The Caleffi NA546350A is a DISCALDIRT air & dirt separator with a 14 in ANSI flanged connection and a steel body, engineered to remove both entrained air and suspended dirt from closed-loop hydronic heating and cooling systems.
Product data compiled from Caleffi North America technical documentation. Last reviewed June 2026.
Key Features
Air and Dirt in One
Removes entrained air and separates suspended dirt in a single in-line device.
Micro-Bubble Air Removal
Coalesces and vents air down to the micro-bubble level for quiet, efficient circulation.
Dirt Collection Chamber
Suspended particles settle into a collection chamber and are purged through the drain valve.
Online Blowdown
Captured debris is flushed through the drain valve while the system stays in operation.
14 In Ansi Flanged Connection
14 in ANSI flanged connection sized for the application.
Steel Construction
Steel body with stainless and EPDM internal components for hydronic service.
Technical Data
| Function | Air and dirt separation |
|---|---|
| Series | Caleffi DISCALDIRT |
| Connection | 14 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) |
Documentation
Technical brochureRelated Products
Frequently Asked Questions
It removes both entrained air and suspended dirt from a closed hydronic system in a single in-line device.
No. This is the non-magnetic DISCALDIRT model. The DISCALDIRTMAG version adds rare-earth magnetic capture of ferrous particles.
150 psi maximum operating pressure with a medium temperature range of 32 - 270 °F.
- Type:
- Air & Dirt Separator
- Series:
- DISCALDIRT
- Body Material:
- Steel
- Connection Type:
- ANSI Flange
- Connection Size:
- 14 in
