Hydraulic Protection

Hydraulic Protection E-HS 300 –20/+60 bar

Protection of digestion towers and similar plants from over and underpressure with the help of a hydraulic seal

operational area | usage

Digester gas recovery/gas cleaning in:

  • Wastewater treatment plants with sludge recovery / digestion towers
  • Biogas plants
  • Industrial plants

product description

The hydraulic protection is installed in the gas dome or directly in a wall penetration. The hydraulic seal in a stainless steel vessel separates the gas chamber from the atmosphere. The hydraulic seal is monitored by a probe and responds to low water level. This monitoring enables automatic water feeding. By varying the pipe diameters and lengths, almost any under and overpressures can be implemented for the gas breakthrough.

constructional features

  • Flange-mounting of 3 stainless steel bodies on the digestion tower in the area of the gas dome or directly in a masonry wall penetration
  • Automatic monitoring by rod probe
  • Automatic feeding possible
  • Hydraulic protection possible in ranges from –100 to +100 mbar
  • Outside diameters from 150 to 1,000 mm possible


  • Compact, simple and functionally reliable design
  • No frost risk
  • Automatic monitoring and feeding possible
  • Different pressure ranges can be implemented
  • Size individually adaptable to existing situation


Datasheet Hydraulic Protection

contact person

Holger Wünsch
Product manager


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