THE MILLER MWK-S IS A MOBILE, HIGH-VOLUME WELD FUME COLLECTOR DESIGNED TO CAPTURE AIRBORNE WELD FUME PARTICLES AT THE SOURCE USING A HIGH-EFFICIENCY, NANOFIBER-MEDIA CARTRIDGE FILTER. THE UNIT OPERATES ON 115 VOLTS AC INPUT POWER AT 11.9 A, DELIVERED VIA A 20 FT (6.1 M) POWER CORD. IT FEATURES A 1 HP THERMALLY PROTECTED MOTOR AND ACHIEVES A NOMINAL AIR FLOW OF 875 CFM (413 LITER/SEC). THE FILTER AREA IS 490 FT2 (45.5 M2). THE FUME EXTRACTOR HAS A SOUND LEVEL OF 71.2 DBA, AMCA TESTED AT 5 FT (1.5 M), AND WEIGHS 238 LB (108 KG). THE UNIT INCLUDES AN SA-812 EXTRACTION ARM WITH AN ARM REACH OF 12 FT (3.7 M) AND AN ARM DIAMETER OF 8 IN. (200 MM). FUMES ARE FILTERED THROUGH A MESH OUTLET SCREEN (SPARK ARRESTOR) BEFORE PASSING THROUGH THE MAIN FILTER. THE SYSTEM INCLUDES A SEMI-AUTOMATIC FILTER CLEANING FUNCTION THAT USES COMPRESSED AIR TO REMOVE PARTICLES, WHICH THEN FALL INTO A COLLECTION TRAY. CLEAN AIR IS RE-CIRCULATED BACK TO THE WORK AREA.