Air Release Valves Β· Single Orifice Air Valves
Screwed Single Release Air Valves
The screwed single release air valve is the threaded-connection, single-orifice execution of the air release family: a stainless steel float drops as accumulated air displaces the water column, vents it through a single orifice, and reseats when water returns. The benchmark execution covers DN50 to DN1200 line sizes at PN10, PN16 or Class 125 with a ductile iron body and an SS304 float ball.
Part of the Single Orifice Air Valves family
Last updated: 2026-11
Specifications
| size range | DN50-DN1200 |
|---|---|
| pressure class | PN10, PN16, Class125 |
| design standards | EN593, DIN 2501 PN6/10/16, DIN3202 |
| body materials | Ductile Iron |
| ball materials | Stainless Steel 304 |
| medium | Water, Oil, Gas |
| temperature range | -20-180β |
| float material | ABS |
| seat material | EPDM |
| cover material | Ductile Iron |
| o ring material | EPDM |
| gasket material | EPDM |
| cap material | Nylon/Brass |
| isolation valve material | Brass |
| flange material | Ductile Iron |
| bracket material | Nylon |
| hinge pin material | Stainless Steel |
| adjusting screw material | Stainless Steel |
| nut material | Carbon Steel |
| washer material | Carbon Steel |
| hex bolt material | Carbon Steel |
| dimensions dn15 | W 132 x H 224 |
| dimensions dn20 | W 132 x H 224 |
| dimensions dn25 | W 132 x H 224 |
| dimensions dn32 | W 132 x H 224 |
Application & selection guidance
Select this execution for venting air pockets on water, oil or gas mains from DN50 up to DN1200, where a single release orifice is enough and the screwed end connection suits the mounting boss. Confirm the PN10, PN16 or Class 125 rating against line pressure and the -20 to 180 C temperature window against the medium, and that a ductile iron body with an SS304 float matches the service chemistry.
Frequently asked questions
What does single release mean on this air valve?
It vents through one orifice controlled by a single float, releasing air that collects at pipeline high points as it accumulates. Combination valves add a second large-orifice kinetic stage for pipeline filling; the single-release execution suits lines where air arrives steadily during operation rather than in large slugs at fill.
Which materials does this execution use?
The benchmark page lists a ductile iron body and a stainless steel 304 float ball, rated PN10, PN16 or Class 125 across water, oil and gas service from -20 to 180 C.
What information is needed to quote a screwed single release air valve?
The main line size between DN50 and DN1200, the pressure rating (PN10, PN16 or Class 125) against operating pressure, medium and temperature within -20 to 180 C, and the screwed end connection detail for the mounting boss.
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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