Expansion Tanks
Expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A properly sized tank will accommodate the expansion of the system fluid during the heating or cooling cycle without allowing the system to exceed critical pressure limits. The expansion tank uses compressed air to maintain system pressures by accepting and expelling the changing volume of water as it heats and cools.

Air Separator
Air Separator is used to remove dissolved air/gases or micro bubbles from closed or open Hydronic, HVAC, boiler other water / fluid systems. In the process it separates undissolved impurities as well.
M.S. construction, with flanged connections, the air separator is provided with a high capacity automatic air vent at the top.