Question: A brass ball valve is installed in a 1 - inch natural gas pipeline made of carbon steel. The system is operating at a pressure

A brass ball valve is installed in a 1-inch natural gas pipeline made of carbon steel. The system is operating at a pressure of 25 PSI. The valve is to be motorized, requiring the calculation of torque to select an appropriate actuator. Determine:
1) The breaking torques required to open and close the valve
2) The running torque required to sustain the valves movement.
NB: Give your answers in SI units.

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