Check Valves Β· Dual Plate Check Valves
Rubber Lined Dual Plate Check Valves
Rubber lined dual plate check valves are the elastomer-sealed execution of the dual plate principle: two spring-assisted half plates close on an EPDM sealing surface. The benchmark execution covers DN50 to DN300 at PN6/10/16, ductile iron body, stainless steel plus EPDM seal, stainless 304 stem, flanged per DIN 2501 PN6/10/16 and BS 5155, rated -20 to 120 C for water and neutral liquids.
Part of the Dual Plate Check Valves family
Last updated: 2026-11
Specifications
| size range | DN50 to DN300 |
|---|---|
| pressure class | PN6/10/16 |
| body materials | Ductile Iron |
| temperature range | -20 to 120 C |
| design standards | DIN 2501 PN6/10/16, BS 5155 |
| seal materials | Stainless Steel + EPDM |
| stem materials | Stainless Steel 304 |
| medium | Water and neutral liquids |
Application & selection guidance
Specify this execution where fast, low-crack-pressure non-return duty on water or neutral liquids needs the elastomer sealing edge - typical of water works, HVAC and general process lines. Set PN6, PN10 or PN16 to the line class, keep the medium within water and neutral liquids (elastomer seats are not for hydrocarbons), and match the DIN flanging to the pipe standard.
Frequently asked questions
What does the rubber lining change on a dual plate check valve?
The sealing interface: the plates close on a stainless-steel-plus-EPDM seat, which seals tightly at low pressures and tolerates particles better than metal-to-metal seats. The benchmark page pairs it with a ductile iron body and stainless 304 stem for water and neutral liquids from -20 to 120 C.
Why dual plates instead of a single swing disc?
Two shorter plates travel half the distance and shut faster on flow reversal, with a slim wafer length and low cracking pressure. The benchmark execution covers DN50 to DN300 at PN6/10/16 in that form.
What information is needed to quote one?
Nominal size within DN50 to DN300, line pressure class (PN6/10/16), the medium - the EPDM-based seat limits this execution to water and neutral liquids - and the working temperature against -20 to 120 C.
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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