Air separator Termojet DN32 (1¼") 110°C/10bar TJ-CA-DN32

TJ-CA-DN32 — a microbubble and dissolved gas separator for DN32 heating systems. Designed for systems with an output of 30–60 kW where DN32 is the main diameter of the supply pipe. Installed after the boiler on the supply and continuously removes gas from the heating fluid without any maintenance.

Technical Specifications

How It Works

Hot heating fluid from the boiler enters the expanded separator chamber — the flow velocity drops sharply. The honeycomb insert of welded copper wires placed inside significantly increases the contact surface area: air microbubbles adhere to the wires, merge with one another, and grow to a size at which buoyancy pushes them upward. From there they are removed through the automatic air vent on the cap. Dissolved gas in the heating fluid also exits as microbubbles when pressure drops and temperature rises — and is captured in the same way. The insert requires neither cleaning nor replacement.

Where It Is Used

• Gas boiler 30–60 kW. DN32 matches the heating fluid flow rate for boilers of this output. The separator is installed immediately after the boiler and prevents air locks from forming in the system.
• Two-circuit systems (radiators + underfloor heating). Air in the distribution unit and underfloor circuits is a common problem. A separator on the supply pipe upstream of the manifold resolves it at the root.
• System after pipe or radiator replacement. Every installation joint is a source of dissolved gas. The separator removes residual gas during the first weeks of operation of the new system.
• Boiler room with multiple circuits. A single DN32 separator at the boiler outlet protects all circuits simultaneously.

Advantages

• Flow rate of 3,7 m³/h — covers systems with an output of up to 60 kW at standard temperature differential.
• Maintenance-free operation — the honeycomb insert is permanently active, does not clog, and requires no replacement.
• Maximum temperature 110°C — suitable for non-condensing boilers and systems with elevated temperatures.
• Quiet heating — gas removal eliminates bubble noise in pipes and radiators.

Related Products

For simultaneous removal of air and dirt in a single housing — air and dirt separator DN32 TJ-CAD. If the system requires sludge protection on the return — add the dirt separator DN32 TJ-CD with a removable magnetic ring. All models in the Termojet separator catalogue.

Frequently Asked Questions

Is a separate automatic air vent needed if a separator is already installed?
The TJ-CA-DN32 air separator already has a built-in automatic air vent on the cap — a separate device in that section is not required. Automatic air vents on radiators remain in place and release large bubbles at the high points of the system; the separator handles the finer gas circulating in the pipework.

How do I choose the DN of an air separator: DN20, DN25, DN32, DN40, or DN50?
The DN of the separator must match the connection DN. For boilers up to 20 kW — typically DN20 or DN25; 30–60 kW — DN32; 60–100 kW — DN40; above 100 kW — DN50 and larger. Also take into account the actual heating fluid flow rate and the maximum permitted for the chosen DN.