FM21 SERIES AND PARALLEL PUMPS DEMONSTRATION UNITCentrifugal 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. calibrating and performing the teaching exercises. • Capable of being linked to a PC (not supplied) via the IFD6 interface console (available as an essential accessory). processing and displaying data graphically. • Equipped with electronic measurement sensors for pump differential pressure. see page 35). • Self-contained. operating. temperature and rotational speed. Full theoretical back-up is included together with a student questions and answers session. • Supplied with software providing full instructions for setting up. bench-top machine. • Powered via the SWA1 power measurement unit (available as an essential accessory). at inherent speed ➤ Comparative measurement of power and overall efficiency at different speeds (with 2 SWA1) ➤ Comparison of student calculations with computer results ORDERING INFORMATION FM21-50 for 50Hz mains supply FM21-60 for 60Hz mains supply (Note: Voltage compensation takes place in the IFD6. ESSENTIAL ARMFIELD ACCESSORIES IFD6 Interface Device (page 35) Two SWA1 Integrating Wattmeters (page 35) . Facilities are provided for logging. parallel or single pump operation ➤ Comparison of head-flow characteristics with single pump operation.INSTRUCTIONAL CAPABILITIES ➤ Demonstration of either series. orifice differential pressure (flow-rate). OVERALL DIMENSIONS Height: 780mm Length: 850mm Width: 450mm SHIPPING SPECIFICATIONS Gross Weight: 50Kg Volume: 0.50m 3 ORDERING SPECIFICATION • A small-scale series/parallel pump demonstration unit.