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3.2 BITZER water cooled oil coolers
BITZER offers the following external water cooled oil coolers:
• OW401
• OW501
• OW781
• OW941
A seawater cooled version is also available for each:
• OW401B
• OW501B
• OW781B
• OW941B
Performance data
Oil cooler
Weight [kg]
OW401
38
OW501
42
OW781
60
OW941
75
Tab. 2: Performance data of the water cooled oil coolers OW401 .. 941, part 1
(1): Oil side: max. pressure 28 bar, temperature range -10 .. 120°C
(2): Coolant side: max. pressure 10 bar, temperature range -10 .. 95°C. Use frost protection if necessary!
Oil
Water inlet / outlet
Oil
temp.
cooler
(inlet)
[°C]
Q
[kW]
OW401
80
17
100
24
OW501
80
22.5
100
32
OW781
80
31
100
44
OW941
80
42
100
60*
Tab. 3: Performance data of the water cooled oil coolers OW401 .. 941, part 2
Q: Rated capacity
V: Coolant volume flow
Δp: Pressure drop at water inlet / outlet temperature
Performance data is based on:
4 pass: OW401 / OW501 (standard)
6 pass: OW781 / OW941 (standard)
except (*): Data is based on
2 pass: OW401 / OW501
3 pass: OW781 / OW941
ST-140-1 // PDF Download
Volume oil cooler oil side (1)
3
[dm
]
10.5
14
18
24
Water inlet / outlet
temp.
15 / 25°C
27 / 32°C*
V
Δp
Q
3
[m
/h]
[bar]
[kW]
1.5
0.13
13
2.1
0.25
21
1.9
0.24
17
2.7
0.45
28
2.7
0.13
24
3.8
0.25
38
3.6
0.28
32
5.1*
0.1*
52
Volume oil cooler coolant side
3
(2) [dm
]
2.2
2.6
4.5
5.4
Water inlet / outlet
temp.
40 / 50°C
V
Δp
Q
V
3
[m
/h]
[bar]
[kW]
[m
2.2
0.04
8
0.7
3.6
0.1
16
1.4
2.9
0.08
11
0.9
4.8
0.2
21
1.8
4.1
0.04
15
1.3
6.5
0.1
29
2.5
5.5
0.09
20
1.7
8.8
0.22
39
3.3
Water inlet / outlet
temp.
50 / 60°C
Δp
Q
3
/h]
[bar]
[kW]
0.03
4.5
0.12
12
0.06
6
0.22
16
0.03
8.5
0.12
23
0.07
11.5
0.22
30
No. of com-
pressors
max. 1
max. 1
max. 2
max. 2
temp.
V
Δp
3
[m
/h]
[bar]
0.4
0.02
1.0
0.06
0.5
0.03
1.4
0.13
0.7
0.01
2.0
0.07
1.0
0.02
2.6
0.15
47
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