Type VAIL and VADDL
Operation
Direct acting (differential control for the VADDL), poppet type, line moun-
ting.
Allows pressure relief on delivery pipes to engines and cylinders.
Actuator close mount is recommended to assure a more rapid valve
action.
Body Valves
Type
Max.ow Max. pres.
Application range with
standard spring*
Hysteresis
Oil
leaks
from
P to T
Weight
Cartridge
l/
min
US gpm bar psi
kg lb
VAIL 5
(38)
25
(12)
35
(38)
6.6
(12)
9.2
aluminium
body
210
steel body
350
3050
5100
5÷40 bar - 72.5÷580 psi
(test setting 30 bar - 435
psi at 5 l/min. - 1.32 US
gpm)
20÷80 bar - 290÷1150 psi
(test setting 60 bar - 870
psi at 5 l/min. - 1.32 US
gpm)
50÷220 bar -725÷3200
psi (test setting 160 bar -
2300 psi at 5 l/min. - 1.32
US gpm)
180÷350 bar - 2600÷5100
psi (test setting 280 bar -
4100 psi at 5 l/min. - 1.32
US gpm)
85% of the
setting
value for
ow
capacity
1 l/min.
-0.26 US
gpm-
-
alum. body
0,67
steel body
1,29
alum. body
1.48
steel body
2.84
VMP
5
VAIL 10 150 40 -
alum. body
1,12
steel body
2,20
alum. body
2.47
steel body
4.85
VMP
10
VAIL 20
(34)
100
(100)
180
(34)
26
(100)
48
350 5100 -
alum. body
2,00
steel body
3,55
alum. body
4.40
steel body
7.83
VMP
20
VADDL
38
35 9.2
aluminium
body
210
steel body
350
3050
5100
50÷210 bar - 725÷3050
psi (test setting 150 bar -
2200 psi at 5 l/min. - 1.32
US gpm)
50-350 bar -725÷5100 psi
(test setting 250 bar-3600
psi at 5 l/min. - 1.32 US
gpm)
disre-
gar-
dable
alum. body
0,86
steel body
1,50
alum. body
1.89
steel body
3.30
VMPD 38
VADDL
12
60 16
alum. body
1,14
steel body
2,00
alum. body
2.56
steel body
4.41
VMPD 12
VADDL
34 (100)
(34)
120
(100)
180
(34)
32
(100)
48
(34)
alum. body
3,38
steel body
4,77
(100)
alum. body
3,61
steel body
5,41
(34)
alum. body
7.45
steel body
10.52
(100)
alum. body
7.96
steel body
11.93
VMPD 34
*To perform setting of the valve see the pressure drop/ ow diagram.
77
DODT001E
Dual cross-line relief valves
D1
D1
D2
D2
Performance
Rating diagrams
Order code
D1
D1
D2
D2
(US gpm)
0
4000
5000
3000
2000
1000
(psi)
0
2000
2500
1500
1000
500
(psi)
0 1 2 43 5 76
(US gpm)
0 1 2 43 5 76
VAIL 5 - / . /  
Pressure settings
TB)
TV)
TS)
TR)
5÷40 bar
20÷80 bar
50÷220 bar
180÷350 bar
Adjustment
S
W
Port size
38)
12)
G 3/8
G 1
Body material
_ Aluminium
Steelac
/2
Cross section
Typical pressure drop vs. ow characteristic
Typical pressure drop vs. ow characteristic
(see pag.97)
(screw)
(capped adjustement)
1.38
4.92
0.70
0.70
4.92
0.92
0.92
2.75
0.39
0.39
Ø 0.25
-2.75 -1.34 -0.98
-2.95
-1.53 -0.96
(72.5÷580 psi)
(290÷1150 psi)
(725÷3200 psi)
(2600÷5100 psi)
78
DODT001E
Dimensional drawing and hydraulic circuit
Type VAIL 5
Dual cross-line relief valve. Direct acting, poppet type, line mounting.
Dimensions are in mm - in
0.69
-1.38
-1.48
Rating diagrams
Order code
D1
D1
D2
D2
Cross section
0
2000
2500
1500
1000
500
(psi)
0
4000
5000
3000
2000
1000
(psi)
(US gpm)
0 2 4 86 10 1412
(US gpm)
0 2 4 86 10 1412
VAIL 10 - / / .
