Air Release Valves Β· Combination Air Release Valves
PN16 Compound Air Release Valves
PN16 compound air release valves are the large-orifice air-and-vacuum stage combined with a small-orifice releasing stage in one body: the benchmark execution covers DN50 to DN300 at PN10, PN16 and Class 125/150, with a ductile iron or carbon steel body and a stainless steel 304 float. Flanging follows EN 593, DIN 2501 PN6/10/16 and DIN 3202, so the unit bolts into water, oil or gas lines working from 0 to 80 C.
Part of the Combination Air Release Valves family
Last updated: 2026-11
Specifications
| size range | DN50 to DN300 |
|---|---|
| pressure class | PN10, PN16, Class 125/150 |
| design standards | EN 593, DIN 2501 PN6/10/16, DIN 3202 |
| body materials | Ductile Iron, Carbon Steel |
| ball materials | Stainless Steel 304 |
| medium | Water, Oil, Gas |
| temperature range | 0 to 80 C |
| internal parts | Barrel-shaped valve body; internal parts include floats, bushings, discs, plugs and valve stems |
| installation locations | Installed at the pump outlet or at the highest point of the pipeline (or where gas is closed in) to release accumulated air; quickly admits outside air under negative pressure to protect the pipeline |
| design generation | Second-generation integral structure combining large-orifice exhaust and small-orifice micro-exhaust |
Application & selection guidance
Size the orifice combination to the filling and draining profile of the line first - large bore for bulk air during fill, the small-orifice stage for residual release under pressure - then set the body rating (PN10, PN16 or Class 125/150) against the maximum line pressure, and confirm the stainless 304 float against the medium within the 0 to 80 C range.
Frequently asked questions
What does "compound" mean on an air release valve?
It means the single body combines both air functions: a large-orifice air-and-vacuum stage that admits or discharges air in bulk during filling and draining, and a small-orifice stage that vents air pockets that collect while the line runs under pressure. The benchmark page declares both stages in one DN50 to DN300 flanged unit.
Which pressure ratings does this execution cover?
PN10, PN16 and Class 125/150, flanged per DIN 2501 PN6/10/16 and DIN 3202. Match the flange drilling to the mating pipe standard rather than assuming interchangeability between the PN and Class tables.
What information is needed to quote a compound air release valve?
Nominal size within DN50 to DN300, the line pressure class, the medium (water, oil or gas per the benchmark page) and the working temperature against the 0 to 80 C limit. Those points fix the body material choice between ductile iron and carbon steel as well.
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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