75
WATER-COOLED DEVICES
5 Installation and Operation of Liquid-Cooled Devices
5.1 Water-cooled devices
Theuseofwater-cooledKEBCOMBIVERTdrivecontrollersisoered,becausethere
are process-caused coolants available with some applications. However, the following
instructions must be observed.
5.1.1 Heat sink and operating pressure
Design system Material max. operating pres-
sure
Connection
Aluminium heat sink with
stainless steel tubes
Stainless steel 1.4404 10 bar
=> „5.1.4 Connection
of the cooling system“
NOTICE
Deformation of the heat sink!
► In order to avoid a deformation of the heat sink and the damages
thereby, the indicated maximum operating pressure may not be
exceededbrieyalsobypressurepeaks.
► The pressure equipment directive 2014/68/EU on pressure equip-
ment must be observed!
5.1.2 Materials in the cooling circuit
For the screw connections and also for the metallic articles in the cooling circuit which are in con-
tactwiththecoolant(electrolyte)amaterialistobeselected,whichformsasmallvoltagedier-
ence to the heat sink in order to avoid contact corrosion and/or pitting corrosion (electro-chemical
voltageseries,seethefollowingtable).Thespeciccaseofapplicationmustbecheckedbythe
customerintuningofthecompletecoolingcircuitandmustbeclassiedaccordingtotheused
materials. With hoses and seals take care that halogen-free materials are used.
A liability for occuring damages by wrongly used materials and from this resulting corro-
sion cannot be taken over!
Material formed ion Standard poten-
tial
Material formed ion Standard poten-
tial
Lithium Li+ -3.04 V Nickel Ni2+ -0.25 V
Potassium K+ -2.93 V Tin Sn2+ -0.14 V
Calcium Ca2+ -2.87 V Lead Pb3+ -0.13 V
Sodium Na+ -2.71 V Iron Fe3+ -0.037 V
Magnesium Mg2+ -2.38 V Hydrogen 2H+ 0.00 V
Titan Ti2+ -1.75 V Stainless
steel
various 0.2...0.4 V
Aluminium Al3+ -1.67 V Copper Cu2+ 0.34 V
Manganese Mn2+ -1.05 V Carbon C2+ 0.74 V
Zinc Zn2+ -0.76 V Silver Ag+ 0.80 V
continued on the next page
To Next Page
Loading...
Need help?
General