P r e s s u r e s e t t i n g s
T B )
T V )
T S )
T R )
5÷40 bar
20÷8
0 bar
50÷220 bar
180÷350 bar
A d j u s t m e n t
S
W
P o r t s i z e
3 4 ) G 3/4
1 2 )
B o d y m a t e r i a l
_ Aluminium
Steela c
G 1/
2
Typical pressure drop vs. ow characteristic
Typical pressure drop vs. ow characteristic
(see pag.97)
(screw)
(capped adjustement)
1.57
0.79 0.79
1.97
3.54
2.64
0.98
0.33
1.10
3.23
0.98
0.98
1.10
2.64
Ø 0.33
(72.5÷580 psi)
(290÷1150 psi)
(725÷3200 psi)
(2600÷5100 psi)
79
DODT001E
Dimensional drawing and hydraulic circuit
Type VAIL 10
Dual cross-line relief valve. Direct acting, poppet type, line mounting.
1.77
0.79
Rating diagrams
Order code
D1
D1
D2
D2
Cross section
0
4000
5000
3000
2000
1000
(psi)
0
2000
2500
1500
1000
500
(psi)
(US gpm)
0 5 10 15 20
25
(US gpm)
0 5 10 15 20
25
VAIL 20 - / / .
Pressure settings
TB)
TV)
TS)
TR)
5÷40 bar
20÷80 bar
50÷220 bar
180÷350 bar
Adjustment
S
W
Body materialPort size
34)
100)
G 3/4
G 1
_ A luminium
Steelac
Typical pressure drop vs. ow characteristic
Typical pressure drop vs. ow characteristic
(see pag.97)
(screw)
(capped adjustement)
1.97
0.87
0.87
2.20
3.01
3.01
0.04
1.2
1.84
3.74
0.04
Ø 0.33
1.2
1.84
- 3.93
- 4.72
(72.5÷580 psi)
(290÷1150 psi)
(725÷3200 psi)
(2600÷5100 psi)
80
DODT001E
Dimensional drawing and hydraulic circuit
Type VAIL 20
Dual cross-line relief valve. Direct acting, poppet type, line mounting.
Dimensions are in mm - in
- 1.97
- 2.36
0.98
Rating diagrams
Order code
D1
D1
D2
D2
Cross section
0
4000
5000
3000
2000
1000
(psi)
(US gpm)
0 2 4 6 8
VADDL 38 / . S / 
Pressure settings
TS)
TR)
5÷210 bar
50÷35 0 bar
Body material
_ Alumi n ium
Steelac
Typical pressure drop vs. ow characteristic
1.18
1.181.18
1.18
2.09
2.09
0.35
3.54
2.56
0.79
0.79
0.79
0.79
0.98
0.98
0.35
2.83
0.35
0.35
(72.5÷580 psi)
(725÷5100 psi)
81
DODT001E
Dimensional drawing and hydraulic circuit
Type VADDL 38
Dual cross-line relief valve. Direct acting, poppet type, line mounting.
0.59
82
Type VADDL 12
Dimensional drawing and hydraulic circuit
D1
D1
D2
D2
Cross section
Rating diagrams
Order code
VADDL 12 / . S / 
Pressure settings
TS)
TR)
5÷210 bar
50÷35 0 bar
Body material
_ Aluminium
Steelac
Typical pressure drop vs. ow characteristic
1.38
1.22 1.22
2.242.24
2.24
3.94
2.75
0.82
1.06
1.06 0.82
0.87
0.87
0.39
0.39
0.39
3.15
0.39
Ø 0.33
(72.5÷3050 psi)
(725÷5100 psi)
Dual cross-line relief valve. Direct acting, poppet type, line mounting.
DODT001E
0.69
Rating diagrams
Order code
D1
D1
D2
D2
0 10 20 30 40
50
(US gpm)
(psi)
0
4000
5000
3000
2000
1000
VADDL / . S /  
Pressure settings
TS)
TR)
5÷210 bar
50÷350 bar
Port size
34)
100)
G 3/4
G 1
Body material
_ Alumi n ium
Steelac
Cross section
Typical pressure drop vs. ow characteristic
- 3.54
- 1.57
- 1.50
-1.06
-1.26
-1.22
- 3.94
- 1.97
- 1.97
-1.10 -1.50
-1.34
2.60 4.33
2.60
Ø 0.33
0.39
1.06
1.261.22
0.39
0.39
3.54
0.39
(72.5÷3050 psi)
(725÷5100 psi)
83
DODT001E
Dimensional drawing and hydraulic circuit
Type VADDL 34 (100)
Dual cross-line relief valve. Direct acting, poppet type, line mounting.
Dimensions are in mm - in
- 0.79
- 0.98
Type VAIL/VA and VADDL/VA
Operation
Direct acting (differential control for the VADDL/VA), poppet type, line
mounting.
The valve allows pressure relief on delivery pipes to engines and cylinders.
