Main design features:
 One piece compressor wheel with spatially bent blades milled from high-tensile aluminium alloy material.
 The axial-flow turbine wheel is friction-welded to the rotor shaft which is short, achieving high rigidity and low mass. 
 Short bearing distance facilitating the precise rotor alignment.
 Single-walled, uncooled casings of waterless design minimizing corrosion of the turbine casing (no washing in HFO operation) and dissipation of process heat. As a result, no cooling water system is used and the casings are light.

NA TURBOCHARGERS:

• NA 34/S
• NA 40/S
• NA 48/S
• NA 57/T9
• NA 70/T9

Main benefits:
 Operational flexibility supporting both heavy and diesel fuel oil engine operation because of the high thermal tolerance.
 Compact, light and plain design facilitating the attachment to the engine and maintenance because of the few main components and promising increased operational reliability.
 Cost-effective supporting a wide output range with low operating costs and long service life.