Butterfly Valves Β· Triple Offset Butterfly Valves
Wafer Triple Offset Butterfly Valves
Wafer triple offset butterfly valves combine the compact wafer clamp of the butterfly family with the third-offset geometry that cams the disc off the seat before travel, so the metal-to-metal seal (stainless steel with graphite) closes without friction and without elastomer temperature limits. The benchmark execution covers DN50 to DN600 at PN10 to PN63 and Class 150 to Class 1500, gear, electric or pneumatic operation.
Part of the Triple Offset Butterfly Valves family
Last updated: 2026-11
Specifications
| size range | DN50 to DN600 |
|---|---|
| pressure class | PN10 to PN63, Class 150 to Class 1500 |
| seat materials | Stainless Steel + Graphite |
| disc materials | Ductile Iron, SS304, SS316, Aluminium Bronze |
| stem materials | SS410, SS420, SS416, SS431 |
| body materials | Ductile Iron, WCB, SS304, SS316 |
| end connections | Wafer Type |
| operation | Gear Operated, Electric Actuated, Pneumatic Actuated |
| design standards | API 609, DIN 2559, EN 593 |
| testing standards | API 598 |
| face to face | ASME B16.5, DIN 3202 F4, EN 558-1 |
| body seat materials | 13Cr, cobalt-chromium hardfacing alloy, SS304, SS316 |
| flange standards | DIN, ANSI B16.1, BS 4504, EN 1092 |
Application & selection guidance
Select the wafer execution where face-to-face length and weight dominate - long pipe runs, skids and retrofits between existing flanges - and the duty is hot, abrasive or fire-exposed enough to rule out resilient seated executions. Size inside DN50 to DN600 against PN10 to PN63 or Class 150 to Class 1500, confirm the laminated stainless-and-graphite seal against the medium, and match the wafer profile to DIN 3202 F4 or EN 558-1.
Frequently asked questions
What does the third offset contribute in a wafer body?
The third offset angles the seat cone so the disc clears the seat immediately on opening and cams into it only at closure, eliminating rubbing travel. That is what lets this execution run a metal seal (stainless steel with graphite per the benchmark page) instead of a resilient liner, extending the temperature and fire-safe envelope while keeping the wafer clamp short.
Which actuation should I pick?
The benchmark page declares gear, electric actuated and pneumatic actuated operation. Gear is the default for manual duty across DN50 to DN600; electric suits remote throttling without instrument air; pneumatic gives the fastest stroking for process shutdown. Size the actuator against the PN10 to PN63 line rating and disc diameter.
What information is needed to quote a wafer triple offset butterfly valve?
Nominal size within DN50 to DN600, pressure class (PN10 to PN63 or Class 150 to Class 1500), body and disc material from the declared range (ductile iron, WCB, SS304, SS316 and aluminium bronze trims), operation mode, and the mating wafer standard (DIN 3202 F4 or EN 558-1). Those points fix the execution and clamp length.
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry β typical items for this execution (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
A quotation-ready inquiry states: nominal size and pressure rating, body and seat material preference, end connection, operation, and the service medium with temperature. Typical values on this page are benchmark reference ranges; the binding values are confirmed at quotation.
Sample & supply
Supply terms, order quantities and lead time are agreed per order β state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, keep end-face protectors on until installation, and for elastomer- or PTFE-seated executions avoid prolonged outdoor storage β seat compounds age fastest in direct sunlight and freezing conditions.
Knowledge: selection guides
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