Double Flanged Eccentric Butterfly Valve

A double flanged eccentric butterfly valve is a high-performance valve with unique structural characteristics and advantages. 

Structure and Working Principle

The valve stem axis of the double flanged eccentric butterfly valve deviates from both the center of the butterfly plate and the center of the valve body. When the valve is opened, the butterfly plate quickly separates from the valve seat, reducing friction and wear. In the closed position, the butterfly plate fits tightly against the valve seat to achieve sealing.

Advantages

Long Service Life: The structure that reduces friction and wear prolongs the service life of the valve.

Good Sealing Performance: The butterfly plate and the sealing ring have no sliding friction, and the sealing surface is wear-resistant, ensuring reliable sealing.

Low Operating Torque: The eccentric structure reduces the torque required for valve operation, making it easier to operate.

Quick Opening and Closing: It can be opened and closed quickly, improving work efficiency.

Applications

It is widely used in various industries such as water supply and drainage, power plants, steel mills, chemical engineering, and environmental facilities. It is especially suitable for water pipeline systems and can be used as a regulating and intercepting device.

Standard: EN593/ ISO 5752 /BS5155/AWWA C504

Flange drilling is according to DIN 2501, BS4504, ANSI B16.1

Working pressure: 10bar/16bar/25bar

Testing pressure:

Shell: 15bar/24bar/37.5bar

Seal: 11bar/17.6bar/27.5bar

Type: Double Flange Eccentric, Double Flange Concentric

Material:

Body: DI/CI /Carbon Steel/Stainless Steel

Disc: DI/Stainless steel 304/316,AL-Bronze

Shaft: Stainless steel410/416/420 , Seat :EPDM/NBR

Coating: Internal and external with fusion bonded epoxy coating min250μm