The Caleffi 551716 is a DISCAL air separator with Caleffi hydronic and a brass body, engineered to continuously remove entrained air from closed-loop hydronic heating and cooling systems down to the micro-bubble level.
Product data compiled from Caleffi North America technical documentation. Last reviewed June 2026.
Key Features
100% Air Removal
Continuously removes entrained air down to the micro-bubble level, restoring thermal output and quiet operation.
Low Head Loss Element
An internal coalescing element merges micro-bubbles with minimal pressure drop.
Bidirectional Flow
Flow is permitted in either direction, simplifying installation on horizontal piping.
Drain Blowdown
An integral drain valve clears separated air and debris without taking the system offline.
Brass Construction
Brass body with stainless and EPDM internal components for hydronic service.
Technical Data
| Function | Air separation |
|---|---|
| Series | Caleffi DISCAL |
| Body material | Brass |
| Maximum operating pressure | 10 bar |
| Maximum air discharge pressure | 10 bar |
| Medium temperature range | 0 - 110 °C |
| Suitable fluids | Water, glycol solution (max 50% glycol) |
| Air separation efficiency | 100% to micro-bubble level |
Documentation
Technical brochureRelated Products
Frequently Asked Questions
It is an air separator that continuously removes air entrained in a closed hydronic loop down to the micro-bubble level, reducing noise, corrosion and circulation problems.
No. This model separates air only. For combined air, dirt and ferrous-particle removal, use a DISCALDIRTMAG model.
10 bar maximum operating pressure with a medium temperature range of 0 - 110 °C.
- Type:
- Air Separator
- Series:
- DISCAL
- Body Material:
- Brass
