Siemens SIMOTICS T-1FW3 Configuration Manual page 41

Materials used in the motor cooling circuit
The materials used in the cooling circuit must be coordinated with the materials in the motor.
Materials used in the motor (cooling jacket material): E355 AR (1.0580), DD11 (1.0332)
Materials and components in the cooling circuit
Note
Minimizing electrochemical processes in the cooling circuit
The electrochemical processes that take place in a cooling system must be minimized by
choosing the right materials.
Avoid combinations of different materials, such as copper, brass, iron, or halogenated plastic
(PVC hoses and seals).
The following table lists a wide variety of materials and components that may or must not be
used in a cooling circuit.
Table 3- 2 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 (AcrylnitrileButadieneSty-
rene)
Installation comprising different
materials (mixed installation)
PVC
Hoses
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
Used as Description
Pipes, valves and Use is not permitted.
fittings
Pipes, valves and Can be used in closed circuits with inhibitor.
fittings
Pipes, valves and Can be used only in closed circuits with inhibitors in which the heat
fittings sink and copper component are separated (e.g. connection hose on
units).
Pipes Permissible in closed circuits and semi-open circuits with inhibitors
or Antifrogen N, check for oxide formation, inspection window rec-
ommended.
Pipes, motors Closed circuit and use of strainers and flushback filters. Fe separa-
tor for stainless heat sink.
Pipes, valves and Can be used for drinking or tap water with a chloride content up to <
fittings 250 ppm, suitable according to definition in Chapter "Cooling water."
Pipes, valves and Can be used for drinking or tap water with a chloride content up to <
fittings 500 ppm, suitable according to definition in Chapter "Cooling water."
Pipes, valves and Suitable according to definition in Chapter "Cooling water." Suitable
fittings 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. Recommenda-
tion: EPDM hoses with an electrical resistance > 10
perflex FKD supplied by Semperit or DEMITTEL; from PE/EPD,
supplied by Telle).
Mechanical properties
3.1 Cooling
Ω (e.g. Sem-
9
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