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Parts of Main engine fuel oil pump line

Inlet from circulating pump goes to a fuel inlet line with a shock absorber at the end and then to the fuel inlet opening of fuel pump. The return from injector and fuel pump outlet is given to fuel return
valves with non-return valves. Fuel pump return has an orifice pipe and return to an overflow arrangement. The leakage detection tank is for high pressure pipe.

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Why atomisation test should not be done in slide type fuel valves

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