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Products  |  Fluid Mechanics  |  Hydraulic Fluid Energy Machines  |  HM 286
HM 286 Experiments with a Gear Pump Show data sheet (pdf file) Print page
Technical Description

  Gear pumps belong to the group of positive displacement pumps with a continuous flow. Two counter-rotating gears transport the medium from the suction side to the delivery side. The transported medium is between the housing and the tooth spaces. The pulsation-free flow increases linearly with speed. These pumps are particularly suitable for the generation of medium-high pressure at low flow rates. 

  The experimental unit provides the basic experiments to get to know the operating behaviour and the most important characteristic variables of gear pumps.

  HM 286 features a closed circuit with a tank and a gear pump with variable speed via frequency converter. The pump gears are mounted in a transparent housing and can be observed during operation.  Flow rate and head are adjusted via a needle valve and an overflow valve. Oil is used as the medium.

  The experimental unit is fitted with sensors for pressure, temperature and flow rate.

  The microprocessor-based measuring technique is well protected in the housing. All the advantages of software-supported experiments and evaluation are offered by the GUNT software and the microprocessor. The connection to a PC is made by USB.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- principle of operation of a gear pump
- recording of pump characteristics
- relationship between head and speed

- effect of pressure limitation

- determination of efficiencies


* Illustrative model of a rotary-type positive

  displacement pump1
* Closed oil circuit1
* GUNT software for data acquisition, visualisation

  and operation1

* Part of the GUNT Labline fluid energy machines

Alternative products
HM 365.18 -- Gear Pump Module
HM 365.22 -- Gear Type Oil Pump Module

[1] functioning and operating behaviour of a gear pump

[2] closed oil circuit contains a gear pump with variable speed via frequency converter and a transparent tank

[3] transparent housing for observing the pump gears

[4] needle valve for adjusting the flow rate

[5] overflow valve for adjusting the head

[6] sensors for temperature and pressure on intake and delivery side of the pump

[7] oval wheel meter as flow sensor

[8] microprocessor-based measuring technique

[9] unit-specific GUNT software for data acquisition and operation via USB under Windows XP,  Windows Vista or Windows 7


Technical Data

Gear pump with speed-controlled drive

- power consumption: 370W

- nominal speed: 200...1.000min-1
- max. flow rate: approx. 15cm per revolution

- max. head: approx. 100m

Overflow valve: 0...4,5bar


Measuring ranges

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

- pressure (delivery side): 0...5bar

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

- temperature: 0...100C


Dimensions and Weight
LxWxH: 670x590x750mm
 approx. 50kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Scope of Delivery

1 experimental unit

5L oil (ISO VG 100)

1 GUNT software CD + USB cable
1 set of instructional material

Order Details

070.28600  HM 286  Experiments with a Gear


© 2005 G.U.N.T. Gerätebau GmbH