Rotary couplings are self-contained and self-supporting rotary professional seals used to transfer fluids such as steam, water air or oil, to and from rotating machinery.

Standard units are of steel and iron construction with specials available in, for example, stainless steel and nickel alloys for chemically aggresive fluids or food quality applications.

The range of standard models in three basic types for single or dual flow are available with a choice of suppliers of ball bearings for temperatures up to 160 degrees celsius and with plain cylindrical carbon bearings supplier for temperatures of 100 degrees celsius up to 300 degrees celsius. Pressure range is 70 bar with rotational speeds up to 5000 rpm. In many instances it is possible to exceed these conditions after first consulting the Filton technical department for advice.