Air Separator FLAMCO 28020 absorbent 3/4" for hydronic heating and cooling systems

FLAMCO 28020 is an absorbent air separator with 3/4" connections designed for hydronic heating and cooling systems. It removes entrained air and microbubbles from closed-loop circuits to improve heat transfer efficiency, reduce system noise and decrease corrosion risk. The unit fits residential and light commercial installations where continuous deaeration and quiet operation are required.

Advantages

The FLAMCO 28020 combines a compact body with internal absorbent media to capture and retain air particles and microbubbles without interrupting flow. By continuously separating air, it helps maintain pump performance and reduces the formation of air-related faults. Installation with standard 3/4" connections simplifies integration into existing piping, and the design minimizes maintenance frequency by concentrating separated air for manual or automatic venting.

Suitable for

• Residential hydronic heating systems (radiators, underfloor heating)
• Light commercial heating and cooling circuits
• Closed-loop chilled water systems and fan coil units
• Systems where reduction of noise, corrosion and pump cavitation is needed

When it may not be suitable

This air separator is intended for closed hydronic circuits and may not be appropriate for large industrial systems with very high flow rates or systems that require integrated automatic venting and advanced filtration. It should not be relied on as the sole solution for systems with significant contamination or where a combined dirt separator and air separator is specifically required.

Key specifications

• Connection size: 3/4" (female threaded)
• Function: absorbent air separation for hydronic systems
• Application: closed-loop heating and cooling circuits
• Material: corrosion-resistant body with internal absorbent media
• Mounting: in-line installation on supply or return pipework

How to use

Install the FLAMCO 28020 in a vertical orientation on the system supply or return line at a location where flow is steady and air tends to accumulate, such as near boilers, pumps or high points. Ensure correct sealing of the 3/4" threaded connections and flush the system before commissioning to remove debris. After installation, periodically check the venting point and remove collected air either manually or via a compatible automatic venting valve. Follow local plumbing codes and the system manufacturer's instructions during installation and servicing.

What to consider before purchase

• Compatibility with existing 3/4" piping and thread type
• Flow rates and pipework layout to ensure effective air capture
• Whether combined air and dirt separation is needed for the system
• Access for maintenance and venting after installation

Usage recommendations

Position the separator where air naturally accumulates and pair it with routine system flushing and a suitable venting device. Regular inspection and periodic venting will preserve system efficiency, reduce noise and lower corrosion risk in hydronic heating and cooling installations.