Steel Valve
Iron Valve
Fittings and Accessaries
Heavy Duty Slurry Knife Gate Valve
Heavy Duty Slurry Knife Gate Valve is a rugged, high-performance industrial valve specifically engineered to handle the harshest slurry applications—including high-concentration, high-abrasion, and high-density slurries that cause rapid wear and failure in standard knife gate valves. Built with an ultra-robust heavy-duty structure, reinforced body, and wear-resistant components, this valve delivers reliable on/off flow control while withstanding extreme impact, abrasion, and corrosion from solid-laden slurry.
Features
-Heavy-Duty Reinforced Structure: Thick-walled valve body (10-20% thicker than standard knife gate valves) with integral rib reinforcement, crafted from high-strength materials to withstand high pressure, impact, and mechanical stress from dense slurry. The heavy-duty design eliminates deformation and damage even in continuous, high-load operation, ensuring structural integrity in harsh industrial settings.
-Ultra-Wear-Resistant Knife Gate: Thickened, one-piece knife gate made of high-chromium alloy steel (12% Cr), wear-resistant stainless steel (316L), or ceramic-coated steel—with a hardened edge (HRC 60+) and polished surface. This design resists abrasion, erosion, and impact from solid particles in high-concentration slurry, extending gate service life by 3-5 times compared to standard valves.
-Specialized Slurry Sealing System: Equipped with replaceable, wear-resistant seats (ceramic, polyurethane, or EPDM) designed for slurry service—featuring a tight, bi-directional seal that prevents slurry leakage and minimizes seat wear. The seat’s flexible design accommodates minor gate misalignment and compensates for wear, ensuring long-term sealing performance.
-Anti-Clogging & Self-Cleaning Design: Cavity-free, full-port flow path with no dead spaces or grooves, preventing slurry deposition and clogging. The knife gate’s sharp edge and lifting motion scrape off adhered slurry during operation, achieving self-cleaning performance and ensuring smooth opening/closing even with high-viscosity, high-solid slurry.
-Adjustable secondary seal.
-No gate or stem packing is required,eliminating packing leakage and maintenance.
-All metal part except stainless steel gate are isolated from the medium, better anti-corrosive/abrasive capability
Technical Specifications
-Design Standard:MSS SP-81
-End Connection:EN1092 /ASME B16.5/AS4087/JIS
-Test Standard: MSS SP-81
-Working Pressure:2bar -10bar
-Size:DN50-DN800
-Flange Connection: ASME CLASS 150~300（PN6~PN25）
-Body Material: Ductile Iron,Carbon steel, Stainless steel
-Seal Material:NR(Natural Rubber Hard),FKM,NBR,Metal,Cr
-Operation:Manual hand wheel,Gearbox,Electric,Pneumatic Cylinder,Hydraulic Cylinder,Bare shaft with ISO top flange, etc.
Application
-Temperature Range:
- Soft Sealing (EPDM/NBR): -10℃ ~ 120℃
- Metal/CeramicHard Sealing: -29℃ ~ 400℃
-Primary Media: High-concentration slurry (mining tailing, coal slurry, ore slurry, iron ore concentrate), abrasive slurry(sand slurry, gravel slurry), viscous slurry, sludge, fly ash slurry, and other solid-laden media with high abrasion and impact potential.
-Applicable Scenarios: Mining industry (underground mines, open-pit mines, tailing disposal), metallurgical plants (iron and steel slurry transfer), coal-fired power plants (fly ash and desulfurization slurry), chemical plants (corrosive slurry handling), cement plants (cement slurry), and bulk material processing facilities—all heavy-duty industrial scenarios requiring reliable, wear-resistant slurry flow control.
