3M™ Versaflo™ Powered Air Respirator Filters, TR-600 & TR-800 Series is our range of filters for use with 3M™ Versaflo™ Powered Air Respirators TR-600 & TR-800 Series and a 3M™ approved headtop or facepiece. Filters are available in a range of options covering particulate only hazards, or for hazards containing a combination of gas, vapour and particulates.