Operation; Maximum Flow Rates; General Information - BOWMAN EC Series Installation, Operation, Maintenance Manual

3. Operation

Take Care
Sea Water Application (Maximum 2 m/s)
Type
Max Recommended Flowrate (I/min)
EC range
FC range
FG range
GL range
GK range
JK range
PK range
RK range
Fresh water Application (Maximum 3 m/s)
Type
Max Recommended Flowrate (I/min)
EC range
FC range
FG range
GL range
GK range
JK range
PK range
RK range

3.2 General information

The oil cooler should be pressurized on the oil (shell) side such that it is at a higher pressure than
the water (tube) side. This will ensure that if a leak occurs it will be detected by a reduction in the
oil level and the oil will not be contaminated. A differential pressure of 2 bar would be sufficient. It
is essential that the following instructions are followed to prevent corrosion/erosion of the heat
exchanger:
a) Always maintain the water pH to within correct levels. The ideal water pH should be kept
within 7.4 to 7.6. On no account should it be below 7.2 or above 7.8.
b) Minimum water velocity of 1m/s should be used.
c) Ensure compliance with water quality and maximum permissible pressure requirements.
d) Air must be adequately vented from both circuits.
e) Stagnant water should not be allowed to accumulate in the oil cooler. If it is not in use
for any period of time the water should be drained off.
3.1 Maximum water flow rates
The following tables give maximum flow rates through the tube stack for either
single, two or three pass configuration, using either sea or fresh water.
3-Pass
50
80
110
200
300
400
650
900
3-Pass
75
135
180
320
460
660
1000
1400
2-Pass
Max Recommended Flowrate (I/min)
80
120
170
290
450
600
1000
1400
2-Pass
Max Recommended Flowrate (I/min)
120
200
270
470
690
1000
1500
2150
1-Pass
Max Recommended Flowrate (I/min)
170
230
320
560
900
1200
2000
2800
1-Pass
Max Recommended Flowrate (I/min)
255
380
530
900
1400
2000
3000
4300
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