Strainers · Y Strainers
Ductile Iron Y Strainers
The ductile iron Y strainer is the cast-ductile-iron body execution of the Y strainer family: an angled leg holds a perforated filter ahead of pumps, control valves and meters, catching debris in water, steam and gas lines. The benchmark execution covers DN15 to DN400 at PN10/16 with a cast steel filter element, apertures from 0.8 mm to 3 mm, and DIN 2501/2532/2533 flange drilling.
Part of the Y Strainers family
Last updated: 2026-11
Specifications
| size range | DN15-DN400 |
|---|---|
| pressure class | PN10/PN16 |
| design standards | DIN2501 PN10/PN16, DIN2532, DIN2533 |
| body materials | Ductile Iron |
| filter material | Cast steel |
| medium | Water, Steam, Gas |
| filter aperture | Ф0.8-Ф3mm |
| temperature range | 0 to 200℃ |
| cover materials | A105, F304, F304L, F316, F316L |
| gasket materials | Graphite+Stainless Steel |
| drain plug materials | A193 B7, A193 B8, A193 B8M |
| testing standards | API 598 |
Application & selection guidance
Select this execution for PN10/16 water supply, drainage, steam or gas lines that need inline debris protection up to 200 C, where the body can be ductile iron and the filter element cast steel. Size it from DN15 to DN400 against the line, and pick the filter aperture between 0.8 mm and 3 mm against what the protected equipment tolerates - finer for control valves and meters, coarser for pump protection. Confirm DIN 2501/2532/2533 flange drilling matches the mating pipework.
Frequently asked questions
Why a ductile iron body for a Y strainer?
Ductile iron gives the Y body higher impact tolerance than grey cast iron at a lower cost than steel, which suits fixed PN10/16 water, steam and gas service. The benchmark execution pairs it with a cast steel filter element, so the wear part is harder than the body that carries it.
How is the filter aperture chosen?
The source execution covers apertures from 0.8 mm to 3 mm. Protecting control valves, meters and steam traps calls for the finer end of that range; pump suction protection tolerates the coarser end. The total mesh area is sized at roughly three to four times nominal diameter, so pressure drop stays modest while the aperture decides what is caught.
What information is needed to quote a ductile iron Y strainer?
Nominal size within DN15 to DN400, PN10 or PN16 class, the medium (water, steam or gas) and its temperature up to 200 C, the filter aperture between 0.8 mm and 3 mm, and the DIN 2501/2532/2533 flange drilling to match the pipeline.
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry — 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 — 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 — seat compounds age fastest in direct sunlight and freezing conditions.
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