Flanged Metal-Seated (Hard Seal) Butterfly Valve (D343H)

The flanged metal-seated butterfly valve with multi-layer hard seal uses a precision J-shaped elastic seal and a triple-eccentric, multi-layer metal sealing structure. It is widely applied in pipelines with media temperatures up to 425°C in metallurgy, power, petrochemical, water supply, and municipal engineering for flow regulation and fluid shut-off.
This valve adopts a triple-eccentric design, with both the seat and disc sealing surfaces made of stainless steel with different hardness levels for excellent corrosion resistance and long service life. The valve provides bidirectional sealing and meets the national standard GB/T13927-92 for valve pressure testing.

Key Features:
Triple-Eccentric Seal Design: Minimal wear between seat and disc ensures reliable sealing performance.
Stainless Steel Valve Body & Sealing: Combines metal hard seal and elastic seal advantages; maintains effective sealing at low and high temperatures, resistant to corrosion, and provides long service life.
Wear-Resistant Disc Surface: Disc sealing face overlaid with cobalt-based hard alloy for extended durability.
Reinforced Large Disc: Large discs use a ribbed structure for high strength, large flow area, and low flow resistance.
Bidirectional Sealing: Installation is independent of media flow direction and spatial orientation; can be installed in any direction.
Versatile Actuation: Drive units can be installed in multiple positions (90° or 180° rotation) for convenient operation.