API · ASME · DIN · EN standard industrial valves
Tilting Disc Check Valves
Tilting disc check valves pivot a disc on an offset shaft, so the disc opens early under low forward flow and tilts closed with the flow rather than against it — the design large water and utility lines use to keep surge quiet. The range covers a large-diameter series at DN250 to DN1400 rated PN1.0 to PN2.5, with ductile iron or cast iron body and disc, SS420/SS431 shaft, SS304 body seat and EPDM/NBR disc seal ring. Design follows BS EN 12334 with EN558-1 / DIN3202 F4 face-to-face and EN1092 / DIN250 flanges. Selection turns on line diameter, the low PN rating of this execution, and the elastomer seal against the medium.
Part of the Check Valves family
Last updated: 2026-11
Family specifications
| size range | DN250 to DN1400 |
|---|---|
| pressure class | PN1.0 to PN2.5 |
| body materials | Ductile Iron, Cast Iron |
| disc materials | Ductile Iron, Cast Iron |
| seat materials | SS304 body seat, EPDM, NBR |
| end connections | Flanged |
| operation | Self-acting (automatic) |
| temperature range | -196°C to 570°C |
| design standards | BS EN 12334 |
| design standards | BS EN12334 |
| testing standards | API 598, API 6D, MSS |
| face to face | EN558-1, DIN3202 F4 |
| shaft materials | SS420, SS431 |
| flange standards | EN1092, DIN250 |
| kTd product name | SS 321 Y Type Tilting Disc Check Valve |
| kTd design standard | ASME B16.34 |
| kTd body material | Stainless Steel SS 321 |
| kTd example size | 6 Inch, DN150 |
| kTd example pressure | Class 2500 LB, PN420 |
| kTd end connection | BW End |
| kTd size range | NPS 2-24 Inch (DN50-DN600) |
| kTd pressure range | Class 150-2500 LB(PN10-PN420) |
| kTd material options | ASTM A216 WCB, WCC, A217 WC6, WC9, C5, C12A, A352 LCB, LCC, A351 CF8, CF8M, CF3M, CF8C |
| kTd end connections | Butt Welded (BW), Flanged (RF, RTJ) |
| kTd temperature range | -29°C to 595°C |
| kTd service media | Water, gas, oil, etc. |
| kTd design manufacture | ASME B16.34 |
| kTd face to face | ANSI B16.10 |
| kTd flange connection | ASME B16.5 |
| kTd butt weld end | ANSI B16.25 |
| kTd testing standards | API 598 |
| kTd seat design | Micro elastic metal seats |
| kTd closure | Impact-free closure |
| lTd design standard | API 598 |
| lTd example size | 2-1/2 Inch, DN65 |
| lTd example pressure | Class 150 LB, PN20 |
| lTd body material | ASTM A351 Grade CK3MCuN |
| lTd trim material | UNS S31254 |
| lTd nace requirement | MR0175 |
| lTd end connection | BW Ends, SCH 10S |
| mTd material options | Cast iron, Ductile iron, WCB, LCC, CF8M, SS304, SS316, SS316L, ASTM A105N, ASTM A182Gr-F304, ASTM A182Gr-F316 |
| mTd pressure class | 150 to 2500 |
| mTd nominal pressure | PN10 to PN450 |
| mTd size range | 1/2” to 40” |
| mTd end connections | Flanged, Wafer, lug, Threaded, Buttweld, Socketweld |
| body seat | SS304 |
| disc seal ring | EPDM, NBR |
| retainer ring | Carbon Steel+ss304 |
| shaft bearing | SS304 |
| o ring | EPDM |
| pin materials | SS420 |
| end cover | Carbon Steel+Epoxy |
| flange dimension | EN1092, DIN250 |
Ordering & documentation
Documents
Ask for the documentation set with the inquiry — typical items (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
Send the medium, temperature, pressure, size and connection for a quotation-ready inquiry. Lead time, MOQ and price are confirmed at quotation, together with the documents to be supplied with the order.
Sample & supply
Supply terms, order quantities and lead time are agreed per order — state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, and keep end-face protectors on until installation; storage limits and shipping arrangements for the selected materials are confirmed at quotation.
Frequently asked questions
What standards govern the design and testing of tilting disc check valves?
The published specification for this family lists BS EN 12334 as the design standards. Testing follows API 598, API 6D, MSS.
What sizes and pressure ratings are available for tilting disc check valves?
The published size range is DN250 to DN1400, and the published pressure ratings are PN1.0 to PN2.5. Availability of a specific size and rating is confirmed at quotation.
What materials are tilting disc check valves available in?
The published specification lists body materials: Ductile Iron, Cast Iron. Material availability for a specific size and rating is confirmed at quotation.
What working temperature range do tilting disc check valves cover?
The published working temperature range is -196°C to 570°C. For a medium at the edge of the range, confirm the suitability of the selected seat and body materials at quotation.
What end connections do tilting disc check valves support?
The published specification lists Flanged as the available end connections. The connection for a specific size is confirmed at quotation.
What should a quotation inquiry for tilting disc check valves include?
The governing standard and class, nominal size, body and seat materials, the service medium with temperature, and the destination — anything missing is confirmed during quotation.
Request a quote for tilting disc check valves
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Get a quotation for Tilting Disc Check Valves
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