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The fuel side contains eight valves, and the oxygen side contains four. A pressure loss occurs across each valve. These losses are accounted for when determining tank pressurization. The fuel side consists of redundant solenoid valves downstream of the fuel tank. This way, if one of the valves fails to remain closed before testing or remains open after the test is complete, fuel will still be prevented from flowing through the injector and burning up in the combustion chamber. A check valve is placed upstream of each of the three tanks to ensure that fluid from one tank does not make its way into one of the other tanks. Each propellant line consists of a manual shutoff valve in case the solenoid valves fail when the system is in storage in the days leading up to a test. These valves are opened right before a test begins and are closed after the test is over.
Images
Files
RL-36_Losses_Fuel_to_Injector.m
RL-36_Orifices_Fuel_to_Injector.m