Fig. 7: Media distributor with He return and N2 supply
Gaseous nitrogen
A high purity gas system has been installed to feed all experimental hutches and about half of the lab rooms with gaseous nitrogen. The nitrogen gas is coming form the two liquid nitrogen storage vessels. The purity of the gas is better than 5.6 (impurities < 4 ppm) and the pressure is at most 0.5 bar. The main purpose is to flush vacuum vessels.
The gas is made available at the media distributor (see Fig. 7). A Swagelok connector SS-QC6 for 10 mm tubes has to be used.
Helium return system
A system to collect gaseous Helium has been installed which is available in the following experimental hutches:
47c (MvL): P01 ( EH1, EH2, EH3), P02 (EH1, EH2), P04; P07 (EH2), P09 (EH1, EH2, EH3), P10 (EH1, EH2), P11 (EH). in hall columns #7 and #13.
48f: P21 (EH1, EH2, EH3, outside of CH1), P22, P23.1 (EH, outside of EH), P23.2, P24 (EH1, EH2), P25, truck store area technical hall service.
46g: P66
Again, the return pipe is available at the media distributor (see Fig. 7). A standard flange KF25 has to be used. A non-return flap is installed opening at a pressure of 3-5 mbar.
