Check valves are primarily used to fully close the passage of a circulating (gaseous or fluid) medium in one direction and to simultaneously allow free passage in the other direction. As two-port valves, they feature two openings in the body, one by which the fluid can enter, and one by which it can leave.
FACTS CHECK VALVES
Threaded, flanged or closable check valves designs
Depending on the check valve design: suitable for water, non-aggressive liquids and gases, steam, condensate
Depending on the check valve: universal, horizontal or vertical mounting