Spirax Sarco AV13 Air Vent

This balanced pressure thermostatic Spirax air vent is engineered specifically for steam systems, where trapped air can quietly drain efficiency and drive up costs. When you first fire up a system, the AV13 discharges large volumes of cold air at full bore, clearing the way for steam to circulate fast. During operation, it opens automatically whenever air collects, so a system reaches and holds peak steam temperatures.

Why does this matter? Trapped air acts as an insulator, slowing heat transfer and dragging down temperatures across a system. By removing that air, the AV13 promotes even heating and cuts energy waste. It also eliminates incondensable gases that accelerate corrosion, reducing the risk of system damage and lowering ongoing maintenance costs. Built with a durable brass body and cap, the AV13 handles a maximum operating temperature of 260°C and a maximum operating pressure of 13 bar, delivering reliable performance in demanding industrial environments.

Summary: 

• A balanced pressure thermostatic air vent specifically for steam systems 
• Discharges large volumes of cold air at full bore when the steam system is first turned on
• Opens during operation whenever air collects in the system, ensuring peak steam temperatures
• Trapped air acts as an insulator, reducing heat transfer and lowering temperatures
• Removing this air promotes even heating and saves energy
• Eliminates incondensable gases significantly reduces the risk of systems corrosion and lowers ongoing maintenance costs
• Maximum operating temperature of 260°
• Maximum operating pressure of 13bar
• Brass body and cap 

Commonly used in;

• Food & beverage processing
• Pharmaceutical & chemical manufacturing
• Textile manufacturing and, 
• HVAC & commerical buildings