6 Commissioning/Start-up/Shutdown
40 of 80
Vitacast / Vitacast Bloc
Table 13:
Flow rate of the flushing liquid
Material combination of seal
faces
Hard-soft combination
Hard-hard combination
Pump speed
1450
[rpm]
2900
[rpm]
1450
[rpm]
2900
[rpm]
Mechanical seal diameter
[mm]
Flow rate flushing
liquid
[l/min]
Flow rate flushing
liquid
[l/min]
Flow rate flushing
liquid
[l/min]
Flow rate flushing
liquid
[l/min]
20
0,4 - 1,0
0,7 - 1,9
0,4 - 1,2
0,9 - 2,2
28
0,6 - 1,2
1,0 - 2,4
0,7 - 1,6
1,3 - 3,1
43
1,0 - 1,9
1,8 - 3,8
1,2 - 2,8
2,2 - 5,4
55
1,0 - 2,4
2,0 - 4,6
1,3 - 3,4
2,6 - 6,7
The lower flushing limit refers to a temperature of the fluid handled of 25 °C and a
barrier pressure of 1 bar. The upper flushing limit refers to a temperature of the fluid
handled of 100 °C and a barrier pressure of 10 bar. The flow rate of the flushing
liquid must be adjusted to the actual conditions (pressure, temperature). The data
refer to a temperature difference of 5 °C between the inlet and outlet of the flushing
liquid.
6.1.7.3.2.3 Applications
For seal type Q, operating mode DB
6.2 Operating limits
DANGER
Non-compliance with operating limits for pressure, temperature, fluid handled and
speed
Explosion hazard!
Hot or toxic fluid could escape!
▷
Comply with the operating data indicated in the data sheet.
▷
Never use the pump for handling fluids it is not designed for.
▷
Avoid prolonged operation against a closed shut-off element.
▷
Never operate the pump at temperatures, pressures or rotational speeds
exceeding those specified in the data sheet or on the name plate unless the
written consent of the manufacturer has been obtained.
DANGER
Formation of a potentially explosive atmosphere inside the pump
Explosion hazard!
▷
When draining tanks take suitable measures to prevent dry running of the
pump (e.g. fill level monitoring).
6.2.1 Ambient temperature
CAUTION
Operation outside the permissible ambient temperature
Damage to the pump (set)!
▷
Observe the specified limits for permissible ambient temperatures.
Observe the following parameters and values during operation: