6 Commissioning/Start-up/Shutdown
36 of 72
Sewatec (60 Hz)
Size
Maximum operating pressure
Maximum test pressure
[psi]
[bar]
[psi]
[bar]
150 - 401
145
10
217
15
150 - 403
145
10
217
15
151 - 403
145
10
217
15
200 - 315
87
6
130
9
200 - 316
87
6
130
9
200 - 317
58
4
87
6
200 - 318
58
4
87
6
200 - 330
145
10
217
15
300 - 401
145
10
217
15
K 200 - 402
145
10
217
15
200 - 403
145
10
217
15
250 - 400
145
10
217
15
250 - 401
145
10
217
15
250 - 403
145
10
217
15
300 - 400
145
10
217
15
300 - 401
145
10
217
15
6.2.2 Frequency of starts
To prevent high temperature increases in the motor and excessive loads on the
pump, motor, seal elements and bearings, the following number of starts per hour
shall not be exceeded.
Table 17:
Frequency of starts
Motor rating
Maximum number of starts
[hp]
[kW]
[Starts per hour]
≤ 15
≤ 11
25
≤ 50
≤ 37
20
6.2.3 Fluid handled
6.2.3.1 Temperature of the fluid handled
CAUTION
Impermissibly high temperature of fluid handled
Damage to the pump!
▷
Prolonged operation against a closed shut-off element is not permitted
(heating up of the fluid).
▷
Observe the temperature limits in the data sheet and in the section on
operating limits.
(
ð
Section 6.2, Page 34)
6.2.3.2 Density of the fluid handled
The power input of the pump changes in proportion to the density of the fluid
handled.
CAUTION
Impermissibly high density of fluid handled
Motor overload!
▷
Observe the information on fluid density in the data sheet.
▷
Make sure the motor has sufficient power reserves.
