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HM 286 Experiments with a Gear Pump
Education / GUNT Hamburg / Fluid Mechanics and Hydrology / Hydraulic Fluid Energy Machines /

The HM 286 demonstration unit enables the operating behaviour of a gear pump to be investigated. These pumps are particularly suitable for the generation of medium-high pressures at low flow rates. In practice this type of pump is predominantly used in oil-based hydraulics. The demonstration model consists of a system of pipes made of steel and a tank made of Plexiglass. Electronic sensors provide the flow rate, relevant pressures, the temperature of the pumped medium as measured values. The pump output can be changed using a needle valve. The software for data acquisition and visualisation makes the experiments especially clear and enables fast execution of experiments with reliable results.

Learning Objectives / Experiments

- investigation of the operating behaviour of a gear

- recording of the pump curve
- determination of the efficiency at various water



[1] experimental unit for the demonstration of the operating behaviour of a gear pump
[2] processing of measured data on a PC
[3] system pressure regulator using overflow valve

[4] determining the flow rate using a flowmeter

[5] pressure measurement in pump intake and delivery lines
[6] temperature measurement

[7] LabVIEW software for data acquisition via USB under Windows XP, Windows Vista or Windows 7


Technical Data

Pump with motor

- power consumption: 370W

- speed: 1.000min-1
- max. flow rate: ca. 15cm³ per revolution

- max. head: ca. 100m

Overflow valve: 0...4,5bar

Manometer: 0...160bar 

Pipes and fittings made of steel

Measuring ranges

- pressure (intake side): 0...1bar

- pressure (delivery side): 0...5bar

- flow rate: 0...25L/min

- temperature: 0...100°C


Dimensions and Weight
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Scope of Delivery
1 experimental unit
1 LabVIEW software CD + USB cable
1 instruction manual
Order Details

070.28600  HM 286  Experiments with a Gear