Push-Through Knife Gate Valve
The Push-Through Knife Gate Valve (also called Slurry Knife Gate Valve or Through-Seat Knife Gate Valve) is specially designed for handling high-consistency slurries, abrasive media, and processes with high solid content. Unlike conventional knife gate valves, the push-through design features a bottom discharge opening that allows oversized particles, fibers, and solids to pass through without clogging. This ensures reliable shut-off and extended service life in the toughest operating conditions.
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Key Features
Open-Bottom Design – Prevents media buildup and clogging inside the valve body.
Dual Elastomer Sleeves – Provide a flexible, tight seal with zero leakage to atmosphere.
Self-Cleaning Gate Action – Wipes solids away when closing, minimizing maintenance.
Heavy-Duty Construction – Built for mining, pulp, power plant, and wastewater industries.
Bi-Directional Sealing – Capable of sealing from either side of the valve.
Low Maintenance – Sleeve seals can be replaced without removing the valve from the pipeline.
Applications
Mining & Mineral Processing – Tailings, concentrate, and abrasive slurry handling.
Pulp & Paper Industry – Thick pulp stock, fiber-laden media, and recycled paper slurries.
Power Generation – Fly ash, bottom ash slurry, and FGD systems.
Wastewater Treatment – Thickened sludge, grit removal, and raw sewage with high solids.
Bulk Material Handling – Granules, powders, and dry bulk discharge in hoppers.
Technical Specifications
Size Range: 2″ (DN50) to 48″ (DN1200)
Pressure Rating: PN 10 / PN 16 (higher pressure options available)
Body Materials: Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel, Duplex
Sleeve Materials: EPDM, NBR, Natural Rubber, or custom elastomers
Actuation Options: Manual, Bevel Gear, Pneumatic, Hydraulic, or Electric
Advantages at a Glance
✔ 100% tight shut-off, even in highly abrasive conditions
✔ Open discharge design eliminates clogging problems
✔ Reduced downtime with quick sleeve replacement
✔ Long service life in harsh industrial applications
✔ Lower total cost of ownership compared to standard designs in slurry service
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Push-Through Knife Gate Valve – Pricing FAQ
Prices vary depending on size, pressure rating, body/seat material, and actuation type. Push-through valves are designed to slice through abrasive or slurry media, so they are generally more expensive than standard knife gate valves, especially in larger sizes or high-pressure ratings.
The push-through design allows the gate to cut through thick or abrasive media while minimizing wear on the valve body and seat. Precision machining, reinforced construction, and specialized seats increase the manufacturing cost compared to simpler designs.
Key pricing factors include:
Valve size: Larger diameters require more material and engineering.
Pressure class: Higher pressure ratings need stronger, heavier bodies.
Body material: Stainless steel and duplex alloys cost more than carbon steel or cast iron.
Seat design: Options include resilient, metal, PTFE, or sleeve seals.
Actuation method: Manual < gear-operated < pneumatic/hydraulic < electric.
Yes. For mining, wastewater, pulp & paper, or other abrasive media applications, push-through valves offer longer service life, less maintenance, and reduced downtime, making them cost-effective over time.
Yes. Large projects or repeat orders can qualify for competitive discounts and customized packages.
Share your requirements—including size, pressure class, material, seat type, and actuator preference—and our sales team will provide a tailored quotation within 24 hours.
