The seal between the flanges is made by an O-ring. For ease of assembly, this self-centring ring helps with the exact positioning and precise compression of the O-ring ensuring accurate connection, when hand tightening the locking rings.

Small Flange Pipe Connections are used in vacuum and high-vacuum ­applications for 10-7 mbar with the use of soft seals and 10-9 mbar for metal seals.

The typical scope of application for Small Flange Pipe Connections is mainly in semiconductor, coating, chemical, aerospace engineering, medical and food ­industries as well as in research and development.