DILO sealing prinicple

In use for decades

DILO couplings allow a connection to be made by simply screwing the two coupling parts together. Before the metal to metal seal closes the pressure and vacuum tight coupling is sealed inside by means of an O-ring. When loosening the coupling parts again, the same O-ring prevents gas loss whilst the self seal valves close.

Advantages of application

  • Self-closing coupling system
  • Pressure and vacuum-tight even when coupling and uncoupling
  • Permanent tightness even when frequently connected and disconnected
  • Applicable up to PN 64 bar
  • Suitable for temperatures from -40 °C to +80 °C
  • Direct connection to DILO service carts without adapter
  • Available in different materials even for outdoor switchgear


Approvals and certifications provided by DILO

  • Certification according to ISO 9001:2008
  • HP0 approval as pressure equipment manufacturer
  • Production control in accordance with 2014/68/EU regulations