Honeywell E121-1/2"A Air vent E121-1/2"A

Automatic air vent Honeywell E121-1/2A is a reliable brass valve designed for automatic removal of air from heating and hot water systems. The device is installed at high points of pipelines where gas bubbles naturally accumulate. Air accumulation reduces system efficiency, causes noise and corrosion, and the air vent solves this problem automatically without human intervention. Main characteristics: Part numbers E121-1/2A, 534.160.001. Manufacturer Honeywell / Resideo (Germany). Type Automatic, float type. Connection External thread G 1/2". Max pressure 10 bar. Max temperature 110°C. Working medium Water or water-glycol mixture up to 50%. Materials Body and cover — brass; float — heat-resistant plastic; seals — elastomer. Dimensions 47 x 47 x 79 mm. Key features: Fully automatic operation: Inside the body there is a float that rises when the system is filled with water and hermetically closes the exhaust valve. When air accumulates, the water level drops, the float lowers and opens the hole to release gas. Ease of maintenance: The model comes with shut-off valve Z121A. This allows removal and cleaning of the air vent or replacement of seals without draining water from the entire system. Prevention of noise and corrosion: Elimination of air locks ensures silent circulation of coolant and protects internal metal surfaces of radiators and pipes from oxygen corrosion. Stable operation over a wide range: The device remains operational at pressures up to 10 bar and temperatures up to 110°C, allowing its use both in private homes with low parameters and in multi-apartment and commercial buildings.