SPX Cooling Technologies TG MAG23-65 Water Pump User Manual


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A.0500.551 – IM-TGMAG/02.00 EN (02/2008)
3.18.2.5 Stability
Foundation
The pump unit must be installed on a base plate or on a frame placed exactly level on the founda-
tion. The foundation must be hard, level, flat and vibration free to guarantee correct alignment of the
pump/drive while operating. See also section 3.18.7 Guidelines for assembly and section 3.18.7.6
Shaft coupling.
Horizontal mounting
Pumps are to be mounted horizontally on the integral feet. Other kinds of installation have an
influence on draining and filling, etc. If the pump/pump unit is installed differently, contact your
distributor.
Support
The support under the bearing bracket is designed to
absorb belt forces and vibrations while letting the pump
shaft expand freely along its axis.
3.18.3 Drives
If a bare shaft pump is supplied, the user is responsible for the drive and the assembling with the
pump. The user also must provide guarding of moving parts. See also section 3.18.7 Guidelines for
assembly.
3.18.3.1 Starting torque
• Thestartingtorqueofinternalgearpumpsisalmostidenticalto the nominal torque.
• Takecarethatthemotorhasasufcientlylargestartingtorque.Thereforechooseamotorwitha
capacity25%higherthanthepumppowerconsumption.
Note! A mechanical variable speed drive requires checking of the available torque at low and high
speed.
• Frequencyinvertorsmayhavelimitedthestartingtorques.
• Theselectionofthesizeandperformanceofthemagneticcouplingdependsontheoutput
torque of the drive motor during start-up. Please verify that the maximum allowable torque of the
magnetic coupling is not exceeded.
3.18.3.2 Radial load on shaft end
The shaft end of the pump shaft may be loaded in radial sense with the maximum radial force (Fr).
See table.
TG MAG pump size Fr_max [N]
15-50
1000
23-65
58-80
1800
86-100
185-125 2500
• Thisforceiscalculatedforthemaxiumallowabletorqueattheshaftendandforabearinglifeof
25.000 hours.
• Incaseadirectdrivewithaexiblecouplingisused,theindicatedforcewillnotbeexceeded
when pump and drive are well aligned.
• StartingwiththeTGMAG15-50,V-beltdrivecanbeused.
In case of V-belt drive
The maximum allowable radial force Fr as indicated in the table may be chosen higher but must
be calculated case by case in function of pressure, torque and size of the pulley. Consult your
distributor for advice.
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