AGG Oxysteer electric booster pump is used for pumping 100% pure oxygen. It allows users to fill oxygen cylinders to 310 Bar from a low-pressure supply cylinder. Due to its innovative seal design and cooling method, Oxysteer fill oxygen cylinders to near ambient temperature. Our boosters also operate at a very low 77dBA noise level. Oxysteer is completely oil-free and use only two low friction dry seals. The seals can be replaced in about 20 minutes by anyone, with only a few tools. The piston guide is the only other part that requires regular maintenance. This is done by simply sliding it off the piston.