STEP AS 1907399 - Caterpillar

There are three methods of providing clean air to the Tu-Flo 550 compressor;1. Naturally aspirated - Compressor utilizes its own attached air strainer (polyurethane sponge or pleated paper dry element).2. Naturally aspirated - Compressor inlet is connected to the engine air cleaner or the vacuum side (engine air cleaner) of the supercharger or turbocharger.3. Pressurized induction - Compressor inlet is connected to the pressure side of the supercharger or turbocharger. Refer to the Tu-Flo 550 Specifications section for specific requirements for numbers 2 and 3 above.If a previously naturally aspirated compressor is being turbocharged, it is recommended that the inlet cavity screen be installed with an inlet gasket on both sides of the screen.Compressor Turbocharging Parameters
Air entering the compressor inlet during the loaded cycle must not exceed 121°C (250°F). A metal inlet line is suggested to help meet this parameter.The following compressor crankshaft rotation speed and inlet pressure relationships may not be exceeded.
Fig 9 Turbo Limits Curve