When the actuator is braking, two check valves allow for anti cavitation on
delivery side.
Actuator close mount is recommended to assure a more rapid valve action.
Performance
Body Valves
Type
Max.ow Max. pres.
Application range with
standard spring*
Hysteresis
Oil leaks
from
P to T
Weight
Cartridge
l/min US gpm bar psi kg lb
VAIL/VA
12
35 9.2
alum.
body
210
steel
body
300
alum.
body
3050
steel
body
4350
5÷40 bar - 72.5÷580 psi
(test setting 30 bar -435 psi
at 5 l/min. - 1.32 US gpm)
20÷100 bar - 290÷1450 psi
(test setting 70 bar -1015
psi - at 5 l/min. - 1.32 US
gpm)
50÷200 bar - 725÷2900 psi
(test setting 140 bar - 2050
psi at 5 l/min. - 1.32 US
gpm)
100÷300 bar -1450÷4350
psi (test setting 210 bar
- 3050 psi at 5 l/min. - 1.32
US gpm)
85% of the
setting
value for
ow
capacity
1 l/min.
-0.26 US
gpm-
disregar-
dable
alum.
body
1,24
steel
body
2,46
alum.
body
2.73
steel
body
5.42
VMP 12
VAIL/VA
34
80 21
alum.
body
2,20
steel
body
4,34
alum.
body
4.85
steel
body
9.57
VMP 12
VADDL/VA
38
35 9.2
5÷210 bar - 72.5÷3050 psi
(test setting 150 bar - 2200
psi at 5 l/min. - 1.32 US
gpm)
50÷350 bar - 72.5÷5100
psi- (test setting 250 bar
-3600 psi at 5 l/min.-1.32
US gpm)
alum.
body
1,14
steel
body
2,10
alum.
body
2.51
steel
body
4.63
VMPD 38
VADDL/VA
12
60 16
50÷210 bar -72.5÷3050 psi
(test setting 150 bar - 2200
psi at 5 l/min.-1.32 US gpm)
50÷250 bar - 725÷3600 psi
(test setting 250 bar 3600
psi at 5 l/min. - 1.32 US
gpm)
alum.
body
1,58
steel
body
3,10
alum.
body
3.48
steel
body
6.83
VMPD 12
VADDL/VA
34 (100)
(34)
120
(100)
180
(34)
32
(100)
48
5÷210 bar -72.5÷3050 psi
(test setting 150 bar - 2200
psi at 5 l/min. - 1.32 US
gpm)
50÷350 bar -72.5-5100 psi
(test setting 250 bar - 3600
psi at 5 l/min. - 1.32 US
gpm)
(34)
alum.
body
3,25
steel
body
6,50
(100)
alum.
body
4,10
steel
body
7,90
(34)
alum.
body
7.16
steel
body
14.33
(100)
alum.
body
9.04
steel
body
17.42
VMPD 34
*To perform setting of the valve see the pressure drop/ ow diagram.
85
DODT001E
Dual cross-line relief valves with anti cavitation
D1
D2
D1
D2
T
21.75 psi
86
Type VAIL/VA 12
Dimensional drawing and hydraulic circuit
Rating diagrams
Order code
Cross section
0 1.5 3 4.5 6 7.5
9
0 1.5 3 4.5 6 7.5
9
0
2000
2500
1500
1000
500
(psi)
0
4000
5000
3000
2000
1000
(psi)
(US gpm)
(US gpm)
VAIL/VA 12 / . S / 
Pressure settings
TB)
TV)
TS)
TR)
5÷50 bar
20÷100 bar
50÷200 bar
100÷300 bar
Body material
_ Alumi n ium
Steelac
D1 D2
D1
D2
T
Typical pressure drop vs. ow characteristic Typical pressure drop vs. ow characteristic
1.57
2.683.74
0.98
0.24
3.07
0.24
0.98 0.98
1.57
3.54
1.65
0.39
Ø 0.25
21.75 psi
(72.5÷725 psi)
(290÷1450 psi)
(725÷2900 psi)
(1450÷4350 psi)
Dual cross-line relief valves with anti cavitation.
