Hardened Alloy Steel, or Ceramic Coated for abrasive resistance
Seat Options:
Resilient Seats (EPDM, NBR, PTFE) for bubble-tight shutoff in liquids
Metal Seats for high-temperature or abrasive media
Full Sleeve Design for heavy slurry and mining applications
Technical Specifications
Size Range: DN 50 (2”) up to DN 2000 (80”)
Pressure Ratings: ASME Class 150 / Class 300, PN 10 / PN 16 / PN 25
Temperature Range: -20°C to +425°C (depending on seat material)
Design Standards: MSS-SP-81, API (on request), DIN, JIS, AWWA
End Connection: Full flanged body drilled to international standards
Actuation Methods
Manual: Handwheel, Bevel Gear, or Chainwheel for overhead valves
Pneumatic: Double-acting or spring-return cylinders for fast cycle automation
Electric: Precise, remote operation with optional control systems
Hydraulic: High-thrust solutions for large-diameter and high-pressure services
Typical Applications
Mining & Minerals: High-density slurry and abrasive tailings pipelines
Pulp & Paper: Stock, recycled fiber, and viscous pulp systems
Wastewater Treatment: Sludge, raw sewage, and high-solid fluids
Power Plants: Flue gas desulfurization (FGD), ash handling, cooling water
Petrochemical & Chemical Industry: Corrosive, abrasive, and high-pressure liquid isolation
Why Choose Our Wafer Knife Gate Valves?
Engineered for high-pressure and heavy-duty systems
Superior mechanical strength compared with wafer and lug types
Wide range of sizes, materials, and sealing options
Designed to meet international flange standards
Competitive pricing with reliable long-term performance
* We are not just providing simple quotes but experts in selection, calculation, and drawing.
Flanged Knife Gate Valve – Pricing FAQ
The price varies according to valve size, pressure rating, body material, seat design, and actuation method. Smaller cast iron manual valves are more economical, while large stainless steel or duplex steel valves with pneumatic/electric actuators are more costly. Contact us for an accurate quotation based on your project requirements.
Yes. Flanged valves generally cost more because of their full flange body design, which provides superior strength, higher pressure handling, and better sealing reliability. They are the preferred choice for heavy-duty and large-diameter applications.
Valve size (cost increases with larger diameters)
Pressure rating (higher class valves cost more)
Body material (stainless steel > carbon steel > cast iron)
Seat design (resilient, PTFE, or metal seat)
Actuation method (manual < pneumatic < electric < hydraulic)
Yes. We provide competitive project pricing and bulk order discounts for OEMs, distributors, and engineering projects.
Send us your specifications (size, pressure class, body/seat material, and actuator type), and our sales team will prepare a tailored quotation—usually within 24 hours.
