Mining Application
Thickener Underflow Isolation
Manage abrasive, high solids content slurries while separating tailings from reclaimed water.
Maximize Water Reclamation With Reliable Underflow Isolation
Thickeners are designed to separate processed solids for recirculation and reprocessing, or for distribution to tailings. In the thickener unit, valuable water is extracted from the slurry to reuse in other parts of the mining operation. The remaining solids material becomes concentrated for more efficient transfer to the tailings storage facility (TSF).
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Recommended Products
The following products are capable of providing zero leakage shutoff through high solids content slurry. These valves are engineered to excel in abrasive media for long lasting operation.
Emerson’s Clarkson KS1 is a TRUE bi-directional, zero – leakage ASME Class 150 knife gate valve, specifically designed to handle the challenges of severe service applications. Engineered to prolong valve longevity and maintenance intervals, the KS1 aims to offer a lower total cost of ownership.
- TRUE bi-directional, zero leakage performance for severe services
- Patented gate edge seal system eliminates leakage through top of valve
- Heavy cross-section, precision-molded elastomer seat increases sealing surface area to maintain zero-leakage performance for more cycles
Size Range
DN 50 - 750 (NPS 2 - 30)
Temperature Rating
205°C (400°F)
Pressure Rating
ASME Class 150
The Clarkson KGA+ heavy duty slurry valve offers improved seals, full flange body options, and simplified design for easier maintenance. It provides optimal performance in various conditions and100% isolation.
- Improved secondary seal: Capable of being lubricated without disassembly, simplifying valve maintenance.
- Double-seated design: Provides bi-directional flow and shut-off, ensuring 100% isolation and zero downstream leakage.
- Unobstructed flow: Eliminates turbulence and minimizes pressure drop across the valve while preventing solids from collecting and obstructing gate closure.
Size Range
NPS 3 - 60 (DN 80 - 1500)
Temperature Rating
Up to 400 °F (180 °C)
Pressure Rating
100 psi
The Clarkson KGD wafer style slurry knife gate valve is a high-quality, bi-directional isolation valve designed for optimal performance, durability, and reliability. Ideal for heavy-duty applications requiring ultimate sealing, it offers the latest in elastomer technology with the Mark III sleeve design.
- 100% isolation, bubble-tight shut-off - ensures absolutely zero downstream leakage.
- Double-seated design - provides bi-directional flow and shut-off, allowing for smooth operation.
- Unobstructed flow - eliminates turbulence, minimizes pressure drop across the valve, and prevents any accumulation of solids.
Size Range
NPS 2 to 24 (DN 50 to 600)
Temperature Rating
Up to 300°F (150°C)
Pressure Rating
Up to 200 psi (14 bar) CWP
Expert Insights
Victor Mwaba
Mining operations typically require significant volumes of water to...
Mining Engineering Apr 2026, Optimization of Water Usage is Critical for Mine Productivity and Sustainability; by Brian Hays and Victor Mwaba https://me.smenet.org/optimization-of-water-usage-is-critical-for-mine-productivity-and-sustainability/
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Andy Coxall
Improving Tailings Management in Mining Operations
Andy Coxall joins podcast host Jim Cahill to discuss the challenges in tailings management, the problems with valves not suited for this severe-service application, and why severe-service knife gate valve technology such as the Clarkson KS1 is the best choice for these challenging slurry applications.
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Justin Miller
Slurry, Corrosion, Remote Operations and Water: Valves That Keep Mines...
Valve failures in mining drive unplanned downtime, safety hazards, environmental exposure, and lost production. Abrasive slurries, cavitation, and corrosive acids each attack valves in different ways, yet all lead to the same outcome: shortened service life and rising maintenance costs. A podcast analyzing available solutions.
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