3M SUPPLIED AIR RESPIRATORS REQUIRE A SOURCE OF CLEAN BREATHING AIR SUCH AS PLANT AIR SYSTEMS OR BOTTLED AIR. THIS CLEAN BREATHABLE AIR CAN BE DELIVERED TO HOODS HELMETS FULL FACEPIECES HALF FACEPIECES AND LOOSE-FITTING FACEPIECES. SUPPLIED AIR RESPIRATORS OFFER MANY FEATURES OVER TRADITIONAL RESPIRATORY PROTECTION SUCH AS COOLING OR HEATING INCOMING AIR; FIT TESTING ONLY REQUIRED FOR TIGHT-FITTING FACEPIECES; AND LOW MAINTENANCE. COMPLETE SYSTEMS INCLUDE A SUPPLIED AIR HOSE AN AIR REGULATING VALVE A BREATHING TUBE AND A HELMET HOOD OR OTHER FACEPIECE. POTENTIAL BENEFITS INCLUDE UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" A COST-EFFECTIVE WAY TO PROVIDE A HIGH LEVEL OF RESPIRATORY PROTECTION 3M'S RANGE OF SUPPLIED AIR VALVES CAN COOL OR HEAT AIR BY UP TO 50#176F (28#176C). NO FILTERS CARTRIDGES OR BATTERIES TO MAINTAIN SUPPLIED AIR PROVIDES NO ADDITIONAL BREATHING RESISTANCE TO THE WEARERTHE VORTEX ASSEMBLY CAN COOL COMPRESSED AIR BY AS MUCH AS 50#176(28C). IT CAN OPERATE ON PRESSURES RANGING FROM 60-90 PSIG DEPENDING ON HOSE LENGTH. ASSEMBLY INCLUDES COOLING TUBE WITH QUICK DISCONNECT FITTING WAIST BELT HOLDER #176
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