DG 50 INERT Z22 H RC is an Industrial Vacuum suitable for Combustible Metal Dust Applications.nThe unit is ATEX Certified and rated for Zone 22, 230V 3PH 60Hz, 6.2-HP.nThe dust is vacuumed through the 80mm inlet (3 in.) and discharged inside the 7-gallon oil capacity, 3-gallon dry capacity tank.nThe filter unit is made of a Polyester Antistatic Class M Star filter with integrated filter shaker.nThe system is upgraded with H14 HEPA filter & Remote Control switch, which allows the control of the vacuum from a remote place, convenient when vacuum and user are in different areas.