WCB Flanged Soft Seated Knife Gate Valve - Manual (Non-Rising Stem)

2in~48in; PN0~PN20 (Class125~150)

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Product Advantages

icon Space-Saving Non-Rising Stem | Direct-from-Source Manufacturer | Precision Beveled Gate & Soft Seat

Standards and Certifications

Design and Manufacture: MSS SP-81, ASME B16.34, JB/T 8691

Pressure & Temperature Rating: ASME B16.34

Side Flange Standards: ASME B16.5 (Class 150), EN 1092-1 (PN10/PN16), JIS B2220 (10K), AS 2129, GOST 33259

Top Flange (Actuator Mounting): ISO 5211; GB 90°

Face-to-Face Dimension: MSS SP-81, EN 558-1, GB/T 12221

Testing Standards: API 598, MSS SP-81, ISO 5208, EN 12266-1

Certifications: ISO 9001; CE; BV; API 609; API 598; EAC; SIL3；

Technical description

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Q&A

Specification of the Valve

Valve Type	Slurry Knife Gate Valve (Non-Rising Stem)
Connection	Flanged (RF / FF), Wafer, Lug
Actuation	Manual Handwheel / Bevel Gear / Chainwheel Operator
Size Range	DN50 ~ DN1200 (Featured: DN400)
Pressure Rating	PN6/ PN10 / PN16 / Class 125/ Class 150 / JIS 10K
Target Medium	Slurry, Mining Tailings, Pulp, Wastewater, Ash
Operating Temp.	-20℃ ~ +200℃ (Depends on seat/seal material)

Material Configuration

Body	Stainless Steel: CF8 (SS304), CF8M (SS316) - High Anti-Corrosion Carbon Steel: WCB (Available for standard applications)
Gate / Blade	SS304, SS316, SS316L, Duplex 2205 (Beveled edge for cutting solids)
Stem	Stainless Steel: SS410, SS304, SS316 (Non-Rising Design)
Seat (Soft)	EPDM, NBR, Viton (FKM), PTFE (Bi-directional Zero Leakage)
Operation Unit	Cast Iron / Ductile Iron (Gearbox / Chainwheel available)

Engineered for Severe Service: Optimal Applications

The combination of a non-rising stem, precision-machined beveled knife gate, and high-density cast stainless steel body makes this valve the ultimate solution for handling thick, abrasive, and corrosive media across heavy industries.

Mining & Mineral Processing

Why it fits: Tailings and mineral slurries are highly abrasive. The beveled stainless steel blade effortlessly cuts through solid particulates. The non-rising stem design is crucial for underground mines where vertical installation space is strictly limited.

Pulp & Paper Industry

Why it fits: Paper stock contains dense fibers that clog standard valves. The guillotine action of the knife gate easily shears through thick pulp. The flanged connection ensures a robust seal under high pipeline vibration typical in paper mills.

Chemical & Petrochemical

Why it fits: When handling corrosive sludge or crystalized chemical media, our optional high-density CF8/CF8M stainless steel body guarantees zero porosity. This prevents hazardous chemical leakage, ensuring plant safety and compliance.

Wastewater Treatment

Why it fits: Raw sewage and sludge demand a valve that won't jam. The soft seated design (EPDM/NBR) conforms around small trapped debris to provide bidirectional zero-leakage, reducing maintenance in municipal pump stations.

Power Generation (Ash Handling)

Why it fits: Moving fly ash or bottom ash in coal-fired power plants requires extreme durability. A DN400 valve can be difficult to operate; equipping it with our Chainwheel Gear Operator allows workers to safely actuate overhead high-pressure ash lines from the ground.

Bulk Materials & Silos

Why it fits: Installed at the bottom of silos or hoppers discharging dry cement, grain, or powders. The full-port design allows unrestricted flow, and the non-rising stem prevents dust buildup on the operating threads, extending the valve's lifespan.

QUALITY & COMPLIANCE CERTIFIED

Slurry Knife Gate Valve - Flanged Non-Rising Stem

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Sample MTC (EN 10204 3.1) - Material Traceability

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Slurry Knife Gate Valve: Technical FAQs

What makes your slurry knife gate valve ideal for thick and abrasive media?

Our valve is specifically engineered to handle the toughest industrial fluids without clogging:

Guillotine Cutting Edge: The precision-beveled gate easily shears through thick solid particulates, fibers, and heavy sludge.
Non-Rising Stem Design: Protects the operating threads from corrosive fumes and abrasive dust, while saving critical installation space in underground mines or compact skids.
Zero Leakage Soft Seat: High-quality elastomers (EPDM/Viton) form a tight seal around trapped debris, ensuring bi-directional tight shut-off.

Why should I buy slurry knife gate valves directly from JRVAL?

Unlike mere trading companies, JRVAL is an ISO9001 & CE certified source factory with 20 years of proven market reliability:

Complete Supply Chain Control: We integrate casting, precision machining, and assembly in-house. This guarantees metallurgical purity (no porosity in castings) for high-pressure stability.
Verified by Facts: With two decades of hands-on experience, our product designs are highly rationalized for extreme environments, minimizing maintenance downtime.
Cost-Efficiency: By eliminating middlemen, we provide premium, fully tested valves at highly competitive factory-direct prices.

What specific industries and fluids are these valves best suited for?

The robust construction of our slurry knife gate valve makes it the go-to solution for heavy industries:

Mining & Minerals: Perfectly handles highly abrasive mineral tailings and coal slurries.
Pulp & Paper: Cuts through dense paper stock and fibrous pulp without jamming.
Power & Wastewater: Ideal for fly ash handling in power plants and raw sewage isolation in municipal water treatment facilities.

Can this valve be equipped with a chainwheel, and what standards do you support?

Yes, as a true source manufacturer, we offer deep customization to fit your pipeline design:

Chain Operated Gearbox: For large sizes (like DN400) installed in elevated areas, we integrate heavy-duty chainwheels, allowing safe and effortless operation from the ground floor.
Flanged Connections: We manufacture to global standards, including ANSI B16.5 Class 150, EN 1092-1 PN10/PN16, and JIS 10K.
Body Materials: Available in both WCB for standard applications and high-density Stainless Steel (CF8/CF8M) for highly corrosive environments.