The Caleffi NA546300A is a DISCALDIRT air & dirt separator with 12" ANSI Flange connections. It is installed in the circuit to remove entrained air and dirt before it reaches pumps, control valves and heat exchangers.
Best for combined air and dirt removal in a single body.
Specifications sourced from Caleffi North America technical literature. Last reviewed July 2026.
Key Features
Coalescing Air Separation
An internal medium coalesces microbubbles out of the flow stream and routes them to an automatic vent, removing air that a point vent alone will not capture.
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.
Construction
Body material: Steel.
Rated Operating Envelope
Maximum operating pressure 150 psi, medium temperature range 32 - 270 °F.
Technical Specifications
| Function | Air and dirt separation |
| Series | Caleffi DISCALDIRT |
| Connection | 12 in ANSI flanged |
| Body material | Steel |
| Maximum operating pressure | 150 psi |
| Medium temperature range | 32 - 270 °F |
| Suitable fluids | Water, glycol solution (max 50% glycol) |
| Shipping Weight | 375.0 lb |
Documentation
Design Resources
Related Products
- Caleffi 546016A : DISCALDIRT Air & Dirt Separator 1" NPT Threaded
- Caleffi 546096A : DISCALDIRT Air & Dirt Separator 1" Sweat
- Caleffi 546097A : DISCALDIRT Air & Dirt Separator 1-1/4" Sweat
- Caleffi 546050A : DISCALDIRT Air & Dirt Separator 2" ANSI Flange
Frequently Asked Questions
What does Caleffi NA546300A do?
Caleffi NA546300A is an air & dirt separator in the Caleffi DISCALDIRT range. It removes air and dirt from the circulating fluid, protecting pumps, valves and heat exchangers.
What connection does Caleffi NA546300A use?
It is supplied with 12" ANSI Flange connections. Other sizes and connection styles in the DISCALDIRT range are listed under Related Products.
What are the pressure and temperature limits of Caleffi NA546300A?
Maximum operating pressure is 150 psi, over a medium temperature range of 32 - 270 °F.
What is the warranty on Caleffi NA546300A?
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:
- Air & Dirt Separator
- Series:
- DISCALDIRT
- Connection Type:
- ANSI Flange
- Connection Size:
- 12 in
- Max Operating Pressure:
- 150 psi
- Medium Temperature Range:
- 32 - 270 deg F
- Body Material:
- Steel
