Sealing arrangement

A sealing method of a sliding vane machine used as a compressor, expander or pump for sealing between a rotating plane surface on a rotor of said sliding vane machine and a machine housing to prevent flow of process fluid between an internal volume to an external volume of said sliding vane machine, said machine housing comprising a seal pocket located at a housing end and said seal pocket opens towards the direction of the external volume and the internal volume, the sealing method comprising:

• mounting a sealing assembly in said seal pocket, by arranging sealing bearing ring between a piston arrangement and said rotating plane surface,
• supplying a fluid through a supply line for a pressurized lubrication fluid through said machine housing to a piston cavity, and to piston fluid channels in said piston arrangement and further to lubrication conduits through said sealing bearing ring corresponding with said piston fluid channels,
• at least partially restricting, by means of flow restrictors, fluid flow through the piston fluid channels,
• pressurizing said lubrication fluid, thus
• forcing said piston arrangement against said sealing bearing ring and thus
• forcing said sealing bearing ring against said rotating plane surface and thus
• sealing between said rotating plane surface on said rotor and said machine housing.