Air Release Valves Β· Single Orifice Air Valves
Flanged Single Orifice Air Valves
Flanged single orifice air valves are the flanged-body execution of the single-orifice principle: one float-controlled orifice releases entrained air from a pressurized line and admits air under vacuum. The benchmark execution spans DN50 to DN300 at PN10, PN16 and Class 125, with a ductile iron body, a stainless steel 304 float and flanging to EN 593, DIN 2501 PN6/10/16 and DIN 3202, rated from -20 to 180 C for water, oil or gas.
Part of the Single Orifice Air Valves family
Last updated: 2026-11
Specifications
| size range | DN50 to DN300 |
|---|---|
| pressure class | PN10, PN16, Class 125 |
| design standards | EN 593, DIN 2501 PN6/10/16, DIN 3202 |
| body materials | Ductile Iron |
| ball materials | Stainless Steel 304 |
| medium | Water, Oil, Gas |
| temperature range | -20 to 180 C |
| performance features | High sealing performance, Light torque, Small flow resistance, Reduced water hammer generation, Simple and convenient installation with interchangeable parts, 100% inspection before delivery |
Application & selection guidance
Choose the single-orifice execution where the line needs air release under pressure or vacuum protection at a single duty point; where bulk fill and drain air handling also matters, a compound (double-function) execution covers both stages in one body. Set the rating (PN10, PN16 or Class 125) and the flange standard to match the pipe class, and check the -20 to 180 C window against the medium.
Frequently asked questions
When is a single orifice air valve the right choice?
When the duty is releasing small air pockets that collect under pressure, or protecting against vacuum during drain-down, rather than bulk air exchange during fill. The benchmark page declares a DN50 to DN300 flanged body with a stainless 304 float for exactly this single-stage duty on water, oil and gas lines.
How does this differ from the screwed single-orifice execution?
Connection and rating span: this execution is flanged (EN 593, DIN 2501 PN6/10/16, DIN 3202) from DN50 to DN300 at PN10 to Class 125, whereas the screwed execution serves smaller screwed-end lines. The float material - stainless steel 304 - is the same on both.
What information is needed to quote one?
Nominal size within DN50 to DN300, line pressure class, medium and working temperature against the -20 to 180 C range. The flange standard then follows from the mating pipe class.
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.
Request a quote for Flanged Single Orifice Air Valves
Submit the requirement for this execution here β a quotation-ready inquiry states the parameters listed under the message field; the binding values are confirmed at quotation.
What happens to your details is described in our privacy notice.
Get a quotation for Flanged Single Orifice Air Valves
Send size, pressure class and materials for a quotation-ready inquiry β answered with documents and terms.
Request a Quote