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Worm Gear Flanged Metal Seated Butterfly Valve | DN50–2000 PN6-40

Worm Gear Flanged Metal Seated Butterfly Valve | DN50–2000 PN6-40

Industrial worm gear flanged metal seated butterfly valve for high-temperature water, steam, and oil pipeline systems. Available in DN50–2000 sizes with PN0.6–4.0MPa pressure ratings. Suitable for power plants, petrochemical, and industrial process control applications.

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Technical Specifications

Model

DV-BV-D343W/H
Nominal Size

DN50–2000 mm
Nominal Pressure

PN0.6–4.0 MPa
Applicable Temperature

-29°C to +425°C
Applicable Media

Water, Steam, Oil, etc.
Drive Type

Worm Gear, Electric, Pneumatic, Hydraulic
Design & Manufacturing Standard

GB/T 12238-2008
Face-to-Face Standard

GB/T 12221-2005
Flange Connection Standard

GB/T 9113
Pressure-Temperature Rating Standard

GB/T 12224-2005
Testing & Inspection Standard

GB/T 13927-2008

Discription

Product Overview

 

The Worm Gear Flanged Metal Seated Butterfly Valve adopts a precision-shaped elastic sealing ring combined with a triple-eccentric multi-layer metal sealing structure. It is widely used in metallurgy, power generation, petrochemical, water supply, drainage, and municipal pipeline systems with medium temperatures up to 425°C for flow regulation and shut-off applications.

The valve features a triple eccentric design that minimizes friction between the valve seat and disc sealing surfaces during operation. The sealing surfaces are manufactured from stainless steel and different hardness alloy materials, providing excellent corrosion resistance, wear resistance, and extended service life.

Key Features

 

  • Triple eccentric sealing structure minimizes wear between the valve seat and disc
  • Multi-layer metal sealing design provides reliable shut-off performance
  • Stainless steel sealing ring combines the advantages of metal sealing and elastic sealing
  • Excellent sealing performance under both low and high-temperature conditions
  • Strong corrosion resistance with long operational service life
  • Hard alloy welded sealing surface improves wear resistance and durability
  • Large-size butterfly disc adopts a truss structure for high strength and low flow resistance
  • Bidirectional sealing design allows installation without flow direction restrictions
  • Suitable for installation in various pipeline positions and orientations
  • Drive device supports multiple mounting positions (90° or 180° rotation) for convenient operation
  • Suitable for metallurgy, power generation, petrochemical, and municipal engineering systems

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