Caleffi DISCAL® 551005A Air Separator, 3/4 in Nominal, FNPT Connection, 150 psi Working, 32 to 250 deg F, Brass

CAL551005A MFG #: 551005A
  • Connection Type: FNPT
  • Dimensions: 4-5/16 in W x 7-1/2 in H
  • Manufacturer Name: Caleffi
  • Material: Brass
  • Nominal Size: 3/4 in
  • Series: 551
  • Suitable Media: Water/Glycol Solution
  • Temperature Rating: 32 to 250 deg F
  • Working Pressure: 150 psi
  • Features and More


  • Air separators are used to continuously remove the air contained in the hydronic circuits of heating and cooling systems
  • The air discharge capacity of these devices is very high
  • They are capable of removing automatically all the air present in the system down to the micro-bubble level
  • The circulation of fully de-aerated water enables the equipment to operate under optimum conditions, free from noise, corrosion, localized or mechanical damage
  • Micro-bubbles, fusing with each other, increase in volume (get larger) until they become large enough to rise to the top where they are automatically released
  • Stainless steel float guide pin and linkage
  • 1/2 in FNPT bottom thread
  • Glass reinforced nylon internal element
  • Up to 100% removal air separation efficiency


  • For Heating and Cooling Systems


  • Limited