Three-Eccentric Metal Hard Seal Butterfly Valve

1. Three-Eccentric Design: Frictionless sealing, extending service life.
2. Radial Dynamic Balanced Sealing System: Reduces operating torque, ensures two-way sealing.
3. Composite Material Sealing Ring: Environmentally friendly, wear-resistant, high leakage standard.
4. Replaceable Seat Ring: Facilitates on-site maintenance.
5. High-Performance Packing Sealing: Leakage ≤20 PPM, extends maintenance-free period.

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Description

Three-Eccentric Structure: Adds an angular eccentric to achieve “non-friction” sealing during valve operation, greatly extending the valve’s service life.
Radial Dynamic Balanced Sealing System: Utilizes national patented technology to balance the forces on both sides of the butterfly plate inlet and outlet, reducing the valve opening torque to 1/3 of that of common butterfly valves, ensuring reliable two-way sealing.
Composite Material Sealing Ring: The butterfly plate’s sealing ring is made from a composite of stainless steel, graphite, carbon fiber, and PTFE, offering better environmental protection, wear resistance, anti-flush properties, and reliability, with leakage rates meeting ANSI B16.104 WI or ISO5208 A standards.
Replaceable Seat Ring/Seal Ring Design: Facilitates on-site maintenance with optimized material selection and sealing structure based on actual working conditions.
High-Performance Packing Sealing: Features a packing-combined sealing system with a leakage rate ≤20 PPM, extending the maintenance-free period. The valve stem is designed with a “blow-out structure” in accordance with API 609 standards.

Three Eccentric Butterfly Valve FAQs

1. How do butt welded hard seal three eccentric butterfly valves ensure reliability in harsh environments?

Butt welded hard seal three eccentric butterfly valves are designed for maximum reliability in severe service conditions. The butt-welded connection provides a robust, leak-proof joint, crucial for high-pressure or vibrating systems.

2. What emerging industry applications benefit from three eccentric butterfly valve technology?

Three eccentric butterfly valves are increasingly critical in emerging sectors like hydrogen energy and lithium battery manufacturing. For instance, hydrogen energy electric three eccentric butterfly valve solutions are vital for controlling high-pressure hydrogen in production, storage, and fuel cell systems. Similarly, lithium battery electric three eccentric butterfly valve applications include managing corrosive media in lithium salt production and electrolyte preparation, where precise control and leak prevention are essential.

3. What makes the three-eccentric center butterfly valve suitable for high-temperature applications?

The three-eccentric center butterfly valve utilizes an all-metal hard seal construction, which inherently withstands extreme temperatures far better than soft-seated alternatives. The triple offset design ensures the metal disc and seat only make contact at the final point of closure, preventing thermal expansion from causing the valve to jam or gall during operation.

4. Can a high quality three eccentric butterfly valve achieve zero leakage?

Yes, a high quality three eccentric butterfly valve is engineered to achieve zero or bubble-tight leakage. The precision-machined conical sealing profile, combined with the triple offset geometry, creates a uniform, tight seal across the entire circumference of the seat, meeting stringent international leakage standards (such as API 598 or FCI 70-2 Class VI).

5. How do I select the right material for a stainless steel electric three eccentric butterfly valve?

Selecting the material for a stainless steel electric three eccentric butterfly valve depends entirely on the media’s corrosiveness, temperature, and pressure. For general corrosive environments, 304 or 316 stainless steel is common. For highly aggressive media (like chlorides or acids), duplex stainless steels or special alloys (e.g., Hastelloy, Monel) are necessary to ensure longevity and safety.

6. What industries do you serve?

We serve Oil & Gas, Metallurgy, Water Treatment, Paper & Pulp, Chemical, and Power Generation sectors.

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