Description

Lenor Triple Eccentric Butterfly Valves’ design incorporates torques in seating for tight shutoff or control even in the toughest application.

Valves come standard with a laminated disc seal and graphite layers carefully assembled between stainless steel layers with reliable high temperature resistance and seat tightness. Torque seating during closing of the valve provides friction free sealing for long cycle life. Based on suitability of the intended service, seat options may include PTFE seat of metal seat.

Introduction

When it comes to industrial flow control, precision, durability, and leak-proof performance are essential. One valve that consistently delivers on all fronts is the triple eccentric butterfly valve. With an innovative design engineered for demanding conditions, these valves are a preferred solution across multiple industries. Let’s explore what makes them stand out and where they are best used.

Design and Function of Triple Eccentric Butterfly Valves

What Are the Three Eccentricities?

The term “triple eccentric” refers to three critical offsets in the valve’s design:

Shaft Offset – The first offset moves the shaft behind the centerline of the sealing surface.

Disc Offset – The second offset shifts the shaft from the pipe and valve centerline.

Seat Geometry Offset – The third introduces a conical shape to the seat, eliminating friction during opening/closing.

This triple offset design eliminates rubbing between the disc and seat, ensuring friction-free operation, extended service life, and precision shut-off.

How Does the Triple Eccentric Design Improve Sealing?

Because the disc only contacts the seat at the final moment of closure, the risk of wear and galling is significantly reduced. This means:

Tight shut-off in both directions
Zero leakage performance in high-pressure and high-temperature conditions
Reduced maintenance requirements

This makes triple eccentric butterfly valves an ideal choice where leak prevention and reliability are non-negotiable.

What Materials Are Typically Used?

To perform reliably in harsh environments, these valves are manufactured using high-grade materials tailored to the application:

Metal-to-metal seating for high temperatures and pressures
Disc materials like stainless steel, duplex, Inconel, or Hastelloy
Body coatings such as epoxy, PTFE, or ceramic to resist corrosion and erosion

This flexibility in materials means the valve can be custom-built for everything from aggressive chemicals to superheated steam.

Applications of Triple Eccentric Butterfly Valves

Oil and Gas Industry

Used extensively in pipelines, offshore rigs, and refineries, these valves provide safe and reliable shut-off for fluids such as crude oil, gas, and refined hydrocarbons. Their metal-seated construction withstands harsh conditions, while the low-maintenance design ensures long-term reliability.

Power Generation

In fossil fuel and nuclear power plants, these valves are vital for steam isolation, feedwater regulation, and cooling system control. Their rapid actuation and resistance to extreme temperatures make them ideal for boiler and turbine applications.

Chemical and Petrochemical Processing

Handling acids, solvents, and other corrosive fluids, triple eccentric butterfly valves meet strict safety regulations in chemical processing plants. Their tight shut-off capability supports critical containment processes, improving plant safety and compliance.

Water and Wastewater Treatment

Municipal and industrial treatment plants use these valves for reliable fluid isolation. Their ability to operate under fluctuating pressures and varying fluid conditions makes them perfect for wastewater, potable water, and chemical dosing lines.

Conclusion

The triple eccentric butterfly valve is more than just a piece of equipment—it’s a smart investment in efficiency, safety, and operational longevity. Whether you’re in oil and gas, power generation, chemical processing, or water treatment, this valve offers superior performance where it matters most.

KV Controls is a leading supplier of triple eccentric butterfly valves in South Africa and neighboring countries. With expert guidance, a wide product range, and reliable after-sales support, we’re ready to assist with your industrial valve requirements.

Explore our full range at KV Controls