The check valves are designed to be installed on refrigeration and air-conditioning systems for domestic and industrial
use. It’s possible to use them with all the refrigerant fluids of group II (as defined in Article 13, chapter 1, Point b of Directive
2014/68/EU, with reference to EC Regulation No.1272/2008) and they are defined as “pressure equipments”, as described in
Directive 2014/68/UE, Art.2 point 5 and Art.4 point 1.C.