Series and Parallel Pumps Teaching Equipment

Learning Objectives / Experiments :

• Start-up of a pump and analysis of different aspects to be considered
• Pump priming
• Checking the direction of rotation
• Analysis of overcurrent produced in the motor
• Study and determination of pump characteristic curves
• Head – flow
• Hydraulic power – flow
• Torque – flow
• Mechanical efficiency – flow
• Mechanical power – flow
• Motor efficiency – flow
• Electrical power – flow
• Total efficiency – flow
• Study of cavitation and determination of the N.P.S.H. required – flow curve
• Study of different methods of pump regulation and verification of similarity laws
• Variation of rotational speed and determination of new characteristic curves
• Changing the operating point by varying the pumping installation
• Regulation using the discharge valve
• Analysis of the operation of identical and different pumps working in groups
• Characteristic curves for pumps operating in series
• Head – flow
• Power – flow
• Efficiency – flow
• Characteristic curves for pumps operating in parallel
• Head – flow
• Power – flow
• Efficiency – flow

Technical Details :

Internal Diameters :

• Suction pipe: Ø interior = 45.2 mm, Ø exterior = 50 mm
• Delivery pipe: Ø interior = 34 mm, Ø exterior = 40 mm

Tank :

• Internal tank capacity: 20 L
• External water source: Not required
• Material: PVC Plexy

Manometers :

• Bourdon type with glycerin: -10 m.c.a. to 70 m.c.a.
• Bourdon type with glycerin: -10 m.c.a. to 35 m.c.a. (3 units)

Pump Characteristics :

• Maximum flow rate: 50 L/min
• Maximum head: 12 m water
• Speed control: Variable
• RPM measurement display

Other Elements :

• Electronic flow meter: 1200–50000 L/h with display
• Dynamometer: 2 kg × 10 g
• Wattmeter: 0–1200 W
• Variable frequency drive: 220 V, 1.1 kW
• Clear PVC pipes for visibility of the flow
• Transparent pump impeller for visual observation

Pressure Gauges :

• Inlet pressure: 0–100 PSI
• Pump outlet pressure: 0–200 PSI