Leakage control of the moving O-ring seal of Arc Valves

For maxiumum product safety of sensitive media


For maxiumum product safety LIAG® free flow arc valves are available with a leakage monitoring system of the only dynamic O-ring. This specific design identifies possibile wearing defects of the seal and prevents any contamination from the outside environment.

The special designed leakage chamber can act as a steam barrier or offer monitoring via means of a level conductor control (dilution of glycerine).

The pivoting axle is supported with a ball-bearing shaft for increased stability and less required operating torque compared with the standard arc valve.


  • Maxiumum product safety for aseptic processes
  • No contamination from the outside environment by as a result of excessive wearing or a defective stem O-ring seal
  • Quick acting valve due to low operating torque requirements (ball-bearing supported main shaft)
  • Able to be retrofit to arc valves
  • 1,5"– 3"