CAT: BFP/VCAR
STU
STU
STB
STU/STB
IE/STU-STB/002/2014 SHEET: 1/1
ST* ** 00 *
12
MAX 20 Nm (*)
C
C
M
L
ØD
A1 A
N(max)
H
F
E
G
2
max 0.5 Nm
STU
Q (l/min)
P(bar)
0
0
5
10 15 20 25 30 35 40
45 50
5
6
7
8
9
1
2
3
4
10
11
12
13
14
15
0600
0800
0400
Q (l/min)
P(bar)
0
0
20
40 60 80 100 120 140 160
2
4
6
8
10
14
12
1200
1600
Q (l/min)
P(bar)
0
0
5
10 15 20 25 30 35 40
45 50
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0600
0800
0400
Q (l/min)
P(bar)
0
0
20
40 60 80 100 120 140 160
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
1600
1200
A A1
A A1
A
A1
A1 A
STB
A
A1
A
A1
UNIDIRECTIONAL AND BIDIRECTIONAL FLOW CONTROL VALVES - IN-LINE MOUNTING
HYDRAULIC SYMBOLS
HYDRAULIC FEATURES
Hydraulic fluid
DIN 51524 Mineral oils
Fluid viscosity 10 ÷ 500 mm
2
/s
Fluid temperature -25°C ÷ 75°C
Ambient temperature -25°C ÷ 60°C
Max. contamin. level class with filter
ISO 4406:1999 - class 19/17/14
Series
Size
ORDERING CODE
FLOW CONTROL VALVES
* Performance pressure are guaranteed if you do not exceed the maximum tightening torque
PRESSURE DROPS
STU = Unidirectional flow control valve
STB = Bidirectional flow control valve
00 = Serial N.o.
G = with nut
(If not required omit)
Completely open valve
Completely closed valve
Code C
Flow
max (l/min)
Pressure
max (bar)
L - STU
(mm)
L - STB
(mm)
H
(mm)
D
(mm)
E
(mm)
F
(mm)
G
(mm)
M
(mm)
N max
(mm)
Weight
- STU
(kg)
Weight
- STB
(kg)
Weight screw
(kg)
STU-STB 0400
1/4 BSP 20 400 73 54 68.5 31.5 20 M20x1 6 27 7 0.26 0.21 0.020
STU-STB 0600
3/8 BSP 30 400 82 62 80.5 35.5 25 M25x1.5 9.5 31 7 0.44 0.37 0.031
STU-STB 0800
1/2 BSP 50 350 98 73 93 41 30 M30x1.5 8 36.5 9 0.73 0.59 0.043
STU-STB 1200
3/4 BSP 85 320 112 84 110 47 40 M35x1.5 13 42 11 1.36 1.10 0.067
STU-STB 1600
1 BSP 150 300 142 100 121.5 47 45 M40x1.5 11.5 50 15 2 1.52 0.090
Service example
Fluid used: mineral based oil with viscosity 15 mm²/s (for STU0400 mm²/s) 32 at 40°C.
Regulation stroke
04 = 1/4 BSP
06 = 3/8 BSP
08 = 1/2 BSP
12 = 3/4 BSP
16 = 1 BSP
Flow control valve using non compensated throttling.
The flow is reduced in only one direction (A to A1) for STU valves and in both
directions for STB valves, turning the wheel with locking screw right or left.
Guarantees excellent mechanical seal with negligible leakage.
It has a galvanised steel body. The check valve tapered poppet is in tempered
and ground steel.
Page: 105
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