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4.4.3
Components and materials of the cooling circuit
The following table lists a wide variety of materials and components which can occur in a
cooling circuit or which are prohibited.
Table 4-1
Materials and components of a cooling circuit
Material
Zinc
Brass
Copper
Steel (e.g. S235JR)
Cast steel, cast iron
High-alloy steel, Group 1
(V2A)
High-alloy steel, Group 2
(V4A)
Installation employing differ‐
ent materials ("mixed instal‐
lation")
PVC
Hoses
Gaskets
Hose connections
4.4.4
Potential equalization on the cooling circuit components
● Connect an equipotential bonding conductor to all of the components in the cooling system
● Implement the equipotential bonding using a copper rail or finely stranded copper cable
SIMOTICS FD 1MH1
Operating Instructions 08/2017
Component
Pipes, valves and fit‐
tings
Pipes, valves and fit‐
tings
Pipes, valves and fit‐
tings
Cable
Pipes, motors
Pipes, valves and fit‐
tings
Pipes, valves and fit‐
tings
Pipes, valves and fit‐
tings
Pipes, valves and fit‐
tings, hoses
Pipes, valves and fit‐
tings
Transition from pipe to
hose
(motor, converter, piping system, etc.).
with the appropriate cable cross-sections. In this way, you suppress electrochemical
processes.
4.4 Configuration of the cooling circuit and coolant supply
Remark
Do not use any components manufactured out of zinc.
Can be used in closed cooling circuits with inhibitor.
Can only be used in closed cooling circuits with inhibitor. Locate an
isolating element, e.g. connecting pipe of the devices, between the
heat sink and copper component.
Can be used in closed cooling circuits with inhibitors or anti-freeze.
Check for the formation of oxide; to do this, use a sight glass, for
example.
Can be used in closed cooling circuits. Use sieves and return flush
filter; for stainless steel cooling systems, use a Fe separator.
Can be used for drinking or municipal water with a chloride content
< 250 ppm.
Can be used for drinking or municipal water with a chloride content
< 500 ppm.
Do not use a mixed installation.
Do not use any components manufactured out of PVC.
Reduce the use of hoses for connecting devices to a minimum. Do
not use any hoses as main connecting line for the complete system.
Recommendation: EPDM hoses with an electrical resistance > 10
Ω, e.g. "Semperflex FKD" supplied from Semperit or "DEMITTEL"
from PE/EPD, supplied from the Telle company.
Use seals manufactured from fluorinated rubber in accordance with
DIN ISO 1629, AFM34, EPDM (recommended).
Fasten the hose connections with bracket clamps in accordance
with EN 14420.
Preparations for use
9
35
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