Pros, Join Our TradeMaster Program!
The Caleffi HydroCal combination hydraulic, air, and dirt separator is a device that, incorporates high performance air and dirt removal functionality into the hydro separation function which makes the primary and secondary circuits connected to it hydraulically independent, and can be used on hot or chilled water systems. The HydroCal features a proven stainless steel internal element that combines to continuously and automatically eliminate air micro-bubbles with the simultaneous removal of dirt particles as tiny as 5 microns. The air discharge capacity is very high, with the capability of automatically removing all the air present in the system down to the micro-bubble level. The 3 in 1 high performance functionality of the HydroCal saves system installation and maintenance costs as there is no need to include separate air and dirt separators.

  • Epoxy resin coated steel body.
  • Pre-formed insulation on 2"-4" sizes.
  • Stainless steel internal coalescing mesh.
  • Complete with:
    • Automatic air vent (Code 501502A)
    • Air vent shut-off valve (Code NA39589)
    • Drain valve (Code NA39588)
  • ANSI 150 flange connections.
  • Max working pressure: 150 psi
  • Vessel working temp range: 32 - 220F
  • Vessel working temp range without insulation: 32 - 270F
  • Air separation capacity: down to micro-bubble level
  • Particle separation capacity: to 5 um (0.2 mil)
"NA" code prefix indicates ASME tagged and registered with the National Board of Boiler and Pressure Vessel Inspectors. A Manufacturer's Data Report for Pressure Vessels, Form U-1 as required by the provisions of the ASME Boiler and Pressure Vessel Code shall be furnished for each air separator upon request.

Codes with the denotation of CRN indicate that the item is accepted and registered by the Canadian Registration Number (as defined by CSA B51 4.3).
Read more
Hydraulic Separator
Connection Size:
Connection Method:
Connection Type:
Flanged x Flanged
Max Pressure:
150 psi
Max Flow (GPM):
Capacity (Gallons):
Speak with a real person who will go out of their way to help!
Closed Now: Phone Hours
Monday – Thursday
8am–7:45pm ET
8:30am–7:45pm ET

1 Video

    Product Reviews

    Product Q&A

    Add-on Item

    This item is cost-prohibitive to ship on its own but is available to ship with orders over $200.

    Why don't we show the price of this item?

    We try to always offer you the lowest prices possible, but some manufacturers require that we only show these low prices once you take further action.

    To see the price, simply add the item to your cart or sign in.