Check Valves Β· Swing Check Valves
CF8M Screw Swing Check Valves
CF8M screw swing check valves are the threaded-end, stainless execution of the swing check principle: a CF8M cast body with stainless seal and 304 stem, screwed into small-bore lines without flanges or welding. The benchmark execution covers DN15 to DN100 at PN10/16 and Class 125, for water, waste water and oil within -29 to 120 C.
Part of the Swing Check Valves family
Last updated: 2026-11
Specifications
| size range | DN15 to DN100 (1/4" to 4") |
|---|---|
| pressure class | PN10/16, Class 125 |
| pressure class | 200PSI/PN16 |
| body materials | CF8M, SS304, SS316 |
| temperature range | -29 to 120 C |
| design standards | DIN 2501 PN6/10/16, BS 5155, API 598, EN 12266 |
| seal materials | Stainless Steel |
| stem materials | Stainless Steel 304 |
| medium | Water, Waste Water, Oil |
| pipe size | DN15-DN200 |
| product size range | 1/2"-3" |
| applicable standards | ANSI BS DIN |
| body material grade | 304&316&304L&316L |
| spec sheet working pressure | 800 PSI WOG |
| temperature range spec | -20 ~ 232'C |
| suitable medium | Water, Oil, Air & Some Corrosive Liquid |
| thread options | NPT, BSPT, BSP, DIN259/2999 |
| dimensions 1 2 in | A 15, H 42, L 65 |
| dimensions 3 4 in | A 20, H 51, L 80 |
| dimensions 1 in | A 25, H 60, L 90 |
| dimensions 1 1 4 in | A 32, H 67, L 105 |
| dimensions 1 1 2 in | A 40, H 75, L 120 |
| dimensions 2 in | A 50, H 81, L 140 |
| dimensions 2 1 2 in | A 65, H 93, L 180 |
| dimensions 3 in | A 80, H 104, L 200 |
Application & selection guidance
Select this execution where small-bore stainless lines need a non-return point and hot work or flanging is not practical - utility water, waste water and oil circuits at DN15 to DN100. Fix the pressure envelope at PN10/16 or Class 125, confirm the -29 to 120 C window against the medium, and match the screwed connection to the piping thread standard.
Frequently asked questions
Why specify CF8M for a threaded swing check?
CF8M (cast 316-class) gives the pressure boundary chloride and general corrosion resistance that cast iron or carbon steel bodies cannot, at the small DN15 to DN100 bores where threaded installation is cheapest. The benchmark page pairs the CF8M body with a stainless seal and 304 stem, so the wetted trim stays stainless end to end.
What are the pressure and temperature limits?
The benchmark page declares PN10/16 and Class 125 ratings with a service window of -29 to 120 C, noting the exact pairing depends on the body and sealing surface materials. Stay inside both limits, and treat the temperature ceiling as the governing constraint near Class 125.
What information is needed to quote a CF8M screw swing check valve?
Nominal size within DN15 to DN100 (1/4 to 4 inch), the thread standard of the mating line, medium and temperature against the -29 to 120 C window, and the rating (PN10/16 or Class 125). Those points fix the casting and trim 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.
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