KFTE Eccentric Plug Valves are used to handle clean and dirty liquids, sludge, slurries and gases. They can be used for either isolation/shutoff or throttling/control services. Eccentric Plug Valves feature a rectangular port design that provides wide tolerance seating geometry for lasting superior shutoff. The eccentric plug action and resilient plug facings assure lasting dead-tight shutoff. Standard features include corrosion-resistant bearings, welded nickel seat, grit excluders, and adjustable stem seal packing.
1. Water and Wastewater Treatment
Application: Handling slurries, sludge, and abrasive fluids.
Why Suitable: The eccentric design reduces wear from particulates and ensures reliable shut-off, crucial in treatment plants with high solids content.
2. Mining and Mineral Processing
Application: Managing gritty slurries and tailings.
Why Suitable: Robust construction resists abrasion, while the cam action during operation prevents clogging by shearing through dense materials.
3. Chemical and Petrochemical Industries
Application: Controlling corrosive or viscous fluids.
Why Suitable: Corrosion-resistant materials (e.g., lined valves) and tight seals prevent leaks, even with aggressive chemicals.
4. Power Generation
Application: Steam, cooling water, and ash handling systems.
Why Suitable: High-pressure and temperature tolerance with minimal leakage risk, essential for plant efficiency and safety.
5. Oil and Gas
Application: Pipeline flow regulation, refinery processes.
Why Suitable: Durable in high-pressure environments and effective for throttling or isolation, even with viscous fluids like crude oil.
6. Marine and Offshore
Application: Ballast systems, fuel transfer, seawater cooling.
Why Suitable: Corrosion-resistant alloys withstand saltwater environments, and the design ensures reliability in remote or harsh conditions.
7. Pulp and Paper Industry
Application: Handling fibrous slurries and chemical additives.
Why Suitable: Shearing action of the plug prevents fiber entanglement, reducing maintenance in abrasive processes.
8. HVAC Systems
Application: Regulating water flow in heating/cooling systems.
Why Suitable: Precise throttling and tight shut-off enhance energy efficiency and control.
9. Agriculture
Application: Irrigation and drainage systems.
Why Suitable: Handles sediment-laden water without clogging, ensuring consistent operation in outdoor environments.
10. Fire Protection Systems
Application: Water supply control.
Why Suitable: Reliable sealing prevents leaks, and durability ensures readiness for emergency use.
11. General Industrial Services
Application: Frequent cycling in processes requiring regular valve operation.
Why Suitable: Cam action reduces seat wear, extending service life in high-cycle applications.
The Eccentric Plug Valve is a specialized type of rotary control valve known for its unique design and performance in challenging fluid-handling applications. Below are its key characteristics:
1. Eccentric Plug Design:
The plug is offset (eccentric) from the valve’s centerline, enabling a camming action during rotation. This design minimizes friction and wear by lifting the plug away from the seat before rotation, reducing abrasion.
2. Sealing Mechanism:
Utilizes a resilient seat (e.g., elastomeric linings) or metal-to-metal seating for tight shut-off. The plug contacts the seat at a single point, enhancing sealing efficiency, especially in abrasive or slurry services.
3. Low Operating Torque:
The eccentric motion reduces torque requirements, allowing easier manual operation or smaller actuators. This is advantageous in high-cycle applications.
4. Flow Direction and Throttling:
Often uni-directional, relying on flow pressure to assist sealing. Some designs permit bi-directional flow. Suitable for both on/off and throttling due to precise plug positioning.
5. Materials and Construction:
Constructed with corrosion-resistant materials (e.g., stainless steel, alloys) and may feature hardened coatings for abrasive services. Replaceable seats/liners extend service life.
6. Applications:
Ideal for slurries, wastewater, pulp/paper, mining, and chemical industries. Handles viscous fluids, solids, and corrosive media with reliable shut-off.
7. Pressure and Temperature Range:
Operates across a broad range of pressures and temperatures, dependent on material selection. Typically used in moderate to high-pressure systems.
8. Maintenance and Durability:
Designed for easy maintenance with replaceable seats and plugs. The eccentric action reduces wear, ensuring longevity even in harsh conditions.
9. Standards Compliance:
Conforms to industry standards (e.g., API, ANSI) for dimensional and performance reliability.
