The rotary union for air - vaccum based applications. These are made available by us under the name of R-1300 Rotary Union. These slow speed Single Passage high pressure unions come with rotor supported between iolite bearings as well as radial seals that are backed up by PTFE / leather washer so as to deliver optimum functionality in the given applications. » Media - Air & Hydraulic service » Aluminum housing » Compatible seal combinations » Double Oil Impregnated bearings