Butterfly Valves Β· Wafer Butterfly Valves
PTFE Lined Wafer Butterfly Valves
PTFE lined wafer butterfly valves carry a PTFE sealing route (CF8 + PTFE seat) inside a wafer body, so the wetted surface resists the acids, alkalis and solvents that attack elastomer liners, while keeping the wafer clamp short and light. The benchmark execution spans DN40 to DN1200 at PN10/PN16, with ISO 5211 top flange for direct actuation.
Part of the Wafer Butterfly Valves family
Last updated: 2026-11
Specifications
| size range | DN40 to DN1200 (1.5" to 48") |
|---|---|
| pressure class | PN10/PN16 |
| seat materials | CF8 + PTFE |
| stem materials | Stainless Steel, nickel-copper alloy K500 |
| body materials | CI, DI, WCB, CF3, CF3M, CF8, CF8M |
| design standards | EN 593, DIN 2501 PN6/10/16, DIN 3202 K1 |
| testing standards | API 598 |
| face to face | API 609, MSS SP-67, DIN 3202, BS EN 558-1 |
| valve design | API 609, MSS SP-67 |
| flange drilling | ANSI B16.1 Class 125, BS 4504 PN10/PN16, DIN 2501 PN10/PN16 |
| top flange | ISO 5211 |
Application & selection guidance
Select this execution for corrosive media - chemical and petrochemical transfer, water treatment, shipbuilding and general industry - where an elastomer-lined body would swell or age but the duty stays within PN10/PN16. Size inside DN40 to DN1200, match the flange drilling (ANSI B16.1 Class 125, BS 4504 or DIN 2501 PN10/PN16) to the mating pipe, and use the ISO 5211 top flange for lever, gear or actuated operation.
Frequently asked questions
When is a PTFE seal worth it on a wafer butterfly valve?
PTFE resists nearly the whole acids, alkalis and solvents spectrum and does not take a compression set the way elastomers do, so it suits corrosive duty and infrequent cycling. The benchmark page declares the seal as CF8 + PTFE with stainless steel or nickel-copper alloy K500 stems, and design per API 609 / MSS SP-67 with ISO 5211 top flange.
Which flange drilling does the wafer body match?
The benchmark page declares ANSI B16.1 Class 125, BS 4504 PN10/PN16 and DIN 2501 PN10/PN16 drillings, with face-to-face per API 609, MSS SP-67, DIN 3202 and BS EN 558-1. Match the drilling to the mating flange standard rather than assuming cross-compatibility across the DN40 to DN1200 range.
What information is needed to quote a PTFE lined wafer butterfly valve?
Nominal size within DN40 to DN1200, the PN10 or PN16 rating, the mating flange drilling standard, medium and temperature (PTFE limits apply), and the operation mode against the ISO 5211 top flange. Those points fix the body and seal build for quotation.
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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