DILO Sealing principle

Hermetically sealed and long-term tightness

Tightness is achieved without any intermediate seal compound by direct contact of the tongue and groove seal faces. Two ring-shaped sealing areas with high stability are produced by the different radii of curvature of the tongue and groove. The braking surface on the DILO tongue part prevents the seal area from being deformed. The result: high and long-term tightness.

Features of DILO high pressure tube unions

  • Leak rate ≤ 1x10-8 mbar l/s
  • Suitable for pressures up to 1,000 bar and vacuum
  • Temperature resistant from -270 °C up to +650 °C (dependent on the material used)
  • Applicable for all fluids with the correct steel grade
  • Long term high level of gas tightness even when tube unions are frequently loosened and re-connected
  • Short separation distance required to open a coupling which allows simple assembly and disassembly
  • Resistant to vibrations without any additional protection
  • Complete interchangeability of pieces of the same type