I manage and maintain a helium recovery system for a lab. We have a closed cycle helium recovery system. I give labs liquid helium and they use it and it comes back to the system as gas.
We use liquid helium because of its cold temperatures. Regularly at 4.2k. We recycle helium because its fairly expensive to get and its not a very renewable resource. a big part of my job is to babysit the machines and make sure they are working properly.