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
€9,18
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
Ratings And Reviews
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