Patent ID: 8221095

Claim:
A method for protection of compressor modules against undesirable influx of contaminated gas, comprising a pressure housing ( 3 ) which by means of one of more sealing elements ( 4 ) is generally divided into a first compartment ( 8 ) equipped with a compressor ( 2 ) and a second compartment ( 7 ) equipped with a gas-filled motor ( 1 ), the compressor and the motor being drivably connected to each other by at least one shaft ( 9 ), characterised in protecting the second compartment ( 7 ) with motor ( 1 ) against direct influx of contaminated gas from the first compartment ( 8 ) with compressor ( 2 ) by means of compressed gas that is supplied from a withdrawal point ( 13 ) at the first or intermediate stage of the compressor, or from the compressor outlet ( 16 ), and introducing the compressed gas directly into the seal ( 4 ) or in between two or more seals so as to flow through the at least one seal ( 4 ) back to the first compartment ( 8 ) with compressor ( 2 ).