Soft Seal Double Eccentric Flange Butterfly Valve

FYL is a professional manufacturer and supplier of industrial valves in China. The Soft Seal Double Eccentric Flange Butterfly Valve is one of our key products widely used in water treatment, sewage systems, petroleum, chemical industry, urban construction, and power plants. With reliable sealing performance, long service life, and competitive pricing, FYL provides stable valve solutions for customers worldwide. We also support OEM customization according to different project requirements.

The Soft Seal Double Eccentric Flange Butterfly Valve adopts advanced double eccentric structure design, effectively reducing friction between the sealing surfaces during opening and closing. Compared with traditional concentric butterfly valves, this design improves sealing reliability, reduces torque, and extends service life significantly. FYL focuses on quality manufacturing, strict inspection standards, and professional technical support to help customers improve pipeline system efficiency and safety.

Why Choose FYL Soft Seal Double Eccentric Flange Butterfly Valve

FYL has years of manufacturing experience in valve production and industrial fluid control solutions. Our factory in Tianjin China is equipped with modern processing equipment, testing instruments, and experienced technical teams. Every Soft Seal Double Eccentric Flange Butterfly Valve is manufactured under strict quality management procedures to ensure stable operation under different working conditions.

• Reliable soft sealing performance
• Double eccentric structure reduces wear
• Compact structure and easy installation
• Lower operating torque and energy saving
• Long service life and reduced maintenance costs
• Available for OEM and customized production
• Suitable for water, sewage, oil, gas, and chemical applications

Working Principle of Soft Seal Double Eccentric Flange Butterfly Valve

The center of rotation of the butterfly plate and the center line of the valve body form an offset structure. This double eccentric design allows the sealing surface of the disc to quickly separate from the valve seat during opening. When the butterfly plate rotates to approximately 8°-12°, the sealing surfaces are completely separated, greatly reducing friction and mechanical wear.

During full opening, a larger clearance is formed between the valve seat and butterfly plate, which minimizes extrusion deformation and improves sealing performance. This special structure helps the Soft Seal Double Eccentric Flange Butterfly Valve achieve smoother operation, longer durability, and better leak prevention compared with traditional butterfly valves.

Product Features

• Reasonable structure design with compact dimensions
• Convenient installation, dismantling, and maintenance
• Double eccentric structure effectively reduces friction
• T-type seal ring structure ensures reliable linear sealing
• Low torque operation and smooth opening/closing
• Excellent anti-corrosion performance
• Stable sealing under high-frequency operation
• Long service life with reduced maintenance requirements
• Available in multiple standards and connection types

Technical Advantages

FYL continuously improves production technology and valve performance to meet international industrial requirements. The valve body is manufactured with durable materials and precision machining technology to ensure dimensional accuracy and sealing stability.

The soft sealing structure effectively compensates for slight deformation caused by temperature or pressure fluctuations, ensuring reliable operation under complex working conditions. The optimized flow channel design also reduces pressure loss inside the pipeline system.

Compared with ordinary butterfly valves, the Soft Seal Double Eccentric Flange Butterfly Valve offers:

• Better sealing reliability
• Reduced seat wear
• Lower maintenance frequency
• Longer operational lifespan
• Improved flow control performance
• Higher operational stability

Material Options

To meet different industrial environments and media requirements, FYL provides multiple material configurations:

• Valve Body: Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel
• Disc Material: Stainless Steel, Ductile Iron, Bronze
• Seat Material: EPDM, NBR, PTFE
• Shaft Material: Stainless Steel 304 / 316

Customized materials are also available according to project specifications and operating environments.

Application Industries

The FYL Soft Seal Double Eccentric Flange Butterfly Valve is widely used in:

• Water treatment plants
• Sewage treatment systems
• Petroleum and gas pipelines
• Chemical processing plants
• Food processing industry
• Power stations
• HVAC systems
• Urban water supply projects
• Environmental protection engineering
• Industrial fluid control systems

OEM & Customized Service

FYL provides professional OEM and customized manufacturing services for global customers. Our engineers can adjust valve dimensions, materials, pressure ratings, flange standards, and surface treatment according to customer drawings or technical requirements.

We understand that different industries require different solutions. Therefore, our technical team works closely with customers to provide suitable valve products for various applications and operating environments.

Production & Quality Control

Our factory was established in 2010 and has accumulated rich experience in manufacturing industrial valves and water conservancy equipment. The production process includes raw material inspection, precision machining, assembly testing, pressure testing, and final quality inspection.

Each Soft Seal Double Eccentric Flange Butterfly Valve undergoes strict testing before delivery to ensure sealing reliability and operational safety.

• Pressure testing
• Sealing leakage testing
• Dimensional inspection
• Surface treatment inspection
• Operational performance testing

Global Market & Export Experience

FYL products have been exported to Europe, America, Southeast Asia, the Middle East, and many other international markets. With stable quality and professional service, we have established long-term cooperation with customers from different industries worldwide.

Our company continues expanding overseas business and improving manufacturing capabilities to provide efficient valve solutions for global clients.

Main connection dimensions

Main connection dimensions

Our Service

Pre-Sales Service

• 24/7 online consultation
• Technical support and valve selection assistance
• Customized solution recommendations
• Fast quotation response

In-Sales Service

• Production progress updates
• Strict quality inspection
• Professional export packaging
• Timely shipment arrangements

After-Sales Service

• Installation guidance
• Technical troubleshooting support
• Product maintenance assistance
• Long-term customer service support

Frequently Asked Questions

What is the advantage of double eccentric butterfly valve design?

The double eccentric structure reduces friction between the sealing surfaces, improves sealing performance, lowers operating torque, and extends service life.

Can FYL provide OEM services?

Yes. FYL supports OEM manufacturing and customized production according to customer drawings or technical requirements.

What industries can use the Soft Seal Double Eccentric Flange Butterfly Valve?

The valve is suitable for water treatment, sewage systems, petroleum, chemical industry, power plants, food industry, and many industrial fluid control systems.

What sealing materials are available?

We can provide EPDM, NBR, PTFE, and other sealing materials according to different working conditions and media requirements.

How does FYL ensure product quality?

Every valve undergoes strict pressure testing, sealing inspection, and operational testing before shipment to ensure stable and reliable performance.

Send Inquiry

FYL welcomes inquiries from customers all over the world. If you are looking for reliable industrial valve solutions, please contact us for product details, quotations, and customized services.