Air and dirt separator Termojet Dn32 (1 1/4")

The Termojet DN32 air and dirt separator is a combined 2-in-1 device that simultaneously removes air microbubbles and solid dirt particles from the heating system fluid. Connection DN32 (G 1¼"), flow capacity 5.0 m³/h, maximum temperature 110°C, pressure 10 bar, body — brass. One installation point — complete system protection.

How it works

The separator body combines two functional chambers. The heat carrier enters an expanded chamber where the flow velocity drops sharply. A coalescent insert in the upper section collects microbubbles — they merge and exit through the automatic air vent at the top. Solid particles — sludge, rust, sand — are heavier than the heat carrier and settle in the lower chamber. The drain valve at the bottom allows the accumulated sediment to be flushed without stopping the system — in a matter of seconds.

Technical specifications

Where and how it is used

The combined separator is the optimal choice for new and retrofitted systems requiring complete heat carrier purification at a single installation point.

• New heating system. At start-up the system releases a significant amount of gas and particles — the 2-in-1 separator solves both tasks at once.
• Mid-capacity gas boiler. DN32 covers systems with a heat carrier flow rate of up to 5.0 m³/h — residential houses and small offices.
• Underfloor heating system. Protects the manifold and distributor from air pockets and sludge deposits that disrupt even heat distribution.
• Heat pump. The combined separator provides comprehensive protection of the heat exchanger against air and non-magnetic particles. To protect against magnetite Fe₃O₄, additionally install a magnetic separator for heat pumps; more details on the Termojet heat pumps website.

Air and sludge impair heat transfer and cause corrosion, so removing them together helps maintain system efficiency and protects the heat exchanger from scale build-up.

Advantages

• 2-in-1 in a single body — fewer fittings, less space, lower installation cost compared to two separate devices.
• Dirt drain without stopping the system — a few seconds via the drain valve at the bottom.
• Coalescent insert — captures microbubbles unreachable by a standard air vent.
• Simultaneous protection of boiler, pump, and heat exchanger — from both air and mechanical particles.

Related products

If you have a specific layout where the air separator and dirt separator must be positioned at different points in the system — choose them separately: Air separator DN32 and Dirt separator DN32. Full range — Termojet separators — catalogue.