D343H Flange-type hard-sealed butterfly valve

Product Overview

The D343H flange-type hard-seal butterfly valve features a triple-excentric sealing structure, incorporating advanced international technology.

This product shares similar structural characteristics and is suitable for various pipelines as a shut-off or flow regulation device.

It is widely used in industries such as power generation, metallurgy, petroleum, chemical engineering, gas supply, urban water supply and drainage, and heating.

Product Features

The three-eccentric design reduces friction between the butterfly plate sealing surfaces during opening and closing, resulting in extended service life and easy maintenance.

The composite sealing ring on the vane combines the rigidity of metal with the elasticity of non-metallic materials, significantly enhancing the sealing performance.

The sealing performance between the vane plate and the valve seat is maintained through self-compensation via a "progressive pattern."

The seal integrity is unaffected by temperature changes;

The large-diameter butterfly valve features a turtle-back structure, offering rapid opening, high stiffness, high flow rate, and low flow resistance. This design prevents excessive deformation of the sealing ring when the butterfly valve is fully closed, thereby ensuring reliable performance.

Valve leakage caused by damage to the sealing ring;

Technical Parameter

Model: D343H

Design and manufacturing standard: JB/T 8527   Sealing test pressure: 1.76 MPa

Applicable media: water, steam, oils, etc.

Connection type: Flange connection

Nominal pressure: 1.6 MPa

Shell test pressure: 2.4 MPa

Media temperature: -40 to 200°C

Connection Standard: JB/T79

Structure Size 

Material List