Knife Edge Gate Valve
Knife Edge Gate Valve Supplier in India — Aarya Sales
Knife edge gate valves (also called knife gate valves) feature a thin, sharp-edged stainless steel gate that cuts through slurry, pulp, fibrous media, and viscous fluids that would clog or damage conventional gate valves. Aarya Sales supplies knife edge gate valves in sizes 50 NB to 1200 NB, pressure ratings up to 10 bar (wafer/lug) and 16 bar (flanged).
Gate materials: SS 304/316/410/HC; body: Cast Iron, Ductile Iron, SS 316, Carbon Steel. Seat/packing: NBR, EPDM, PTFE. Designs: wafer (between-flanges), lug (dead-end), and flanged. Standards: MSS SP-81, DIN 3230, AWWA C520. Actuated with pneumatic, electric, or hydraulic actuators. Used in mining, paper & pulp, sewage, effluent treatment, food processing, and cement industries.
Frequently Asked Questions
A knife edge gate valve has a thin flat gate with a sharpened or bevelled leading edge that slices through slurry, pulp, fibres, and viscous media. Unlike wedge gate valves which can be clogged by solids, knife gate valves are specifically designed for on/off service in dirty, slurry-containing, or fibrous fluids.
Mining and mineral processing (tailings, slurry), paper & pulp mills (pulp stock, black liquor, green liquor), sewage and wastewater treatment (sludge, screenings), cement slurry, sugar processing, food and beverage (viscous products), and any application involving non-Newtonian or particle-laden fluids.
Aarya Sales supplies knife gate valves from 50 NB (2") to 1200 NB (48") in wafer, lug, and flanged-end designs. Pressure ratings: PN 6/PN 10/PN 16 for standard service; higher ratings available in heavy-duty flanged designs. Bi-directional sealing versions available for demanding applications.
Gate: SS 304, SS 316, SS 410, HC (hard-coated), Duplex 2205, and AR-400 wear-resistant steel for abrasive slurry. Body: Cast Iron (IS 210), Ductile Iron, Carbon Steel, SS 316, and exotic alloys. Seat/liner: NBR, EPDM, Natural Rubber, PTFE, and ceramic-lined for high-abrasion service.
Yes. Pneumatic (cylinder/scotch-yoke), electric, and hydraulic actuators with fail-safe (spring-return) options are available for all knife gate valve sizes. Solenoid valves, limit switches, and positioners for integration with PLC/DCS control systems are also supplied.
Wafer knife gate valves are clamped between pipe flanges with bolts passing through the valve body — compact and lightweight, not suitable for dead-end service. Lug-type knife gate valves have tapped bolt holes on both faces allowing either side of the pipe to be disconnected independently — suitable for end-of-line isolation.