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The intelligent and user friendlyvariable speed drive

for centrifugal pumps and blowers

HYDROVAR®

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Why retrofitting with HYDROVAR?

Less wear duringoperationLess mechanical stressbecause of lower speed ofthe pumps duringoperation and no additio-nal load in the startingmoment, because of thesoft start.

Energy savingsThe adjustment of thepump speed andperformance to theactual demand can leadinto energy savings ofup to 70 %. No water

hammerThe steady operation ofthe pumps also in par-tial loads preventswater hammer, whichnormally arise in thestart/stop operation offull speed pumps.

Lower noiseLess noise of the pumpbecause of running atlower speeds duringoperation.Less noise in the pipelineand valves because ofadjustment of the pumpperformance to the actualdemand and control alongthe system curve.

Lower startingcurrentHigh current peaks areprevented by adjusting thestart ramp times as you canfind in a soft starter.

Multi pumpcontrol possibleBecause of the integratedmulti pump controller, allfeatures for lead-lagpump operation andsequencing are possibleover the RS 485 interfacewithout any additionaldevices.

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Advantages:

Retrofitting is possible on all exis-ting standard asynchronousmotors, which are suitable for VFDoperation

Automatic adjustment of the pumpperformance to varying demands

Optimised cooling of theHYDROVAR, depending on thepower and the speed of the pump,is guaranteed by the motor fan

Longer maintenance intervalsbecause of less stress to the pumpand the motor

Constant system pressure in watersupply and booster stations.Possibility of control along the systemcurve for circulating pumps for theHVAC market

No external panels, contactors andmotor protection devices arerequired

All hydraulic control functions areincluded in the HYDROVAR. There-fore no additional external con-trollers are required

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The brilliant mountingmethod of the HYDROVARunit allows a very simple,fast and cheap retrofittingon existing pump stations

Direct mounting on themotor is possible forpower ranges from1,1 up to 22 kW

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All units are also availableas a wall mounting versionup to 45 kW.

4 Steps to become a HYDROVAR-Pump:

1 2

3 4

Especially in the operation at partial loads of a centrifugal pump there will besignificant potential of energy savings!

Example: Circulation pump with nominal power in partial load operation:

yticapac%ni

evrucrepsanoitpmusnocrewop

Wknignivasrepgnivas

raey3/1)sruoh0292(tapmup

deepstnatsnoctapmup

deepselbairav

%52%05%57

Wk8,5Wk6,7Wk2,9

Wk8,1Wk2,3Wk7,5

Wk0,4Wk4,4Wk5,3

hWk086.11hWk848.21hWk022.01

hWk847.43Energy savings within 1 year (8.760 hours)

Compared with the installation costs for the HYDROVAR units there will be a payback time of less than one years(depending of the energy costs).

Liste 5820-1 e

Pumpenfabrik ERNST VOGEL GmbHA-2000 Stockerau, Ernst Vogel-Straße 2, Tel. +43(0)2266/604, Fax +43(0)2266/60 42 58www.hydrovar.com