Check Valves Β· Swing Check Valves
Double Disc Swing Check Valves (K302)
The K302 double-disc swing check execution splits the closure into two discs on a shared hinge pin, halving disc mass and shortening the travel to a 45-degree seat - the manufacturer states the seat angle minimises disc stroke and gives non-impact closing. It is a large-diameter water execution: the specification block runs DN1000 to DN15000 at PN10/16 in cast-iron or ductile-iron bodies.
Part of the Swing Check Valves family
Last updated: 2026-11
Specifications
| size range | DN1000-DN15000 |
|---|---|
| pressure class | PN10/16 |
| body materials | Cast iron, Ductile iron |
| temperature range | -20 - 120C |
| design standards | DIN 2501 PN6/10/16 |
| seal material | Cast iron, Ductile iron+Brass/ Ductile +NBR |
| stem material | Brass, SS |
| medium | Water, Waste Water, Oil |
Application & selection guidance
Use this execution for very large water, wastewater and sludge lines where a single-mass swing disc would slam: the maintenance-free, replaceable-disc construction and optional rubber lining are the stated differentiators for high-wear and corrosive duties. Confirm flange drilling to DIN 2501 and the medium temperature window -20 to 120 C.
Frequently asked questions
Why two discs instead of one?
Two discs on one hinge pin each carry half the mass and travel a shorter arc to the 45-degree seat, so closing energy - and therefore slam and water hammer - is lower than an equivalent single-disc swing check. The manufacturer also states the disc is the only moving part and can be replaced without removing the valve from the pipeline.
What sizes does this execution reach?
The specification block lists DN1000-DN15000 at PN10/16 to DIN 2501 PN6/10/16 - an extreme large-diameter water range; bodies are cast iron or ductile iron with brass/NBR sealing options.
Is it suitable for slurry and vertical flow?
The page states the unrestricted full-flow design suits slurries and sludges including vertical upward flow, with optional rubber lining for high-wear or corrosive applications; independent process, cycle and performance test report certification is stated as available on request.
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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