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 77)
Preparations for use
4.4 Configuration of the cooling circuit and coolant supply
SIMOTICS FD 1MH1
34
Operating Instructions 08/2017
Summary of Contents for SIMOTICS FD 1LL1
Page 2: ...18 08 2017 17 24 V10 00 ...
Page 176: ...Disposal 11 4 Disposal of components SIMOTICS FD 1MH1 176 Operating Instructions 08 2017 ...
Page 178: ...Service and Support SIMOTICS FD 1MH1 178 Operating Instructions 08 2017 ...
Page 182: ...Quality documents SIMOTICS FD 1MH1 182 Operating Instructions 08 2017 ...
Page 187: ......