Caleffi 5453 / 5457 DIRTMAG composite magnetic dirt separator

DIRTMAG 5453 and DIRTMAGPRO 5457 are technopolymer magnetic dirt separators that collect sand, sludge and magnetite circulating in closed heating and cooling systems. There are 16 models in standard, ball valve, filter and double-magnet versions.

Make a quote with this series Compare models

Caleffi 5453 / 5457 DIRTMAG composite magnetic dirt separator

Body: Technopolymer (composite)
Max. working pressure: 3 bar
Temperature range: 0–90 °C
Connections: Female; 5457 also with Ø 22 and Ø 28 compression

Models (16)

Code	Model	Version	Connection	Max. flow	Installation
545305	DIRTMAG 5453	Standard	3/4" female	–	Horizontal / vertical
545306	DIRTMAG 5453	Standard	1" female	–	Horizontal / vertical
545307	DIRTMAG 5453	Standard	1 1/4" female	–	Horizontal / vertical
545308	DIRTMAG 5453	Standard	1 1/2" female	4.3 m³/h	Horizontal / vertical
545309	DIRTMAG 5453	Standard	2" female	6 m³/h	Horizontal / vertical
545345	DIRTMAG 5453	With ball valves	3/4" female	–	Horizontal / vertical / 45°
545346	DIRTMAG 5453	With ball valves	1" female	–	Horizontal / vertical / 45°
545347	DIRTMAG 5453	With ball valves	1 1/4" female	–	Horizontal / vertical / 45°
545375	DIRTMAG 5453	With filters and shut-off valves	3/4" female	–	Horizontal / vertical / 45°
545376	DIRTMAG 5453	With filters and shut-off valves	1" female	–	Horizontal / vertical / 45°
545377	DIRTMAG 5453	With filters and shut-off valves	1 1/4" female	–	Horizontal / vertical / 45°
545705	DIRTMAGPRO 5457	Double magnet	3/4" female	1.6 m³/h	Horizontal / vertical
545706	DIRTMAGPRO 5457	Double magnet	1" female	1.8 m³/h	Horizontal / vertical
545707	DIRTMAGPRO 5457	Double magnet	1 1/4" female	2.6 m³/h	Horizontal / vertical
545702	DIRTMAGPRO 5457	Double magnet, compression	Ø 22	1.6 m³/h	Horizontal / vertical
545703	DIRTMAGPRO 5457	Double magnet, compression	Ø 28	1.8 m³/h	Horizontal / vertical

Series specifications

Body	Technopolymer (composite)
Max. working pressure	3 bar
Temperature range	0–90 °C
Connections	Female; 5457 also with Ø 22 and Ø 28 compression
Drain	Drain cock with hose connection
Installation	Horizontal and vertical; valve and filter models also at 45°
Technical brochure	5453: 01240, 5457: 01388

Accessories

Code	Product	Use
CBN545305	Insulation for 5453/5457	For 545305, 545306, 545705, 545706, 545702, 545703
CBN545307	Insulation for 5453	For 545307
CBN545308	Insulation for 5453	For 545308
CBN545309	Insulation for 5453	For 545309

Versions

5453 standard (545305–545309): basic model with female connections; the 1 1/2" and 2" sizes, with 4.3 and 6 m³/h max. flow, cover larger circuits.
5453 with ball valves (545345–545347): built-in shut-off valves mean the circuit does not have to be drained for cleaning.
5453 with filters (545375–545377): designed for complete flushing of the circuit to protect the boiler and its components. Two stainless steel mesh filters are supplied: the blue one for initial cleaning is fitted, the grey one for maintenance is in the pack. Brass shut-off valves with nuts are included.
5457 DIRTMAGPRO (545702–545707): magnets in the outer ring plus a quadruple magnet in the centre of the body create a double magnetic field; the large settling chamber lengthens cleaning intervals and it suits flow velocities up to 1.6 m/s.

How to choose

Match the connection size to the boiler return pipe; in copper installations the Ø 22 and Ø 28 compression models of 5457 need no adaptors.
When a new boiler is connected to an old system, choose 545375–545377 with the initial cleaning filter.
In systems that also cool, add the CBN insulation shells as separate lines.

How to write it in a quote

State series, version and size: "Caleffi 545376 DIRTMAG magnetic dirt separator with filter 1", technopolymer body, with shut-off valves, 3 bar". Put the insulation shell (e.g. CBN545305) on its own line; the accessory table shows which shell fits which code.

FAQ

What does a magnetic dirt separator do?

It collects sand, sludge and ferrous magnetite circulating in the system in its settling chamber and around the magnet, protecting the pump, heat exchanger and boiler components from these particles.

What is the difference between DIRTMAG and DIRTMAGPRO?

DIRTMAGPRO 5457 has a quadruple magnet in the centre of the body in addition to the magnets in the outer ring, and a larger settling chamber. It is designed for higher capacities and flow velocities up to 1.6 m/s.

How is the collected dirt drained from DIRTMAGPRO?

Stop the circulation, remove the magnet rod and the magnet ring, then open the drain cock to flush out the dirt. The hose connection lets you lead the water straight to a drain.

Can it be fitted on a vertical pipe?

Yes. All models can be adjusted for horizontal and vertical pipes; the 5453 models with ball valves or filters can also be installed at 45°.