Characteristics Variables of Hydraulic Turbo-machines Apparatus Model FM 125

Sci-tech Characteristics Variables of Hydraulic Turbo-machines Apparatus Model FM 125 can be used to investigate a centrifugal pump. Experiments can be performed on two key water turbine designs: Pelton and Francis turbine, available as accessories FM 16 and FM 21.

Item Description

Turbo-machines such as pumps and turbines are energy converters. Turbines convert flow energy into mechanical energy and pumps convert mechanical energy into flow energy. The closed water circuit comprises a tank, a standard centrifugal pump with variable speed and a flow control valve to adjust the back pressure. The speed is detected contact-free by means of an inductive displacement sensor on the motor shaft. To determine the drive power, the drive motor is mounted on swivel bearings and equipped with a force sensor to measure the drive torque. Pressures at the inlet and outlet of the pump are measured. The flow rate is measured by means of an electromagnetic flow meter. The measured values are displayed digitally and processed further on a PC. The PC is used to calculate the power output data of the examined turbo-machine and to represent them in characteristics.
One of the turbines FM 16 or FM 21 can also be placed on top of the storage tank. The centrifugal pump supplies the turbine with water. The measured values of the turbine are transferred via cable to FM 125. A special feature of FM 125 is the ability to operate pump and turbine at the same time. Relevant measured values are recorded  contemporaneously at both turbo-machines. Thus the trainer can be used as a pumped storage plant.

Characteristic variables of water turbines and centrifugal pumps
 Pelton turbine FM 16 and Francis turbine FM 21extend the scope of experiments
 Pumped storage plant


Technical Specifications

1. Determining characteristic variables of a centrifugal pump
2. Determining characteristic variables of water turbines together with the accessories FM 16 & FM 21
3. Experiments on a pump in a closed water circuit with storage tank and flow control valve to adjust the back pressure
4. Experiments on turbines: closed water circuit for supplying turbines
5. Pipes and fittings made of PVC
6. 3-phase AC motor for pump with variable speed via frequency converter
7. Non-contact speed measurement at the turbine shaft and force sensor at the brake for measuring the torque
8. Digital displays for pressures, flow rate, speed and torque
9. Software for data acquisition via USB under Windows 7, 8.1, 10

Technical Specifications
Standard centrifugal pump
o max. head: 23,9m
o max. flow rate: 31m3/h
Drive motor with variable speed
o power output: 2,2kW
o speed range: 0…3000min-1
Storage tank: 250L
Measuring ranges
o pressure: 2x 0…4bar abs.
o flow rate: 0…40m3/h
o torque: 0…20Nm
o speed: 2x 0…4000min-1

Centrifugal pump
o measuring inlet and outlet pressures of the pump
o determining delivery height
o determining hydraulic output
o determining mechanical output
o recording characteristics at various speeds
o determining the efficiency
With accessories Pelton turbine FM 16 or Francis turbine FM 21
o measuring torque and speed
o determining efficiency of the turbine
o recording characteristics
o demonstration of a pumped storage plant

 Mains Power 220 – 240V @ 50Hz, 1Ph