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Double-Eccentric Wafer-Type Butterfly Valve

  • Product Size: 2” to 72”
  • Pressure Rating: CL150 to CL300
  • Design Standard: API 609
  • Connection Types: WAFER, LUG, RF, RTJ, BW
  • Body Material: Carbon Steel, Alloy Steel, Stainless Steel, Duplex Steel, Nickel-Based Alloys, etc.
  • Applicable Media: Water, Steam, Oil Products, Corrosive Media, etc.

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Product Description:

Specification Parameters:

  • Product Size: 2” to 72”
  • Pressure Rating: CL150 to CL300
  • Design Standard: API 609
  • Connection Types: WAFER, LUG, RF, RTJ, BW
  • Body Material: Carbon Steel, Alloy Steel, Stainless Steel, Duplex Steel, Nickel-Based Alloys, etc.
  • Applicable Media: Water, Steam, Oil Products, Corrosive Media, etc.

Structural Characteristics:

The double-eccentric wafer-type butterfly valve features a double-eccentric design, where the centerline of the stem and the seat does not align with the centerline of the disc. This eccentric design reduces friction between the disc and the seat, enhancing the valve’s service life and sealing performance. Additionally, the wafer-type connection allows the valve to be clamped directly into the pipeline, eliminating the need for additional flange connections, resulting in simplified installation.

Body Material:

Common materials include cast iron, carbon steel, stainless steel, and others. Suitable valve body materials can be selected based on different working conditions.

Rated Pressure and Diameter:

The rated pressure range of the double-eccentric wafer-type butterfly valve is typically between several tens of megapascals to several hundred megapascals, with rated diameters ranging from several millimeters to several meters.

Seat Material:

The seat of the double-eccentric wafer-type butterfly valve typically utilizes wear-resistant and corrosion-resistant materials such as Polytetrafluoroethylene (PTFE) and Ethylene Propylene Diene Monomer (EPDM) to ensure excellent sealing performance.

Actuation Methods:

The double-eccentric wafer-type butterfly valve can be actuated manually, electrically, pneumatically, or via other methods, allowing for the selection of a suitable actuation method based on actual needs.

Operating Temperature Range:

The operating temperature range of the double-eccentric wafer-type butterfly valve is generally between -40℃ to +200℃, with the specific range depending on the choice of valve body and sealing materials.

Leakage Class:

The leakage class of the double-eccentric wafer-type butterfly valve is typically zero leakage or a sealed leakage class, ensuring excellent sealing performance in the closed state.

Application Fields:

The double-eccentric wafer-type butterfly valve is widely used in pipeline systems in industries such as petroleum, chemicals, pharmaceuticals, food processing, and water treatment to control the flow and pressure of media.

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