Rotary air separator Termojet Dn20 (3/4")

The Termojet TJV7G20 angled air separator solves the deaeration task where a straight unit does not fit the installation space: the 90° angled connection allows the separator to be installed in a narrow boiler room, distribution cabinet, or technical compartment without additional fittings and bypasses. DN20 (3/4") is the optimal size for boilers and heat exchangers with an equivalent connection port.

Technical Specifications

How It Works

The operating principle is identical to a straight separator: the heat carrier slows down in an expanded chamber, microbubbles settle on a coalescent insert made of welded copper wires, merge into larger bubbles, and are discharged through the automatic air vent at the top. The angled connection does not limit the deaeration efficiency in any way — the body design provides a full flow-deceleration zone regardless of the connection orientation.

Where and How It Is Used

• Boiler rooms in technical cabinets. A standard cabinet under the stairs or in a corridor often leaves no room for a straight separator on the supply pipe — the angled connection solves this with a single element.
• Compact boiler rooms for wall-mounted boilers. A wall-mounted boiler with small distances between ports — the angled design mounts "flush" without compromising efficiency.
• Plant rooms and manifold cabinets. With dense pipe routing, the angled separator form significantly simplifies the layout and reduces the number of additional elbow fittings.
• Boilers and heat exchangers with a G3/4" port. DN20 is the most common size in wall-mounted boilers up to 20 kW and in connection assemblies for small-volume buffer tanks.
• Alternative: if installation space allows — consider the straight air separator DN20; if dirt removal is also needed — the air and dirt separator DN20.

Advantages of Termojet TJV7G20

• 90° angled connection — reduces the number of elbow fittings and minimises installation work.
• Coalescent insert of welded copper wires — effective merging and discharge of microbubbles without a filter element requiring replacement.
• Brass body, 110°C / 10 bar — full compliance with the operating conditions of standard heating systems.
• The same operating principle as a straight separator: the difference is only in body shape, not in efficiency.

Frequently Asked Questions

Does an angled separator differ in efficiency from a straight one?
No. Deaeration efficiency is determined by the chamber size and the coalescent insert area — not by the connection orientation. The angled design delivers the same quality of microbubble removal as the straight DN20 counterpart.

When is it better to choose an angled rather than a straight separator?
When there is no free straight section of sufficient length between the boiler and the nearest pipe bend for installing a straight separator. Or when space in the cabinet needs to be saved by changing the pipe direction directly at the separator body.