I forget now which liquefier we bought when we moved from Eynsham to Tubney. But it was big. Because this was cryogenic systems manufacture on a large scale we had to deal with a serious amount of helium. Every magnet could take typically 5 (and sometimes many more) training quenches. And because these were in less than efficient test cryostats, each quench took at least 100 litres of helium (for cool down and reservoir). So 500 liters plus per magnet, at a production of one a day or thereabouts. Not counting all the other systems (variable temperature inserts, He3 and dilution fridges). So a daily use of 600-700 litres was typical, which had to be compressed and stored (two monster pressure tanks outside), and then liquefied 24/7.