Caleffi 551028A DISCAL Air Separator 1" Sweat Connection

The Caleffi 551028A DISCAL air separator is a high-performance hydronic system component designed to continuously remove air from heating and cooling system circuits. This brass-bodied unit features advanced coalescing technology that effectively eliminates air down to the micro-bubble level, ensuring optimal system performance and longevity.

Key Features:

• 1-inch sweat connections with 1/2-inch FNPT bottom thread for air discharge
• Brass construction with stainless steel float guide pin and linkage for corrosion resistance
• Concentric diamond pattern mesh coalescing element creates whirling action to capture micro-bubbles
• Float-operated automatic air release valve for continuous venting
• Bidirectional flow capability for flexible installation
• Up to 100% air separation efficiency with minimal head loss
• Maximum flow rate of 9.3 GPM with CV value of 32.5
• Operating pressure up to 150 PSI
• Temperature range: 32°F to 250°F
• Glass-reinforced nylon internal element with EPDM seals

By removing dissolved oxygen and other gases from hydronic systems, the DISCAL 551028A prevents corrosion, sediment formation, noise, and mechanical damage. The circulation of fully de-aerated water allows boilers, pumps, and heat exchangers to operate under peak conditions with extended service life. Suitable for use with water and water/glycol solutions in residential and commercial HVAC applications.