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Float-Operated Automatic Air Vent for Water Pipelines and Pump Stations
This datasheet covers single-chamber automatic air release valves in cast iron with epoxy coating for automatic venting of accumulated air from water distribution pipelines, pump stations, and tank outlets.
| Parameter | Specification |
|---|---|
| Size Range | DN25 to DN100 (1" to 4") |
| Pressure Rating | PN10 / PN16 / Class 150 |
| Body Material | Cast iron GG25, epoxy coated inside and out |
| Float Material | Polyethylene or SS304 hollow float, leak tested |
| Orifice Size | 1.5 mm to 6 mm depending on pressure class |
| Temperature Range | 0°C to +80°C (water service) |
| Operating Principle | Float rises with water to close orifice; drops as air accumulates to vent |
| End Connections | Screwed NPT / BSPT, flanged BS EN 1092-1 PN10/16 |
| Features | Single chamber, float operated, small orifice, anti-shock, drain plug |
| Coating | Fusion-bonded epoxy (FBE) 250 µm minimum |
| Component | Material |
|---|---|
| Body | GG25 cast iron, sand cast, machined orifice and float chamber, epoxy coated |
| Cover | GG25 bolted cover with gasket groove and vent outlet |
| Float | Polyethylene or SS304 thin-walled hollow float, leak tested, guided by SS304 cage |
| Orifice Plug | Brass or SS316 precision-machined orifice with smooth edge to prevent float cutting |
| Seat | NBR or EPDM rubber seat ring, replaceable, captured in orifice plug |
| Guide | SS304 float guide cage with anti-rotation ribs |
| Gasket | EPDM rubber gasket for body/cover joint |
| Hardware | SS304 bolts, nuts, and washers for wet environment corrosion resistance |
| Test | Requirement |
|---|---|
| Test Standard | Hydrostatic shell test 1.5x PN; float action test at operating pressure |
| Certification | CE, ISO 9001, WRAS on request |
| Standard | Description |
|---|---|
| Design Standard | BS EN 1074-4 / AWWA C512 |
The Automatic Air Release Valve -- Single Chamber Cast Iron is designed, manufactured, and tested in accordance with applicable API / ASME / BS / ISO international standards. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
The standard and optional materials of construction - body, bonnet, wedge/disc, stem, gland and handwheel - are listed in the Materials of Construction table on this datasheet. Special-alloy and upgraded trims are available on request.
It is offered in a range of sizes as per the technical specification with standard ANSI / ASME pressure classes (PN ratings on request). Refer to the End Connection row in the Technical Specifications table on this datasheet for the exact ends offered for this valve.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.