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9.8 BME hp feed pump
To start up a BME hp feed pump, proceed as follows:
1. Start the sea-water feed pump (P1), and check that the inlet
pressure of the pump is higher than 1.0 bar (10 metres head)
and lower than 35 bar (350 metres head).
2. Vent the BME hp feed pump. See section
venting and checking direction of
3. Start the BM hp circulation pump (P4). See section
circulation
pump.
Check that the oil level in the oil container stabilises between
minimum and maximum.
4. Check the direction of rotation as described in section
9.9 Liquid filling, venting and checking direction of
5. Start the BME hp feed pump.
6. Set the discharge pressure of the BME hp feed pump to the
desired value by means of either a variable-frequency drive or
a control valve (V5).
7. Check that the inlet pressure of the BME hp feed pump is
higher than 1.0 bar (10 metres head) and lower than 35 bar
(350 metres head).
9.9 Liquid filling, venting and checking direction of
rotation
Procedure:
1. Open the valve on the inlet side of the pump. The pump is
normally primed by the pressure from the sea-water feed
pump.
2. Open the air escape valve on the discharge side of the pump.
3. Continue the filling procedure until water runs out of the air
escape valve.
4. If the system is fitted with an isolating valve on the discharge
side of the BM hp circulation pump, open this valve approx. 1/
4.
5. Start the pump (for 1 sec. only), and check the direction of
rotation. The correct direction of rotation is indicated on the
cover of the V-belt screen. If necessary, interchange two
phases to the motor.
9.9 Liquid filling,
rotation.
9.7 BM hp
rotation.
10. Checking the operation of the BMEX system
Check the following at suitable intervals:
•
Flow and pressure.
•
Current consumption.
•
Lubricating oil level.
•
Whether the oil container contains water (the lubricating oil
should be changed every 2,000 operating hours or every 6
months, whichever comes first).
•
Whether the motor ball bearings are being greased
(check that excessive grease can escape through the drain
hole in bearing cover).
•
Whether the bearings are worn.
•
Whether the V-belts are tightened correctly.
Check every 6 months. See section
•
Whether the shaft seal is leaky.
The drain hole underneath the pulley must be free from
deposits. If required, flush with clean fresh water at a minimum
pressure of 1 bar.
The shaft seal is lubricated by the pumped liquid. Small
quantities of liquid are therefore drained via the drain hole.
•
Whether the sound pressure level has changed.
We recommend that you write the operating data in the log book
supplied with the pump. The data can be useful for maintenance
purpose. The log books are shown on pages
11. Limitations to operation, BM hp circulation
pump
The flow limits stated in the table below apply to the optimum
operating ranges of the pumps as regards efficiency and cooling:
Recommended flow rates at 25 °C (77 °F)
3
m
Type of BM hp
50 Hz
BM 17
8-24
BM 30
15-38
BM 46
24-60
BM 60
35-75
BM 77
50-95
BM 95
60-110
BM 125
70-160
BM 160
140-195
BM 215
160-265
11.1 Cooling
The temperature and flow limits stated in the table below must be
observed to ensure sufficient cooling of the motor:
Maximum permissible liquid temperature
Maximum
liquid
temperature
Motor
°C
°F
Grundfos MS 6"
40
104
12. Pulleys and
V-belts.
172
to 174.
/h
US GPM
60 Hz
50 Hz
60 Hz
8-29
35-106
35-128
18-45
66-167
79-198
28-72
106-264
123-317
40-90
154-330
176-396
70-110
220-418
308-484
80-125
264-484
352-550
80-180
308-704
352-792
150-215
616-858
660-946
200-310
704-1166
880-1364
Minimum
flow velocity
Minimum
past the
flow
motor
3
m
/h (US
m/s (ft/s)
GPM)
≥ 0.15 (0.49)
≥ 5.5 (24)
13
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