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The Computer Controlled Piston Pump Bench, "PBRC", is a bench-top unit that consists of a piston pump, a feed tank, flow meter tank calibrated for taking flow measurements, circulation pipes, manual valves and a solenoid valve, computer controlled, as well as the enough control elements for the pump experiments: two pressure sensors and two level switches. A frequency inverter for the pump, computer controlled, provides the possibility of regulation and measuring the pump motor speed, as well as the measurement of the torque transferred. The pump is installed in a pipes system which avoids the permanent water spending during the operation because it is a closed circuit. The Computer Controlled Piston Pump Bench, "PBRC", unit has instrumentation and sensors to allow the measurement, from the computer, of most representative parameters of the piston pump: The software allows to calculate, with the measurement of the parameters: The unit includes the typical items a piston pump should have, such as: relief valve and damping chamber. So one of the most important objetives of this unit is to study the influence that the presence of the damping chamber has. The flow meter tank has