Custom Double Eccentric Butterfly Valves SS304 Sealing - China Suppliers and Factory for D342X Series Manufacturers, Factories

Type: Double Eccentric Butterfly Valve

Series: D342X

Size: DN200-DN3000 / 4 - 120

Pressure Rating: PN6 / PN10 / PN16 / 5K / 10K / 150LB

Design Standard: EN 593

Service: OEM & ODM

Our double eccentric butterfly valves, designed in accordance with EN 593 standards, feature dual eccentricities that enhance performance. The axial eccentricity places the valve stem off-center from the butterfly plate, while the radial eccentricity shifts it away from the center of the valve body's passage. As a leading supplier and factory in China, we ensure our products meet the highest quality standards for optimum reliability in various industrial applications.

Product Description

Valve Type: Eccentric butterfly valve Structure: Eccentric
Standard: EN593 Workmanship: Investment casting
Sealing direction: Bidirectional Sealing grade: Zero leakage
Temperature: -20°C<T<120°C Operation: Handle/Lever

Characteristics

The eccentric butterfly valve adopting a double eccentric structure design, it has the functions of intercepting, connecting, and regulating flow, which can meet the diverse needs of urban water supply and drainage, building fire protection, metallurgical hydropower and other system pipelines. Its sealing surface is welded with stainless steel material, combined with a dual sealing ring structure, which effectively solves the problem of shaft hole leakage while improving corrosion resistance. The product achieves or exceeds the national standard level in performance indicators through the application of flow field simulation and stress measurement technology.

Eccentric butterfly valve characteristics structure

Advantages

1.
The axis of the valve stem deviates from the center of the sealing surface and the center of the pipeline, causing the butterfly plate to quickly detach or come into contact with the valve seat during the opening and closing process, greatly reducing friction. Significantly reduce the wear of the sealing surface, extend the service life of the valve seat and butterfly plate, especially suitable for frequent operation occasions.
2.
The eccentric structure utilizes the principle of mechanical torque to generate stronger sealing pressure during closure, ensuring a tight seal. It can achieve bidirectional sealing (partially designed), with a leakage level of up to ANSI Class VI (zero leakage), suitable for demanding working conditions.
3.
The eccentric structure allows the use of metal sealing rings (such as stainless steel, hard alloy) instead of traditional rubber soft seals, which can withstand higher temperatures and pressures (commonly up to 200 ° C or higher, PN16-PN40 or higher). Can be used for complex media such as steam, gas, corrosive fluids, granular slurries, etc.
Eccentric butterfly valve advantages

Packing

Standard export wooden case packaging

Standard export wooden case packing

Application Scenarios

The double eccentric butterfly valves are suitable for room temperature clean water, cooling water, circulating water systems, as well as municipal water supply, building pipelines, fire protection pipelines, etc. They are generally suitable for applications with pressure levels of PN1.0-PN1.6MPa.

Application scenario clean water system
Application scenario pipeline system
Application scenario industrial water supply

Frequently Asked Questions (FAQ)

Q1 What is the manufacturing standard for this eccentric butterfly valve?

The valve is manufactured in strict accordance with the EN593 standard, utilizing precision investment casting workmanship to ensure superior structural strength and performance.

Q2 How does the double eccentric structure reduce seat wear?

The valve stem axis is offset from both the sealing surface and the pipeline center. This allows the butterfly disc to detach immediately upon opening and contact the seat only at the moment of closing, minimizing friction and extending service life.

Q3 Does the valve support bidirectional sealing?

Yes, this eccentric butterfly valve supports bidirectional sealing capability, achieving a zero leakage grade (up to ANSI Class VI) under designated operating pressures.

Q4 What are the allowable operating temperatures and pressure ratings?

The standard configuration operates within a temperature range of -20°C < T < 120°C and is typically suitable for working pressures ranging from PN1.0 to PN1.6 MPa.

Q5 What primary application scenarios is this valve suitable for?

It is widely used in urban water supply and drainage, circulating and cooling water systems, building fire protection pipelines, and metallurgical or hydropower piping networks.

Q6 How are the valves packaged for international delivery?

All products are packed using standard export wooden cases to ensure safe, damage-free transport during long-distance shipping.

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