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FM21 SERIES AND PARALLEL PUMPS DEMONSTRATION UNIT Centrifugal pumps are often used together to enhance either the flow rate or the delivery pressure beyond that available from a single pump. The unit is designed to demonstrate the operational advantages of parallel or series operation, depending on the required duty. TECHNICAL DESCRIPTION This bench-top unit is self-contained and includes a reservoir and pipework for continuous water circulation. Ball valves at the pump inlets and outlets allow the configuration to be selected. A manually operated valve controls the flow, which is monitored by a single orifice plate. The two single-stage pumps are driven by close-coupled 180W ac induction motors. Maximum head (each pump) is 10mWG, and maximum flow (each pump) is 1 litre/s (at 50Hz). Measurement sensors are included in the supply. They monitor: ➤ pressure head across each of the pumps ➤ ∆ P across the orifice plates (hence flow-rate) ➤ water temperature at the inlet ➤ rotational speed of the impellers A CD-ROM with data logging educational software is included in the supply of this unit. Optional power measurement sensors are available, to measure the consumption of each pump. Note: If at least one power measurement sensor is ordered, all the practical exercise capabilities of the Single Centrifugal Pump Demonstration Unit FM20 can be performed.
