The Caleffi 577879A is a 577 XF magnetic dirt separator with 1-1/4" Union connections. It is installed in the circuit to remove dirt and ferrous particulate before it reaches pumps, control valves and heat exchangers.
Best for systems with cast iron or steel components, where ferrous debris would otherwise circulate.
Specifications sourced from Caleffi North America technical literature. Last reviewed July 2026.
Key Features
Low-Velocity Dirt Collection
An enlarged chamber drops fluid velocity so heavier particulate settles into a collection zone that can be flushed without shutting the system down.
Magnetic Ferrous Capture
A Neodymium rare-earth assembly captures ferrous debris that a non-magnetic separator passes straight through, protecting pumps and heat exchangers.
Construction
Body material: Composite.
Rated Operating Envelope
Maximum operating pressure 45 psi, medium temperature range 32 - 195 °F.
Technical Specifications
| Function | Magnetic dirt separation |
| Series | Caleffi 577 XF |
| Connection | 1-1/4 in Sweat Union |
| Body material | Composite |
| Magnet | Neodymium rare-earth |
| Dirt separation | Non-ferrous debris to 5 micron |
| Maximum operating pressure | 45 psi |
| Medium temperature range | 32 - 195 °F |
| Shipping Weight | 4.0 lb |
Documentation
Related Products
- Caleffi 577660A : 577 XF Magnetic Dirt Separator 1" NPT Male Union
- Caleffi 577666A : 577 XF Magnetic Dirt Separator 1" Press Union
- Caleffi 577669A : 577 XF Magnetic Dirt Separator 1" Sweat Union
- Caleffi 577870A : 577 XF Magnetic Dirt Separator 1-1/4" FNPT Union
Frequently Asked Questions
What does Caleffi 577879A do?
Caleffi 577879A is a magnetic dirt separator in the Caleffi 577 XF range. It removes dirt and ferrous debris from the circulating fluid, protecting pumps, valves and heat exchangers.
What connection does Caleffi 577879A use?
It is supplied with 1-1/4" Union connections. Other sizes and connection styles in the 577 XF range are listed under Related Products.
What are the pressure and temperature limits of Caleffi 577879A?
Maximum operating pressure is 45 psi, over a medium temperature range of 32 - 195 °F.
What is the warranty on Caleffi 577879A?
Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship from the date of shipment. ZOT Supply is an authorized Caleffi distributor.
- Product Type:
- Magnetic Dirt Separator
- Series:
- 577 XF
- Connection Type:
- Sweat Union
- Connection Size:
- 1-1/4 in
- Magnet:
- Neodymium rare-earth
- Dirt Separation:
- Non-ferrous debris to 5 micron
- Max Operating Pressure:
- 45 psi
- Medium Temperature Range:
- 32 - 195 deg F
- Body Material:
- Composite/Brass
