The flanged pressure reducing valves of the 5 series have inlet pressure compensation and exchangeable valve seats; in the smaller models (up to DN32) the complete regulator part is exchangeable as a cartridge. They are preferably used to reduce the pressure of water and other neutral, non-adhesive liquids. If particularly high flow rates are required, they can also be used for compressed air, nitrogen and other neutral, non-flammable gases.

The flange connections comply with DIN EN 1092 PN25. In contrast to the predecessor model (DRV 411/412/413/414), all overall lengths comply with DIN EN 558-1. Of course, the overall lengths of the predecessor model can still be supplied on request.