Lug Knife Gate Valve
Lug Knife Gate Valves are designed with threaded lugs on the valve body, allowing the valve to be bolted directly between flanges on a pipeline. Unlike wafer-type valves, lug-style valves can be installed in end-of-line service and enable one side of the pipeline to be removed without disturbing the opposite side. This makes them highly versatile for isolation, maintenance, and repair operations.
Thanks to their strong mechanical connection and reliable shut-off performance, lug knife gate valves are widely used in mining, wastewater, pulp & paper, chemical, and power generation industries.
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
End-of-Line Service – Can be safely installed at the end of a pipeline.
Easy Maintenance – One side of the piping system can be removed without shutting down the other.
Threaded Lug Design – Provides a secure and stable flange connection.
Reliable Shut-Off – Capable of cutting through slurry, pulp, and viscous media.
Flexible Actuation Options – Available with manual, pneumatic, electric, or hydraulic operation.
Stronger Support – More robust compared to wafer type, suitable for medium-pressure applications.
Materials
Body: Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel (304 / 316), Duplex Steel
Gate: Stainless Steel (304, 316, 410) or Hard-Coated for abrasion resistance
Seat Options: Resilient (EPDM, NBR, PTFE), Metal-to-Metal, or Elastomer Sleeve
Technical Specifications
Size Range: DN 50 (2”) to DN 1200 (48”)
Pressure Ratings: ASME Class 150 / Class 300, PN 10 / PN 16 / PN 25
Temperature Range: -20°C to +425°C (depending on material)
Design Standards: MSS-SP-81, DIN, JIS, AWWA, API (on request)
Connection: Lugged body with full flange compatibility
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: Slurry and tailings transport
Pulp & Paper: Stock, fiber, and recycled pulp systems
Wastewater Treatment: Raw sewage, sludge, and high-solid fluids
Power Plants: Ash handling and flue gas desulfurization (FGD) systems
Chemical Processing: Corrosive and abrasive fluid isolation
Industrial Pipelines: End-of-line isolation and system maintenance
Why Choose Our Lug Knife Gate Valves?
Designed for safe end-of-line service
Strong and reliable mechanical connection
Available in multiple materials and sealing types
Wide selection of actuators and accessories
Competitive pricing with international quality compliance
* We are not just providing simple quotes but experts in selection, calculation, and drawing.
Lug Knife Gate Valve – Pricing FAQ
The price depends on the valve size, body material, seat design, and actuator type. A small cast iron manual valve is relatively low cost, while a large stainless steel pneumatic-actuated valve will be more expensive. Contact us with your specifications for an accurate quotation.
Yes, typically lug-style valves are slightly more expensive because of the threaded lug design, which provides stronger connections and allows end-of-line service. However, they offer greater versatility and maintenance benefits, which can reduce long-term operating costs.
Valve size (larger diameters increase cost)
Body material (stainless steel and duplex are costlier than cast iron or carbon steel)
Seat material (resilient, PTFE, or metal seat)
Actuation method (manual, pneumatic, electric, or hydraulic)
Yes. For project-based or large-volume orders, we provide competitive pricing and bulk order discounts.
Simply send us the valve size, pressure class, body material, seat type, and actuation method you require. Our sales team will prepare a tailored quotation, usually within 24 hours.
