The Caleffi HydroCal is rated for either hot or chilled water systems and combines high-performance air removal, dirt removal and hydraulic separation in one device. The 3-in-1 functionality minimizes costs for systems requiring primary/secondary piping because there is no need to install separate air separators and/or dirt elimination devices. HydroCal features a proven stainless internal element that continuously and automatically eliminates air and captures dirt. Dirt particles, as small as 5 microns, are separated out and trapped in the bottom of the unit away from flow path. Available in 2” to 8” sizes with ANSI flanges. ASME- and CRN-registered.