4
L4383
4.0 AIR CONSUMPTION SPECIFICATION
Air consumption is approximately 28 CFM (Cubic Feet per
Minute) of free air at 100 psi, for an oil discharge pressure
of 25000 psi. At lower air pressures and higher hydraulic
pressures, air consumption will be reduced proportionally
to the flow rates indicated.
Approximate Air to Hydraulic Pressure Ratios – Static Conditions
AIR PRESSURE
(PSI)
10
20
30
40
50
60
70
80
90
100
HYD. PRESSURE
(x1000 PSI)
3
6
9.5
12.6
16
19.1
22.3
25.6
29
32.3
AIR PRESSURE
(BAR)
0.7
1.4
2.1
2.8
3.5
4.2
4.9
5.6
6.3
7.0
HYD. PRESSURE
(BAR)
2.7
414
655
869
1103
1317
1538
1766
2000
2228
AIR PRESSURE
(MPa)
0.07
0.14
0.21
0.28
0.35
0.42
0.49
0.56
0.63
0.7
HYD. PRESSURE
(MPa)
20.7
41.1
65.5
86.9
110.3
131.7
153.8
176.6
200
222.8
Approximate Air to Hydraulic Pressure Ratios – Static Conditions
CIPM (Cubic Inch per Minute) and CCMPM (Cubic Centimetres per minute)
OIL DISCHARGE
PRESSURE
AIR VENT PRESSURE
60 PSI
80 PSI
100 PSI
6000 PSI
43CIPM
51
54
9000 PSI
38
46
49
12500 PSI
31
40
44
15000 PSI
27
37
40
20000 PSI
0
30
34
25000 PSI
0
10
28
OIL DISCHARGE
PRESSURE
AIR VENT PRESSURE
4Bar
5.5Bar
7Bar
414 Bar
705CCMPM
836
885
620 Bar
623
754
803
862 Bar
508
656
721
1034 Bar
443
606
656
1379 Bar
0
492
557
1724 Bar
0
164
459
OIL DISCHARGE
PRESSURE
AIR VENT PRESSURE
400000 Pa
550000 Pa
700000 Pa
41.4 MPa
705CCMPM
836
885
62.0 MPa
623
754
803
86.2 MPa
508
656
721
103.4 MPa
443
606
656
137.9 MPa
0
492
557
172.4 MPa
0
164
459
