Moisture Requirment for Turbo Intake

[NeilDS]

I am working on a marine diesel application that is using MAN B&W turbochargers. MAN has some pretty strict requirements for the moisture of the intake air. They require 100% of drops > 13 microns and 98% of drops > 5 microns. I am guessing that they are try to keep out salts and contaminants for turbo life but does anyone have a more detailed rational be the requirements? We are trying to get an explanation from MAN.

 

[Turbinator]

It could be due to blade erosion. I've seen photos of comopressor blades that have been worn down due to water injection before the turbo.