Product Model: D343W/H

Nominal Diameter: DN50–2000 mm

Nominal Pressure: PN0.6–4.0 MPa 

Applicable Temperature: -29 to 425°C

Applicable Media: Water, steam, oil, etc.

Connection Type: Flanged

Operation: Worm gear drive, Electric, Pneumatic, Hydraulic

I. Product Overview
This valve adopts a precise J-shaped elastic sealing ring and a triple-offset multi-layer metal hard-sealed structure. It is widely used in industrial pipelines such as metallurgy, power, petrochemical, water supply and drainage, and municipal construction with a medium temperature ≤ 425°C, for flow regulation and fluid shut-off. The valve adopts a triple-offset structure; both the valve seat and the disc sealing surfaces are made of stainless steel with different hardness levels, providing good corrosion resistance and a long service life. The product complies with the national standard GB/T 13927-92 for valve pressure testing.

II. Features of Flanged Multi-layer Metal Hard-sealed Butterfly Valve

1. This valve adopts a triple-offset sealing structure. There is almost no wear between the seat and the disc, providing a sealing function that becomes tighter as it closes.

2. The sealing ring is made of stainless steel, combining the dual advantages of metal hard sealing and elastic sealing. Whether at low or high temperatures, it maintains excellent sealing performance, along with corrosion resistance and a long service life.

3. The sealing surface of the disc is hardfaced with a cobalt-based hard alloy, making it wear-resistant and ensuring a long service life.

4. Large-size discs adopt a truss structure, featuring high strength, a large flow area, and low flow resistance.

5. The valve has a bidirectional sealing function. During installation, it is not limited by the flow direction of the medium nor affected by spatial position, allowing installation in any direction.

6. The driving device supports multi-position mounting (rotated by 90° or 180°), providing convenience for users.