A control valve is used to regulate the flow of sulphuric acid with density of 1830kg/m³. The valve is an equal percentage valve, air to open (ATO) type with a constant pressure drop. The valve position is 0.75 and maximum flow coefficient is 1000 gpm/vpsi. The inlet pressure is 115 psig and the outlet pressure is 70 psig. Rangeability is 50. a) Calculate the flow coefficient for the valve. b) Calculate the valve gain in gpm/%CO assuming that the valve is equal percentage with constant pressure drop. c) Illustrate the transfer function of the valve in b) in term of block diagram if the time constant of valve actuator is 10s.

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