Double-eccentricity Butterfly Valve

During valve opening/closing, the bufferfly plate sealing face will be deviated gradually from and pressed into gradually

During valve opening/closing, the bufferfly plate sealing face will be deviated gradually from and pressed into

gradually the valve seat sealing face, thus reducing the mechanical abrasion and damage between the bufferfly

plate and the valve seat during opening/closing. For the double-eccentricity bufferfly valve, when the bufferfly plate

rotates from 0° to 8°-12°, the bufferfly plate sealing face will break away from the valve seat sealing face

completely, thus reducing the mechanical abrasion and and the extrusion corner travel during opening/closing

the butterfly valve. With the reduction of mechanical abrasion and extrusion,the sealing performance and service

life of the bufferfly valve will be improved greatly.

Technical Specifications

Design standard: API 609,GB/T 12238,ISO 5752

Face to face standard: ASME B16.10,GB/T 12221

Flange ends: ASME B16.5,ASME B16.47,GB/T 9113

Fire safe design:API 6FA ,API 607

Pressure test:API 598,GB/T 13927

Product Specifications

Body material: carbon steel, stainless steel, alloy steel

Nominal diameter: 2"~120"(DN50~DN3000)

Pressure range: Class150~600(PN10~PN100)

Working temperature:-196°C~+200°C

Operation : wrench, worm gear, electric,etc.

Double-eccentricity Butterfly Valve