8
DV - 25 - P - B - SS
Nominal size DN
06 08 10 12 16 20 25 30 40 (only DRV)
Type (in-line mounting)
DV Throttle and shut-off valve
DRV Flow control valve
Housing / spindle material
(none) Steel (standard)
SS Stainless steel (1.4571)
Thread form
B BSP (standard)
N NPT (only on request)
Seal material
P NBR (standard)
V FPM
E EPDM
Ordering Code
Dimensions
Area of Application: Fluid control and flow shut-off
• DV: in both directions
• DRV: in direction A-B (free flow in reverse direction)
Characteristics/Materials:
• designed for in-line mounting
• suitable for mineral oil
• Nuts for panel-mounting are available on request
• Housing: Steel (1.0715), zinc-plated (Fe/Zn 8 C)
• Turning knob: Polyamide
Please consult our office before using with other fluids, or for
special stainless steel material.
Dimensional Table
06 G
1
/
8
1
/
8
NPT PG 7 68,0 63,0 18,0 16 24 13 3 38 19 0.12 45 26,0 0.13
08 G
1
/
4
1
/
4
NPT PG 11 83.5 77.5 27,0 25 29 19 7 48 24 0.25 55 33.5 0.30
10 G
3
/
8
3
/
8
NPT PG 11 90,0 83,0 32,0 30 29 19 7 58 29 0.40 65 41,0 0.45
12 G
1
/
2
1
/
2
NPT PG 16 109.5 99.5 38.5 35 38 23 7 68 34 0.70 73 44,0 0.80
16 G
3
/
4
3
/
4
NPT PG 16 128.5 118.5 48.5 45 38 23 7 78 39 1.20 88 57,0 1.30
20 G 1 1 NPT PG 29 174,0 157,0 55,0 50 55 38 11 108 54 2.10 127 77,0 2.40
25 G 1
1
/
4
1
1
/
4
NPT PG 29 184,0 167,0 65,0 60 55 38 11 108 54 2.80 143 93,0 3.50
30 G 1
1
/
2
1
1
/
2
NPT PG 29 194,0 177,0 75,0 70 55 38 11 108 54 3.50 143 91,0 4.60
40 G 2 2 NPT PG 29 214,0 197,0 95,0 90 55 38 11 – – – 165 111,0 7.70
Nominal
Size G1 wt. wt.
DN BSP NPT G2 H1 H2 H3 B1 D1 D2 S
max
L1 L2 (kg) L1 L 2 (kg)
DV/DRV DV DRV
øD2
S
max
G1
L2
L1
G1
L1
L2
G1
S
max
øD2
G1
89 0 12
B1
G2
H2 (closed)
H1 (open)
øD1
H3
BA
BA
Symbol Symbol
DV DV/DRV DRV
Technical Data:
max Working Pressure p
N
: 350 bar
Temperature t
max
: 100°C
Opening Pressure DRV:
0.5 bar (4.5 bar on request)
Throttle and Shut-off Valves
Flow Control Valves
In-line mounting
DV
DRV
å…¶
11
Flow Curves DV/DRV – DVP/DRVP – DVE
Throttle per revolution
0.25 1 1.5 2 2.5 3 3.5 4
0.5
100
80
60
40
20
10
5
02468101214
4.5
5
Q in l/min
p in bar
100
80
60
40
20
10
5
0.25 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
6.5
7
7.5
8
01020304050607075
Q in l/min
Throttle per revolution
p in bar
100
80
60
40
20
10
5
12
0.25
0.5 1.5
2.5 3 3.5 4 4.5 5 5.5 6
6.5 7 7.5 8
8.5
9
9.5
10
025
50 75 100 125 150 175
Q in l/min
Throttle per revolution
p in bar
p in bar
12
10
8
6
4
2
Q in l/min
0.5
14
100 200 300 400 500 600
-06 -08 -10 -12 -16 -20
-25
-30
-40
p Characteristic curve free flow through check valve
Flow direction: B–A
0.5
0.25
1 1.5 2 2.5 3 3.5 4 4.5
100
5
80
60
40
20
10
5
01020 30405060
Q in l/min
Throttle per revolution
p in bar
100
80
60
40
20
10
5
0.5
1
0.25
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9
9.5
10
0 20 40 60 80 100 120 140
Q in l/min
Throttle per revolution
p in bar
100
80
60
40
20
10
5
0.25
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
6.5
7
7.5
8
8.5
9
9.5
10
0 50 100 150 200 250 300 350
Q in l/min
Throttle per revolution
p in bar
DV/
DRV-06
DVP/
DRVP-06
DV/
DRV-08
DVP/
DRVP-08
DVE-08
DV/
DRV-12
DVP/
DRVP-12
DVE-12
DV/DRV-
20/25/30/40
DVP/DRVP-
20/25/30/40
STAUFF throttle and flow control valves are
designed to shut off and control the flow of
liquid media. The flow rate is regulated on a
direct reading device by turning the handle
from completely closed to fully open and is
set by screws.
The increase in flow is also indicated by a
colour and number scale. This is revealed on
a central spindle emerging from the turning
during operation.
The values given refer to a viscosity of 35 cSt.
DV/
DRV-10
DVP/
DRVP-10
DVE-10
DV/
DRV-16
DVP/
DRVP-16
DVE-16
DRV-
06-40
DRVP-
06-40
