Absorption-type odorizing systems are employed in small and large-sized stations with flow rates up to 100 000 Sm3/h / 3 531 000 SCFH. However, they are used as stand-by and emergency systems in all injection-type odorizing installations. For the proper operation it is necessary to reach a differential pressure. OL Series is in conformity with the Pressure Equipment DirectivePED 2014/68-UE and is classified in Max. Category IV