Unit weight: 2 to 120 kg
Heat-resistant steel casting, nickel-base alloys
Diameter: 200 to 1000 mm
Dimensional tolerance up to D3 (VDG information sheet P 690)
Wolfensberger developed special pattern facilities that can be combined. The flow diameter of the nozzles machined ready for assembly is measured with a computer-controlled test system and logged. Tolerances are called for here in excess of the D3 degree of accuracy required for investment casting in compliance with VDG specification P 690. Unlike the previous welded construction, Exacast© ceramic precision casting means less rejects because of a lower likelihood of cracking, as well as higher strength and resistance to wear. At the moment, ABB Turbo Systems takes delivery of over 12,000 nozzles in 300 variations annually.