Datasheet

12
468
20
10
5
4
3
2
1
20
10
5
4
3
2
1
10
5
4
3
2
1
12
9
8
6
5
4
12
9
8
6
5
4
12
9
8
6
5
4
12
9
8
6
5
4
C
D
0.3
0.3
0.4
0.5
1.5
0.2
0.4
0.5
0.3
0.2
0.1
0.05
0.04
0.03
0.02
2.5
2.5
7.5
7.5
0.01
0.005
0.4
0.5
0.2 0.3
0.8
0.4 0.5 0.6 0.7
Subject to change
SI UNITS, SYMBOLS AND DIMENSIONING
Chart 2 – air tubing air consumption per cycle
Air consumption for air tubing
5. Use chart 2 and nd the point where the working
pressure line (0.5 MPa) crosses the line for air
tubing length (2 m). See point C.
6. From point C, go straight up until you cross the
line for air tubing inner diameter (6 mm). See
point D.
7. From there, go horizontally to the right or the left
and nd air consumption per cycle (Q
t
) = 0.56 l
n
.
8. Since there are ve working cycles per minute,
multiply the air consumption per cycle (Q
t
) with 5
to get the actual average air consumption (Q
v
).
Q
v
= Q
t
 number of cycles per minute
Q
v
= 0.56 l
n
/min  5
Q
v
= 2.8 l
n
/min
Total air consumption
The total average air consumption (Q) for the cyl-
inder and air line is obtained by adding the two
Q
v
values.
Q = Q
v
cylinder + Q
v
air tubing
Q = 65 l
n
/min + 2.8 ln/min
Q = 67.8 l
n
/min
Formulas
The average air consumption can also be calculated
by the following formulas:
Average air consumption for cylinder
Average air consumption for air tubing
Q = Air consumption (l
n
/min)
D = Cylinder bore (mm)
H = Stroke (mm)
ID = Air tubing inner diameter (mm)
L = Air tubing length (mm)
p = Working pressure (MPa)
n = Number of single strokes per minute
Air consumption – or ow – indicated
in normal liters per minute (l
n
/min).
1 normal liter is 1 dm
3
air at “room
environment” (normal atmospheric
pressure, temperature 20 °C and
a relative humidity of 65%).
Working pressure (MPa)
Air tubing length (m) Air consumption per cycle (l
n
)
Air consumption per cycle (l
n
)
Air tubing inner diameter (mm)
D
2
· 4 · H · (p + 0.1) · n
10
5
π
Q =
ID
2
· 4 · L · p · n
10
5
π
Q =