Dealing with BOC Medical in one of my other roles what information you get depends on what is being set up. With cylinder rental alone you normally have to ask for all the various data sheets & guides (which incidentally are very good and they readily provide the info on request). Where a complete set of equipment, such as the BOC Lifeline which is a complete package of cylinder, carrying bag and all the associated delivery equipment, is provided it normally comes with full documentation & user guides, signage, etc and the delivery drivers for this service are trained in giving basic on site induction into the equipment to customers.
The cylinders that would normally be supplied for the usage hinted at would be domicilliary cylinders where the regulator only has a 2 litre per minute and a 4 litre per minute setting (normal ones can kick out up to 15lpm or a 25lpm purge) with the regulator head being part of the cylinder (rather than the old method of a separate cylinder & regulator with the risk of high flow high pressure leakage).
In use normally a concentration of 24%-28% Oxygen would be being delivered to the patient at 2 or 4lpm over a period of time, usually several hours, the person being a sufferer of a chronic obstructive pulmonary disease.
All BOC's safety documentation is also freely available from the BOC Medical website. Normally as a supplier their responsibility ends at the point of delivery and handover, the use being responsible for ongoing safe use.