Slurry Knife Gate Valve

Knife gate slurry valves are heavy-duty, bi-directional isolation valves designed for cutting through thick, abrasive, and corrosive slurry media. They feature a sharp-edged gate, durable polymer sleeve seats (often in a “push-through” design), and a packing-less construction, enabling tight shutoff performance while preventing solids from clogging or damaging the valve mechanism.

• Zero leakage & bi-directional sealing: Engineered for high-pressure, abrasive applications such as mining tailings, pulp, and paper industries, providing reliable bubble-tight shutoff in both flow directions.
• No cavity design: The seat configuration eliminates internal cavities where solids could accumulate, ensuring stable operation. The sleeves seal tightly against each other when the valve is fully open or closed.
• Sleeve-based sealing: Elastomer-lined sleeves serve as the primary wear components and are designed for easy replacement using a slip-in/slip-out system, without removing the valve from the pipeline.
• Heavy-duty construction: Typically constructed with robust cast iron or ductile iron bodies (often in one-piece or split-body designs) and stainless steel gates, ensuring high strength and abrasion resistance under severe service conditions.
• Push-through action: During closing, the gate pushes the slurry through the sleeves, minimizing buildup and preventing clogging.
• Actuation options: Available with manual, pneumatic, or hydraulic actuators to ensure reliable operation in demanding environments.

• Mining & mineral processing: cyclone feed lines, flotation circuits, tailings discharge, slurry transport
• Power generation: ash handling and sludge disposal
• Wastewater treatment: thick sludge and corrosive media handling
• Paper & pulp industry: fibrous and abrasive stock control

• Slurry knife gate valves are widely used in the following industries and services:
• Mining & Mineral Processing: Tailings systems, thickener underflow, cyclone feed lines, and sand slurry transport.
• Wastewater Treatment: Sewage handling, grit removal systems, sludge control, and wet solids processing.
• Pulp & Paper Industry: Wood pulp, recycled fiber slurry, and paper stock isolation and control.
• Chemical & Petrochemical Industry: Corrosive slurries, polymer solutions, catalysts, and process by-products.
• Power Plants: Fly ash handling, bottom ash slurry systems, and cooling water or ash transport applications.

• Unidirectional Slurry Knife Gate Valve: Designed for systems with flow in a single direction, providing reliable and tight shut-off performance.
• Bidirectional Slurry Knife Gate Valve: Provides sealing in both flow directions, making it suitable for pipelines where reverse flow conditions may occur.
• Pneumatic / Electric Actuated Slurry Knife Gate Valve: Automation-ready valve designed for remote control operation and fast actuation response.
• High-Pressure Slurry Knife Gate Valve: Features a reinforced body and gate structure, suitable for demanding mining and heavy industrial applications involving high pressure and severe abrasion.

Solutions for Mining Industry: Our durable valves, actuators, and control systems are designed for demanding mining and mineral processing applications. They are engineered to handle abrasive and corrosive media encountered in the extraction and refining of materials such as aluminum, copper, gold, and other minerals, ensuring reliable performance under harsh operating conditions.