Use either stainless steel or steel (S235JR) for the cooling circuit pipes and fittings.
4.4.2
Pressures and differential pressures in the cooling circuit
The maximum permissible overpressure in the heat sink and thus in the cooling circuit must not
exceed 6 bar.
● If you are using a pump, which reaches more than this maximum pressure, then on the plant
or system side ensure that the maximum pressure is not exceeded.
● The lowest possible differential pressure between the coolant in the supply and return lines
should be selected to allow use of pumps with a flat characteristic. The maximum differential
pressure for a heat sink varies from shaft height to shaft height. Higher pressure differences
significantly increase the risk of cavitation and abrasion.
Machine type
Flow rate ± 10 %
[l/min]
Pressure drop for fresh water
[bar]
1LH….-3A…-….
1MH….-3A…-….
40
1.0
1LH….-3B…-….
1MH….-3B…-….
40
1.2
1LH….-4A…-….
1MH….-4A…-….
60
1.1
1LH….-4B.1.-….
1MH….-4B.1.-….
60
1.2
1LH….-4B.3.-….
1MH….-4B.3.-….
60
1.2
1LH….-4B.5.-….
1MH….-4B.5.-….
80
1.2
1LH….-4B.7.-….
1MH….-4B.7.-….
80
1.2
● The pressure drop is dependent on the machine type. The machine type is stamped on the
rating plate.
● If there is a risk of frost, use cooling water with antifreeze suitable for this temperature.
The pressure drop increases when antifreeze is added.
See also
Connecting the cooling water supply (Page 70)
Preparations for use
4.4 Configuration of the cooling circuit and coolant supply
SIMOTICS FD 1LH1
30
Operating Instructions 01/2019
Summary of Contents for SIMOTICS FD 1LH1
Page 2: ...23 01 2019 19 26 V11 01 ...
Page 28: ...Description SIMOTICS FD 1LH1 28 Operating Instructions 01 2019 ...
Page 122: ...Operation 8 10 faults SIMOTICS FD 1LH1 122 Operating Instructions 01 2019 ...
Page 140: ...Maintenance 9 2 Corrective Maintenance SIMOTICS FD 1LH1 140 Operating Instructions 01 2019 ...
Page 162: ...Disposal 11 5 Disposal of components SIMOTICS FD 1LH1 162 Operating Instructions 01 2019 ...
Page 164: ...Service and Support SIMOTICS FD 1LH1 164 Operating Instructions 01 2019 ...
Page 168: ...Quality documents SIMOTICS FD 1LH1 168 Operating Instructions 01 2019 ...
Page 173: ......