Caleffi Discal 1.25 NPT High-Efficiency Air Separator
Caleffi Discal 1.25 NPT High-Efficiency Air Separator
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The Caleffi Discal 1.25 NPT High-Efficiency Air Separator (551007A) is a high-performance system component engineered to deliver premium fluid distribution efficiency and reliability. Built with a heavy-duty brass housing, this unit provides exceptional durability and outstanding resistance to demanding system environments. Its low-maintenance, high-performance architecture makes it an ideal solution for hydronic heating and cooling configurations.
Engineered to continuously clear entrained micro-bubbles down to a macroscopic level, the DISCAL 551 series purges accumulated system air with minimal head loss across the circuit layout. Inside the primary chamber, an advanced glass-reinforced nylon internal element coalescing assembly slows internal flow velocity, forcing hidden micro-bubbles to aggregate, float upward, and automatically escape via its high-capacity automatic atmospheric air vent structure. This full de-aeration cycle dramatically mitigates ongoing line chatter noise, stops oxygen-driven localized pipe corrosion, eliminates cavitation damage inside commercial circulator assemblies, and lowers recurring call-backs.
| Manufacturer Part Number (MPN) | 551007A (DISCAL Series) |
| Nominal Connection Size | 1-1/4" Female NPT Threaded Connections (FNPT x FNPT) |
| Operating Performance Ratings | 150 PSI Max Working Pressure @ 32–250°F Fluid Temperature Range |
| Internal Coalescing Trim | Glass-Reinforced Nylon PA66GF30 Element with Stainless Steel Vent Linkages |
| Fluid / Medium Suitability | Water or Glycol Closed Solutions (Up to 50% Maximum Concentration) |
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