DIVISION
23
DIVISION
D1WWEO01A
DIVISION
Body Valves
Type
VDA
Max. ow Max. pressure
Application range with
standard springs*
Connection
pressure
Weight
aluminium
body
l/min US gpm bar psi kg lb
VDA 38 25 6.6
250
aluminium
body
3600
aluminium
body
5÷110 bar -72.5÷1600 psi
(test setting 90 bar -1300 psi
5 l/min. -1.32 US gpm)
100÷250 bar -1450÷3600
psi- (test setting 200 bar
- 2900 psi- 5 l/min. -1.32 US
gpm)
15% of the valve
setting pressu-
re for standard
valves, ask our
technical ofce for
special valves
2,15 4.74
VDA 12 50 13.2 2,35 5.18
VDA 34 100 26 3,20 7.05
*To perform setting of the valve see the pressure drop/ow diagram.
AUTOMATIC CUT-OFF VALVES
Type VDA
Operation
Allows for pump discharge when the setting pressure is reached in U. Later the valve
keeps constant pressure in U by means of the accumulator in.
Performance
24
DIVISION
D1WWEO01A
Dimensions and hydraulic circuit
Rating diagrams
Order code
DIVISION
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
5
5 10 15 20 25 30 35
Q [l/min]
p [bar]
0
5
10
15
20
25
30
35
40
10 15 20 25 30 35
Q [l/min]
p [bar]
0 2 4 6
8
(US gpm)
0 2 4 6
8
(US gpm)
0
400
500
300
200
100
(psi)
0
50
60
70
40
20
30
10
(psi)
5
Typical Pressure drop vs. Flow characteristic P T
Typical Pressure drop vs. Flow characteristic P U
VDA 38 / . S / 
Body material
_
ac
Aluminium
Steel
Pressure settings
TV)
TR)
5÷110
100÷250
bar
bar
Type VDA 38
Automatic cut-off valve
0.75
3.74
(72.5÷1600 psi)
(1450÷3600 psi)
Ø 0.33
0.43
0.47
1.57
1.18
0.47
4.72
2.36
0.94
0.710.71
0.98
2.20 1.53
DIVISION
25
DIVISION
D1WWEO01A
DIVISION
Rating diagrams
Order code
Dimensions and hydraulic circuit
0
5
10
15
20
25
30
10 15 20 25 30 35 40 45 50 55 60
Q [l/min]
p [bar]
0
0,5
1
1,5
2
2,5
3
3 5
4
4,5
5
5,5
6
6,5
7
7,5
8
10 15 20 25 30 35 40 45 50 55 60
Q [l/min]
p [bar]
0 2 4 6 8 10 12 14
(US gpm)
0 2 4 6 8 10 12 14
(US gpm)
0
300
400
200
100
(psi)
0
20
40
60
80
100
(psi)
5
5
Typical Pressure drop vs. Flow characteristic P U
Typical Pressure drop vs. Flow characteristic P T
VDA 12 / . S / 
Body material
_
ac
Aluminium
Steel
Pressure settings
TV)
TR)
5÷110
100÷250
bar
bar
Type VDA 12
Automatic cut-off valve
(72.5÷1600 psi)
(1450÷3600 psi)
0.51
4.25
Ø 0.33
0.47
1.65
1.65
0.43
0.75
1.180.43
0.75
2.36
1.53
2.20
0.98
4.72
26
DIVISION
D1WWEO01A
Dimensions and hydraulic circuit
Rating diagrams
Order code
DIVISION
0
1
2
3
4
5
6
7
8
9
10
11
10010 20 110
Q [l/min]
p [bar]
0
3
6
9
12
15
Q [l/min]
p [bar]
0 5 10 15
20 25
(US gpm)
0 5 10 15
20 25
(US gpm)
0
200
100
150
50
(psi)
0
150
100
50
(psi)
5030 40 80 9060 70 10010 20 1105030 40 80 9060 70
Typical Pressure drop vs. Flow characteristic P T
Typical Pressure drop vs. Flow characteristic P U
VDA 34 / . S / 
Body material
_
ac
Aluminium
Steel
Pressure settings
TV)
TR)
5÷110
100÷250
bar
bar
Type VDA 34
Automatic cut-off valve
(72.5÷1600 psi)
(1450÷3600 psi)
2.36
1.29
4.72
3.31
0.35
Ø 0.33
0.35
0.39
1.77
2.12
0.79
0.88 2.74 2.09
5.71