Vertical Automatic Air Vent Valve

The Vertical Automatic Air Vent Valve is an essential component for maintaining peak efficiency and operational integrity in closed-loop water and heating systems. Its core function is to automatically detect and expel trapped air, or "air pockets," that accumulate at high points within pipelines, radiators, and boilers. By continuously purging this air, the valve prevents issues such as reduced heat transfer, flow restriction, corrosion (caused by oxygenated water), system noise (gurgling or knocking), and pump cavitation. This ensures optimal hydraulic performance, consistent temperature distribution, and prolonged equipment lifespan in residential and commercial HVAC applications.

Product Feature and Application

The Vertical Automatic Air Vent Valve efficiently releases trapped air from system high points through its buoyancy-driven mechanism. It features a durable brass or stainless steel body, corrosion-resistant internals, and a precision float that ensures reliable, maintenance-free operation. Its compact vertical design allows easy installation in confined spaces, while the automatic resealing function prevents liquid leakage once air is purged.

Essential in closed-loop heating systems (radiators, underfloor circuits), solar thermal installations, chilled water systems, and industrial hydraulic circuits. It eliminates airlocks, reduces noise and corrosion, and maintains peak heat transfer efficiency, ensuring stable operation in residential, commercial, and industrial HVAC applications.

Product Parameter (Specification)

Technical Specifications

Nominal Pressure: 1.0 MPa

Working Medium: Water

Operating Temperature: -0 °C ≤ T ≤ 110 °C

Product dimension

Installation guidelines

The Vertical Automatic Air Vent Valve must be installed strictly in a vertical, upright position to ensure proper float operation. It should be located at the highest point of the piping system or at air collection points where air is likely to accumulate, such as pump outlets or system risers. Before installation, check that the connection size and thread type match the pipeline, and apply appropriate sealing material to prevent leakage. It is strongly recommended to install a shut-off or isolation valve beneath the air vent to allow easy removal and maintenance without draining the system. During commissioning, keep the vent cap slightly loosened to allow trapped air to be released automatically. Ensure adequate clearance around the air vent for inspection, operation, and future servicing, and avoid installing it in areas exposed to freezing conditions or heavy vibration.