Datasheet

12
469
0.5
0.2 0.3 0.4 0.5 0.7
0.8 0.6
Subject to change
SI UNITS, SYMBOLS AND DIMENSIONING
Chart 3 – cylinder maximum air ow
Maximum air ow
How to calculate the maximum air ow
in cylinders and air tubing.
I
t is necessary to know the maximum air ow in
order to determine the size of the FRL, valves,
tubings, and more. If the components are too
small, the maximum/required cylinder speed is not
achieved.
Here we show how to use the chart on this page
to calculate the maximum air ow for a cylinder.
Example:
Cylinder bore: 63 mm
Average piston speed: 355 mm/s
Working pressure: 0.6 MPa
Maximum air ow for cylinder
1. Determine the maximum piston speed by multi-
plying the average speed of 1.41.
v max = v average 1.41
v max = 355 mm/s  1.41 = 500 mm/s
2. Use chart 3 and nd the point where the working
pressure line (0.6 MPa) crosses the line for maxi-
mum piston speed (500 mm/s). See point E.
3. From point E, go straight up until you cross the
cylinder bore line (63 mm). See point F.
4. From point F, go horizontally left or right and nd
the maximum air ow (Q) = 620 l
n
/min.
Formulas
The maximum air ow can also be calculated using
the following formulas:
Maximum air ow for cylinder
Maximum air ow for air tubing
Q = Air ow (l
n
/min)
D = Cylinder bore (mm)
ID = Air tubing inner diameter (mm)
p = Working pressure (MPa)
v = Max. speed = average speed  1.41 (mm/s)
v
l
= Max. speed of air movement in tubing
Working pressure (MPa)
Maximum piston speed (mm/s) Maximum air ow (l
n
/min)
Maximum air ow (l
n
/min)
Cylinder bore (mm)
D
2
· 4 · v · (p + 0.1) · 60
10
5
π
Q =
ID
2
· 4 · v
l
· p · 60
10
5
π
Q =
2 000
3 000
4 000
5 000
10 000
15 000
20 000
30 000
1 500
1 000
500
400
300
200
150
100
50
40
30
20
15
10
2 000
3 000
4 000
5 000
10 000
15 000
20 000
30 000
1 500
1 000
500
400
300
200
150
100
50
40
30
20
15
10
8
5
4
3
2
1
1 000
1 500
2 000
100
200
300
400
500
160
125
100
80
63
50
40
32
25
20
16
10
6
160
125
100
80
63
50
40
32
25
20
16
10
6
160
125
100
80
63
50
40
32
25
20
16
10
6
160
125
100
80
63
50
40
32
25
20
16
10
6
E
F