AUTOMATIC AIR-VENT SOLAR
Solar Automatic Air‑Vent Valve
Float‑operated automatic air‑release valve for solar heating systems
This Solar Automatic Air‑Vent Valve ensures continuous, maintenance‑free removal of air and gas trapped in closed-loop solar thermal circuits. Built for high-temperature glycol environments, it features a float‑operated valve mechanism to purge air during system filling and operation—protecting efficiency and preventing corrosion, overheating, noise, and pump issues. Ideal when installed at high points such as panel summits or near buffer tanks
Product Details
Technical Specifications
Feature | Specification |
|---|---|
Connection Size | ½″ male threaded (ISO 228‑1 or NPT) |
Body & Cover Material | Chrome‑plated brass (CW617N) |
Float Material | High‑resistance polymer |
Seals | EPDM / NBR elastomer (heat‑resistant) |
Operating Temperature Range | –30 °C to +180 °C (–20 °F to +360 °F) |
Maximum Working Pressure | 10 bar (150 psi) |
Maximum Air Discharge Pressure | 5 bar (≈ 75 psi); some variants 2.5 bar |
Glycol Compatibility | Up to 50 % mixture with water |
Installation Position | Vertical, at system high points (e.g. solar panel headers, tanks) |
Maintenance Instructions | Requires shut-off valve upstream for isolation during servicing or commissioning |
Typical Configuration | Often paired with shut-off ball valve |
Flow Capacity | Designed for fast air purge during filling and operation; see datasheets for l/h vs pressure curves |
