During double eccentricity valve opening or closing, the valve plate sealing face will be deviated gradually from and pressed into gradually the valve seat sealing face .
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During double eccentricity valve opening or closing, the valve 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 butterfly plate and the valve seat during opening or closing. For the double-eccentricity butterfly valve, when the butterfly plate rotates from 0° to 8°-12°, the butterfly plate sealing face will break away from the valve seat sealing face completely, thus reducing the mechanical abrasion and the extrusion corner travel during opening or closing the butterfly valve. With the reduction of mechanical abrasion and extrusion, the sealing performance and service life of the butterfly valve will be improved greatly.
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:1 1/2″～24″
Pressure range: Class150～300
End connection: RF, RTJ
Working temperature:-46℃～+200℃
Operation: wrench, worm gear, electric, etc.
| Brand | 3D |
| Valve Type | Double Offset Butterfly Valve |
| Valve Material | Cast steel, stainless steel, special alloy, etc |
| Valve Test | 100% quantity tested before delivery |
| Valve Guarantee | 18 months from the date of dispatch ex works, or 12 months from date of commodity installation. |
| Valve Painting | Customer request |
| Valve Package | Wooden case |
| MOQ | No requirement |
| Valve Certificate | API 6D/CE/ISO9001/ISO14001 |
| Delivery Detail | Shipped in 4 or 6 weeks after payment |
| Port | SHANGHAI |
| Payment Terms | L/C,D/A,D/P,T/T |
| Certificate Offered | Packing List，Commercial Invoice，Test Reports and Material Certificates，Certificate of quality and quantity, Seller’s Certificate of Guarantee |