Top level Axial flow NA70/T Nozzle Ring for aftermarket turbocharger kits

Features of / NA series marine turbocharger:

• NA 70/T nozzle ring is one of the parts for  exhaust gas turbochargers and which were developed comparatively simply with a cast axial turbine
• For engine power output range from 1,650 to 24,500 kW per turbocharger;
• Axial flow turbine inboard plain bearing design;
• Lubricated by the engines lube oil system;
• Suitable for a wide variety of fuels, heavy fuel, diesel oil, biofuel and gas operation;
• Simple and durable design;
• Easy maintenance；
• Long service life；

Types of / NA series marine turbocharger:

More picture of / NA70 Nozzle Ring

The function of turbocharger nozzle ring:

The turbine is driven by the engine exhaust gas, which enters via the gas inlet casing. The gas expands through a nozzle ring where the pressure energy of the gas is converted to kinetic energy. This high velocity gas is directed onto the turbine blades where it drives the turbine wheel, and thus the compressor at high speeds (10 -15000 rpm). The exhaust gas then passes through the outlet casing to the exhaust uptakes.

The nozzle ring need to bear the extremely high temperature and high pressure, so it's very crucial for its material selection.

The turbocharger nozzle ring is usually fabricated from a creep resistant chromium nickel alloy, heat resisting moly-chrome nickel steel or a nimonic alloy.