DODT001E
1.77
0.79
Rating diagrams
Order code
Cross section
D1 D2
D1
D2
T
(US gpm)
0
4000
5000
3000
2000
1000
(psi)
(US gpm)
0 4 8 12 16 20
0 4 8 12 16 20
0
2000
2500
1500
1000
500
(psi)
VAIL/VA 34 / . S / 
Pressure settings
TB)
TV)
TS)
TR)
5÷50 bar
20÷100 bar
50÷200 bar
100÷300 bar
Body material
_ Aluminium
Steelac
Typical pressure drop vs. ow characteristic Typical pressure drop vs. ow characteristic
1.57
4.33
3.25
0.31
3.70
0.31
0.94
1.41 1.41
2.05
4.33
1.85 0.39
Ø 0.33
21.75 psi
(72.5÷725 psi)
(290÷1450 psi)
(725÷2900 psi)
(1450÷4350 psi)
87
DODT001E
Dimensional drawing and hydraulic circuit
Type VAIL/VA 34
Dual cross-line relief valves with anti cavitation.
2.16
0.79
Rating diagrams
Order code
D1 D2
D1
D2
T
Cross section
(US gpm)
0
4000
5000
3000
2000
1000
(psi)
(US gpm)
0 4 8 12 16 20
0 4 8 12 16 20
0
2000
2500
1500
1000
500
(psi)
VADDL /VA 38 / . S / 
Pressure settings
TS)
TR)
5÷210 bar
50÷350 bar
Body material
_ Aluminium
Steelac
Typical pressure drop vs. ow characteristic Typical pressure drop vs. ow characteristic
21.75 psi
1.18
0.31
3.54
1.77
0.31
0.31
0.31
3.31
0.90
2.12
0.90
1.061.06
1.42
2.05
3.94
2.05
(72.5÷580 psi)
(725÷5100 psi)
88
DODT001E
Dimensional drawing and hydraulic circuit
Type VADDL/VA 38
Dual cross-line relief valve with anti cavitation. Differential control, poppet type, line mounting.
1.65
Ø 0.33
2.91
0.59
Rating diagrams
Order code
D1 D2
D1
D2
T
Cross section
(US gpm)
0
4000
5000
3000
2000
1000
(psi)
0 2 4 6 8
VADDL /VA 12 / . S / 
Pressure settings
TS)
TR)
5÷210 bar
50÷350 bar
Body material
_ Alumi n ium
Steelac
Typical pressure drop vs. ow characteristic
1.57
2.24
3.94
2.24
0.90
2.12
0.90
3.94
0.310.31
0.31
1.81
0.31
1.18
1.18
1.57
3.30
Ø 0.33
21.75 psi
(72.5÷3050 psi)
(725÷5100 psi)
89
DODT001E
Dimensional drawing and hydraulic circuit
Type VADDL/VA 12
Dual cross-line relief valve with anti cavitation. Differential control, poppet type, line mounting.
0.79
1.65
Rating diagrams
Order code
D1 D2
D1
D2
T
0 10 20 30 40
50
(US gpm)
0
4000
5000
3000
2000
1000
(psi)
VADDL /VA / . S /  
Pressure settings
TS)
TR)
5÷210 bar
50÷350 bar
Port size
34)
100)
G 3
G 1
Body material
_ Aluminium
Steelac
Cross section
Typical pressure drop vs. ow characteristic
2.60
2.60
Ø 0.41
0.390.39
0.39
0.39
1.46
1.46
21.75 psi
(72.5÷3050 psi)
(725÷5100 psi)
90
DODT001E
Dimensional drawing and hydraulic circuit
Type VADDL/VA 34 (100)
Dual cross-line relief valve with anti cavitation. Differential control, poppet type, line mounting.
- 4.72
- 5.11 - 5.11
- 4.72 - 3.15
- 2.75
- 1.18
- 1.38
- 3.94
- 4.33
- 1.97
- 2.16
- 2.52
- 2.75
- 1.10
- 1.18
- 1.81
- 2.20
- 1.97
- 2.16
Dimensions are in mm - in
Hydraulic diagram
Hydraulic diagram
Hydraulic diagram
6
Type Description
Maximum ow up to Maximum pressure
Page
l/min US gpm bar psi
VAIL
Dual cross-line relief
valve. Direct acting,
poppet type, line
mounting.
180 48 350 5100 77
VADDL
Dual cross-line relief
valve. Differential
control, poppet type,
line mounting
Type Description
Maximum ow up to Maximum pressure
Page
l/min US gpm bar psi
VAIL/VA
Dual cross-line relief
valve. Direct acting,
poppet type, line
mounting.
80 21 300 4350
85
VADDL/VA
Dual cross-line
relief valve with anti
cavitation. Differential
control, poppet type,
line mounting
180 48 350 5100
Type Description
Maximum ow up to Maximum pressure
Page
l/min US gpm bar psi
VAA/RU/DL
Antishock valve with
anti cavitation and
single pressure adju-
stment. Differential
control, poppet type
line mounting
180 48 350 5100 91
DODT001E
Index
Pressure relief valves