ALFRA Rotabest Vacuum Attachment Vacubest ALFRA Rotabest Vacuum Attachment " Vacubest" Ï This attachment permits the use of our core drilling machines with all their advantages on non-magnetic, dense, level surfaces such as aluminium, copper, brass, chrome-nickel steel ( INOX, V2A, V4A) and plastics Ï The surface must be clean and even, slight traces of dirt within the twin chambers are acceptable. This has proved to be satisfactory in : Ï Aircraft construction Ï Truck body construction Ï Bus construction Ï Shipbuilding Ï Tank construction in the chemical industry ( Especially chrome-nickel steels) Extent of delivery Ï Alfra vacuum pump 230 V, 50 Hz in case. Ï Water trap with filter and water tap Ï Quick coupling Ï Twin chamber plate with hose connection, nipple and vacuum hose 3 m with filter Capacity Vacuum capacity : 1.5 m3/ h - 25 l/ min Max. Vacuum : 200 mbar ( abs) Overpressure : 300 mbar Dimensions of twin : 400 x 200 mm Order # : 230.07.012