For the structure of the triple-eccentricity seal butterfly valve, when the valve is under the complete open state, its butterfly plate sealing face will break away from the valve seat sealing face completely; when it is opened from 0 to 90°, the butterfly plate sealing face will break away from the valve seat sealing face upon opening; when it is closed from 90° to 0°, and only upon closing, the butterfly plate sealing face can contact and press onto the valve seat sealing face tightly. 

Design Features 

Design standard as per: API 609, ASME B16.34, GB/T12238, JB/T 8527. 

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;

For soft seat the leakage rate: ANSI B 16.104 Ⅵ. 

Product Range 

Body material: carbon steel, stainless steel, alloy steel

Nominal diameter: 2"～180"（DN50~DN4500） 

Pressure range:Class150～600（PN10~PN100） 

End connection: RF, RTJ 

Working temperature:-46℃～+200℃ 

Operation :  wrench, worm gear, electric, etc.