Grundfos BMS Series - BMS Hp Pump; BMS Hs Pump

10.1 BMS hs pump
This procedure describes how to shut down the BMS hs pump.
1
2
3
4
5
6
7
8
9
11
12
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B
A
TM1040026
Example of a BMS hs pump
Pos. Description
A Built-in non-return valve
B 1000 ppm TDS
Procedure
1. Ramp down the BMS hs pump (6) according to the factory
settings. See the figure below (3 and 4).
2
3
1
4
rpm
1700
3s
t[s]
TM061079
Ramp down
Ramp down from 1700 to 0 rpm in three seconds.
2. Stop the feed pump (1).
3. Start the fresh-water flush pump (12), and flush the system with
fresh water (11), minimum 2 bar for flushing.
4. Flush the system until the salinity is lower than 1000 ppm
TDS. When flushing, BMS 7-42 must operate at minimum
speed. For bigger sizes operating at minimum speed is
recommended.
5. Stop the fresh-water pump (12).
6. Close all valves to keep the fresh water in the system during the
shutdown.
Only flush desalination systems pumping seawater or similar
aggressive liquids.
To flush the thrust bearing of the BMS hs pump, start the
pump for 30 seconds to allow the fresh water to enter into
the thrust bearing.
If the flushing takes more than 10 minutes, reduce the
flow rate to maximum 10 % of the rated flow rate.
During periods of inactivity, fill the pump with clean fresh
water.
10.2 BMS hp pump
This procedure describes how to shut down the BMS hp pump.
1
2
3
4
5
6
7
8
9
11
12
10
TM061078
Example of a BMS hp system
Procedure
1. Ramp down the BMS hp pump (6) according to the factory
settings. See the figure below (3 and 4).
2
3
1
4
rpm
1700
3s
t[s]
TM061079
Ramp down
Ramp down from 1700 to 0 rpm in three seconds.
2. Stop the feed pump (1).
3. Start the fresh-water flush pump (12), and flush the system with
fresh water (11), minimum 2 bar for flushing.
4. Flush the system until the salinity is lower than 1000 ppm TDS.
5. Stop the fresh-water pump (15).
6. Close all valves to keep the fresh water in the system during the
shutdown.
To flush the thrust bearing of the BMS hp pump, start the
pump for 30 seconds to allow the fresh water to enter into
the thrust bearing.
If the flushing takes more than 10 minutes, reduce the
flow rate to maximum 10 % of the rated flow rate.
During periods of inactivity, fill the pump with clean fresh
water.
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English (GB)