3
2 Description
Oil vapour, is oil in a gaseous form and will pass straight through coalescing filters, which are designed to remove liquid oil and oil aerosols.
The OVR uses a large bed of activated carbon adsorbent, for the removal of oil vapour and odours and provides the ultimate protection against oil
contamination in all kinds of industries, where air purity is critical. The OVR must be protected by coalescing filters upstream of the unit.
2.1 Technical Specification
Flow Data
Stated flows are for operation at 7 bar g (100 psi g / 0.7 MPa g), 35ºC (95ºF) for flows at other conditions use the correction factors below Operating Data
Model
Pipe Size
L/s
m
3
/min
m
3
/hr
cfm
OVRP300
2”
80
4.8
289
170
OVRP350
2”
163
9.8
586
345
OVRP400
2 1/2”
326
19.6
1172
690
OVRP450
2 1/2”
488
29.4
1758
1035
OVRP500
2 1/2”
651
39.2
2345
1380
OVRP550
2 1/2”
814
48.9
2931
1725
2 x OVRP550
2 1/2”
1629
97.9
5862
3451
3 x OVRP550
2 1/2”
2443
146.8
8793
5176
4 x OVRP550
2 1/2”
3257
195.8
11724
6901
5 x OVRP550
2 1/2”
4071
244.7
14656
8626
Model
Min Operating
Pressure
Max Operating
Pressure
Min Operating
Temperature
Max Operating
Temperature
Max Ambient
Temperature
bar g
psi g
bar g
psi g
o
C
o
F
o
C
o
F
o
C
o
F
OVRP
1
15
16
232
2
35
50
122
55
131
Correction Factors Temperature (CFT)
Correction Factors Temperature (CFT)
Oil lubricated compressors
Oil free compressors
o
C
o
F
Correction Factor
o
C
o
F
Correction Factor
25
77
1.00
25
77
1.00
30
86
1.00
30
86
1.00
35
95
1.00
35
95
1.00
40
104
1.25
40
104
1.02
45
113
1.55
45
113
1.04
50
122
1.90
50
122
1.05
Correction Factors Pressure (CFP)
bar g
psi g
Correction Factor
3
44
2.00
4
58
1.60
5
73
1.33
6
87
1.14
7
100
1.00
8
116
1.00
9
131
1.00
10
145
1.00
11
160
1.00
12
174
1.00
13
189
1.00
14
203
1.00
15
218
1.00
16
232
1.00
Correction Factors - Inlet Dewpoint (CFD)
CDD Dewpoint
o
C
o
f
Correction Factor
Dry
-70 to +3
-100 to +38
1.00
Wet
+3 and above
+38 and above
4.00
It is assumed inlet oil vapour concentration does not exceed 0.05mg/m3 at 35°C (95°F).
For applications with higher oil vapour concentrations, please contact Parker for accurate sizing.
Filter Selection - Grade OVR
To correctly select an OVR oil vapour removal filter, the flow rate of the OVR must be adjusted for the minimum operating pressure,
maximum operational temperature and pressure dewpoint of the system.
3
Obtain the minimum operating pressure, maximum inlet temperature, maximum compressed air flow rate and dewpoint of the
compressed air at the inlet of the OVR.
4
Select correction factor for maximum inlet temperature from the CFT table to compressor type (always round up e.g. for 37°C use
40°C correction factor).
5
Select correction factor for minimum inlet pressure from the CFP (always round down e.g. for 5.3 bar use 5 bar correction factor).
6
Select correction factor for pressure dewpoint from the CFD table.
7
Calculate minimum filtration capacity.
Minimum filtration Capacity = Compressed Air Flow x CFT x CFP x CFD
8
Using the minimum filtration capacity, select an OVR model from the flow rate tables above (OVR selected must have a flow rate
equal to or greater than the minimum filtration capacity).
If the minimum filtration capacity exceeds the maximum values of the models shown within the tables, please contact Parker for
advice regarding larger multi-banked units.
