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Materials used in the cooling circuit
The materials used in the cooling circuit must the coordinated with the materials in the motor
(aluminum alloy) and hose connection (nickel plated brass).
Materials and components in the cooling circuit
The following table lists a wide variety of materials and components which may or may not
be used in a cooling circuit.
Table 3- 6
Materials and components of a cooling circuit
Material
Zinc
Brass
Copper
Common steel (e.g. St37)
Cast steel, cast iron
High-alloy steel, Group 1 (V2A)
High-alloy steel, Group 2 (V4A)
ABS (AcrylnitrileButadieneStyrene)
Installation comprising different
materials (mixed installation)
PVC
Hoses
Gaskets
Hose connections
SIMOTICS A-1FV5/1PV5 synchronous/induction motors
Operating Instructions, 03/2014, 610.45002.40
Used as
Description
Pipes, valves and
Use is not permitted. Non-ferrous metals chips can lead to pitting
fittings
corrosion in galvanized pipes.
Zinc breaks down the glycol-based inhibitors.
Pipes, valves and
Can be used in closed circuits.
fittings
Pipes, valves and
Can be used only in closed circuits in which the heat sink and
fittings
copper component are separated (e.g. connection hose of the
units).
Pipes
Permissible in closed circuits and semi-open circuits with
inhibitors or Antifrogen N, check for oxide formation, inspection
window recommended.
Pipes, motors
Closed circuit and use of strainers and flushback filters. Fe
separator for stainless heat sink.
Pipes, valves and
Can be used for drinking or municipal water with a chloride
fittings
content up to <250 ppm, suitable according to definition in
Chapter "Coolant definition".
Pipes, valves and
Can be used for drinking or municipal water with a chloride
fittings
content up to <500 ppm, suitable according to definition in
Chapter "Coolant definition".
Pipes, valves and
Suitable according to the definition in Chapter "Coolant
fittings
definition". Suitable for mixing with inhibitor and/or biocide as
well as Antifrogen N.
Pipes, valves and
Use is not permitted.
fittings
Pipes, valves,
Use is not permitted.
fittings and hoses
Reduce the use of hoses to a minimum (device connection).
Must not be used as the main pipe for the whole system.
Recommendation: EPDM hoses with an electrical resistance
> 10
9
DEMITTEL; from PE/EPD, supplied from Telle).
Pipes, valves and
Use of Viton, AFM34, EPDM is recommended.
fittings
Transition
Secure with clips conforming to EN14420, available, e.g. from
Pipe - hose
the Telle company.
Ω (e.g. Semperflex FKD supplied from Semperit or
Description
3.4 Design
21
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