Caleffi 551067A DISCAL Air Separator 1-1/4 Inch Press Connection

The Caleffi 551067A DISCAL Air Separator is a high-performance component designed to continuously remove air from hydronic heating and cooling systems. This 1-1/4 inch press connection model features an exceptionally high air discharge capacity, automatically eliminating all air present in the system down to micro-bubble level.

Key Features:

• Integral press connections for quick, reliable installation
• Bi-directional flow capability - allows flow in either direction
• Brass construction with glass-filled nylon coalescing mesh resistant to dissolved oxygen and acidic fluids
• Anti-rotation/anti-vibration pinned float design prevents float hang-up from debris
• Stainless steel float guide pin and linkage for reliable performance during turbulent conditions
• Large-diameter chamber dramatically slows fluid flow for efficient micro-bubble collection
• 1/2 inch FNPT bottom thread for optional expansion tank connection
• Maximum working pressure: 150 PSI
• Temperature range: 32°F to 250°F
• Suitable for water and glycol solutions

The special internal shape of the separator body ensures low head loss while effectively removing air. As micro-bubbles fuse together, they increase in volume until large enough to rise to the top for automatic release. The circulation of fully de-aerated water enables equipment to operate under optimum conditions, free from noise, corrosion, localized overheating, or mechanical damage.

Note: Not for use in potable water plumbing applications as it does not conform with low-lead plumbing requirements.