Wholesale Double Eccentric Butterfly Valves Surfacing SS304 Sealing Manufacturer, Factories

Type: Double eccentric type

Series: D342X

Size: DN200-DN3000/4”-120”

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

Design standard: EN 593

Service: OEM&ODM

The double eccentric butterfly valve has two eccentricities relative to the centerline of the valve body, one is axial eccentricity is the axis of the valve stem deviates from the center of the butterfly plate; The second is radial eccentricity, which means that the axis of the valve stem deviates from the center of the valve body passage.

Product Description

1

Technical Specifications

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
2

Product 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 structure
3

Key Advantages

  • Reduced Friction: 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.
  • Superior Sealing: 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 with a leakage level of up to ANSI Class VI (zero leakage).
  • Durability: Allows the use of metal sealing rings (stainless steel, hard alloy) which can withstand higher temperatures and pressures (up to 200°C or higher).
Double eccentric butterfly valve advantages
4

Material Specifications

Body Plate Rotating Shaft Bushing Seat Operating Temp (°C)
Ductile Iron+SS304 Electroplated Nodular Cast Iron Stainless Steel PTFE EPDM Rubber -45~+135
Ductile Iron+SS304 Stainless Steel Carbon Steel PTFE Hypalon -18~+135
Carbon Steel+SS304 CF8M Stainless Steel - - Abrasion-Resistant Rubber -10~+50
- - - - Fluororubber -23~+150
- - - - PTFE +10~+150
5

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 pressure levels of PN1.0-PN1.6MPa.

Application 1
Application 2
Application 3
6

Packing & Dimensions

Standard export wooden case packaging ensures the safety of the valves during international transit.

Packaging
Dimensions Drawing

Frequently Asked Questions

What is the main benefit of a double eccentric structure?
The double eccentric design allows the butterfly plate to detach from the seat quickly upon opening, which significantly reduces friction, minimizes wear on the sealing surface, and extends the valve's service life.
Can these valves achieve zero leakage?
Yes, our eccentric butterfly valves are designed for high-performance sealing and can achieve zero leakage (ANSI Class VI), making them suitable for demanding industrial and municipal applications.
What temperature range can these valves handle?
Depending on the seat material (such as EPDM, PTFE, or Fluororubber), the temperature range typically spans from -45°C to +150°C, covering most water supply and industrial fluid needs.
Are these valves suitable for bidirectional sealing?
Yes, the eccentric butterfly valves are designed for bidirectional sealing, ensuring reliable performance regardless of the flow direction within the pipeline.
What industries commonly use eccentric butterfly valves?
They are widely used in urban water supply and drainage, HVAC systems, building fire protection, metallurgical hydropower, and circulating water systems in various industrial plants.
What packaging is used for international shipping?
We use standard export-grade wooden cases to provide maximum protection against moisture and physical damage during sea or air freight.

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