Caleffi DISCAL® 551054A Air Separator, 2 in Nominal, C Connection, 150 psi Working, 32 to 250 deg F, Brass

CAL551054A MFG #: 551054A
  • Connection Type: C
  • Dimensions: 6-1/8 in W x 8-1/4 in H
  • Manufacturer Name: Caleffi
  • Material: Brass
  • Nominal Size: 2 in
  • Series: 551
  • Suitable Media: Water/Glycol Solution
  • Temperature Rating: 32 to 250 deg F
  • Working Pressure: 150 psi
  • Features and More


  • Anti-rotation/anti-vibration pinned float - Creates space between float and air vent wall to prevent float hang-up from debris or variations in separator installation orientation
  • Large-diameter chamber - Slows fluid flow dramatically, combines with concentric, sharp-edged mesh design to cause micro-bubbles to efficiently collect and coalesce, highly effective automatic air elimination
  • Anti-corrosion coalescing mesh - Constructed of glass-filled nylon, more resistant to dissolved oxygen and acidic fluids than plated metals
  • Robust stainless steel float linkages - Reliable float alignment even during turbulent conditions such as filling from bottom
  • Corrosion resistant - All components highly resistant to hydronic chemical additives or unstable pH fluid
  • Air separator with 1/2 in check valve to mount expansion tank on bottom thread
  • Stainless steel float guide pin and linkage
  • Glass reinforced nylon internal element


  • For used to continuously remove the air contained in hydronic circuits of heating and cooling systems


  • ANAB Accredited ISO 9001
  • BSI FM 21654
  • ICIM UNI EN ISO 9001:2008