Installation
25
300750767_002_C3 - 12/2020 - © Leybold
3.4 Connecting Cooling Water
Connect the cooling water and ensure that the cooling water discharge is not
constricted in any way.
Select the lines in view of the temperatures and pressures which are to be
expected. Select a nominal width which is as wide as possible so as to avoid
pressure losses especially for the discharge (flow velocity below 2 m/s).
The temperature of the discharged cooling water must not exceed 50 °C as
otherwise the lines will tend to calcify.
Ensure an adequate cooling water flow in accordance with the technical
data.
With the pump warm from operation do not suddenly supply very cold
cooling water; there is the risk of a crash due to shock cooling.
Cooling water data for the pump
Materials in the cooling circuit of the pump
AISI 304, red brass, brass, EPDM,
epoxy paint,
Feed temperature
5 °C − 35 °C
Feed pressure
2 – 7 bar (g)
Type
Power loss to
be dissipated
by the cooling
water
Cooling water demand at feed temperature
(assuming a constant discharge temp. of 50 °C)
30°C...35°C 25°C...30°C 20°C...25°C
<20°C
kW
l/min
l/min
l/min
l/min
DV
200/300/500
4
10.0
8.0
6.0
4.0
Do
not
connect the cooling water using self-sealing quick locks or shut off
the feed and discharge lines with valves.
If work on the water cooling system becomes necessary and in the case of a
longer standstill or transportation, completely drain out all cooling water and
completely dry the lines (e.g. with nitrogen).
Block or label the area of the cooling water and exhaust lines to prevent acci-
dents through tripping.
NOTICE
