Assembling 24° sealing cone screw-on fittings (AOL/AOS)

  • Lightly oil the cone of the screw sleeve and the thread of the union nut.
  • Place screw fitting (sealing cone) evenly on the threaded connection.
  • Thread the union nut of the sealing cone screw-on fitting onto the screw fitting until the force required to turn it* increases noticeably.
  • Turn the union nut of the sealing cone screw-on fitting or pipe about 30° to 60° but no more than 1/4 turn further with the spanner (tighten/tighten fully).

* Definition of „noticeably increased force“:
Tighten the union nut until the point at which it becomes noticeably more difficult to turn the union nut. At this point, for example, minor damage on the thread caused by the union nut getting caught must be overcome.
With sealing cone screw-on fittings with O-Ring (AOL / AOS), the pre-stressing of the O-Ring must be bridged and the sealing cone must lie metallically flush against the cone of the HL/HS connector
.