Butterfly valve
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Double-eccentricity Bufferfly Valve

Product Description:

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℃~+200℃ 
Operation :  wrench, worm gear, electric,etc. 

Design Features

Small installation space, light weight, and maintenance friendly;
Good sealing effect and long service life;
Simple structure and small opening/closing torque;
Good flow adjusting ability, high precision of flow characteristic curve and good dynamic adjustment stability;
Leakage rate: ANSI B 16.104 Ⅵ;



Range of application: water system, electricity, petroleum, chemical industry, papermaking, metallurgy, aerospace and other industries 

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