Menetelmä keskipakopumppu-tyhjöpumppu-kombinaation toiminnan säätämiseksi ja kaasua erottava keskipakopumppu

摘要

The present invention relates to a method for controlling the functioning of a combined centrifugal pump and a vacuum pump, and to a gas-separating centrifugal pump. The method according to the invention is characterised in that the gas flow in the gas evacuation duct between the centrifugal pump and the vacuum pump is controlled by means of a flow-restricting element arranged in the said gas evacuation outlet duct 26. <IMAGE>