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DOUBLE OFFSET BUTTERFLY VALVE SERIES 5002
Dembla Double Offset Butterfly Valves are available in a Wide Range Of Materials, Sizes, Trim Forms And Other Features. A Comprehensive List Of Features Is Available For Immediate Navigation
Dembla High Performance Butterfly Valves are available in Wafer and Lug type designs conforming to API 609 standard. The Disc construction is Double Offset providing excellent controllability, bubble tight shut off, greater seat life and smooth operation.
Well supported shaft with heavy duty bearings ensure perfect alignment of seat and disc for smooth and trouble free operations. Valves have been rigorously tested to ensure industry performance requirements.
Design Features
- Valves designed to achieve bi-directional tight shut off for sizes upto 3000 NB ( with Elastomer soft seat
- Anti Blow out stem design
- Positioners
- Wide choice of various seat moe: EPDM I VITON I PTFE I RPTFE (GFT) I SS316
- Wafer,Lugged and Double Flanged design
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Technical Specification
| Parameter | Specification |
| Design Standard | API 609 / ASME B16.34 |
| Face-to-Face (F/F) | API 609 / EN 558 |
| Testing Standard | API 598 / EN 12266, FCI 70-2 |
| Fire Safe Standard | API 607 |
| End Connection | FLANGE / WAFER / LUG — B16.5, B16.47, EN1092-1, BUTTWELD — B16.25 |
| Valve Sizes | 2″ (50 mm) to 120″ (3000 mm) |
| Pressure Ratings |
Class 150, Class 300 Equivalent to DIN PN2.5, PN6, PN10, PN16, PN25, PN40 |
| Body Style |
Flanged (2″ to 128″) Lugged & Wafer (2” to 80”) |
| Seat Leakage Options |
Class VI for PTFE, EPDM, Viton Soft Seats Class IV for Flexible Metal Seats |
| Flow Direction | Bi-Directional |
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