Double eccentric butterfly valve, also known as a high-performance butterfly valve, In the design, the valve rod is deviated from the center line of the sealing surface to form the first eccentricity, and then the valve rod is slightly deviated from the center line of the pipe to form the second eccentricity. The purpose of eccentricity is to open the butterfly plate to about 20 angles, and the valve seat and the butterfly plate sealing ring are separated, so as to reduce friction

Technical specification

Design & manufacturing standard as per ASME B16.34/API 6D/BS EN ISO 17292(BS5351)
Face-to-face standard as per ASME B16.10
Fanged ends standard as per ASME B16.5/ASME B 16.25/ASME B 16.11/ASME B 1.20.1
Testing & inspection standard as per API598/BS EN 12266(BS6755)
Fire-safe testing as per API 607/API 6FA

Product Range

Body material: Carbon steel, Stainless steel, Alloy steel,Monel, Duplex, Inconel, etc
Size range(s):2″～54″
End Connection: RF, RTJ
Pressure rating: Class150 – Class600
Working temperature: -46℃ – +200℃
Operation: lever, worm gear, electric, etc

Design Features

wafer type lug type double flange type 
Anti-Static Device
Blow-out Proof Stem
Fire safe Design