Orifice
G
Aroflex AG ¦ Unteräuliweg 4 ¦ CH-8560 Märstetten subject to change without notice ¦ 12/2021
www.aroflex.ch ¦ info@aroflex.ch ¦ Phone +41 71 657 19 28 Sheet No. 6.6.1.e
▪ common orifices
▪ orifices with included edge filters
Description
Orifices are also known as throttles. The throttle sec-
tion is kept as short as possible to ensure the ad-
vantage of the typical orifice, viscosity independence.
To avoid the risk of blocked orifice by dirt, use the
type with included edge filters. There is a filter gap in
front of the orifices, with a gap about
1
/
3
of the orifice
diameter. The filter gap and the thereby greatly re-
duced flow velocity help a lot to reduce the risk of
blocked orifices.
Technical Data
General Specifications
G
Design:
common orifice or orifice with included edge filter
Mounting method:
screw-in thread
Thread size:
Metric threads M3 … M8
Inch thread cylindrical G1/8” and G1/4”
Mounting position:
unrestricted
Accuracy:
±0.02mm (higher accuracy on request)
Hydraulic Specifications
Max. pressure:
Brass: 300 bar, Steel 600 bar
Fluid:
hydraulic oils HL and HLP according DIN 51524
Temperature range:
-20°C … + 100°C
Viscosity range:
10 … 500 mm²/s (cSt)
Min. fluid cleanliness
20/18/15 acc. to ISO 4406 / max. class 9 acc. to NAS 1638
Type code
G
SV
-M5
x
0.8
- ST
Material:
ST = steel
MS = brass
Orifice diameter:
øD in the chart
Thread size:
M3, M4, M5, M6, M7, M8 (other sizes on request)
G1/8” and G1/4” (only full thread orifice possible)
omit = common orifice, without edge filter
V = edge filter in screw direction in front (steel only)
H = edge filter in screw direction in back (steel only)
G = full thread
B = with shaft
J = with cylinder head
Option:
Other dimensions and materials on request.
Orifice
G
Aroflex AG ¦ Unteräuliweg 4 ¦ CH-8560 Märstetten subject to change without notice ¦ 12/2021
www.aroflex.ch ¦ info@aroflex.ch ¦ Phone +41 71 657 19 28 Sheet No. 6.6.2.e
Dimensions
Common orifices
full thread G
A
G
øD
SW (AF)
M3
3.5
0.2 - 1.2
1.5
M4
4.0 (MS 4.5)
0.2 - 2.0
2.0
M5
5.0
0.2 - 2.2
2.5
M6
6.0
0.2 - 2.7
3.0
M7
7.0
0.2 - 2.7
3.0
M8
8.0
0.2 - 3.7
4.0
G1/8"
10.0
0.2 - 4.0
5.0
G1/4"
12.0
0.2 - 4.0
6.0
with shaft B
A
C
St Ms
G
St Ms
øD
SW
St Ms
M3
6.0 6.0
3.5 3.5
0.2 - 1.2
1.5 2.0
M4
6.0 7.0
3.5 3.5
0.2 – 1.7
2.0 2.5
M5
7.5 7.0
4.0 4.0
0.2 - 2.2
2.5 2.5
M6
8.0 9.0
5.0 6.0
0.2 - 2.7
3.0 3.0
M8
11.0 10.0
6.0 6.0
0.2 - 3.7
4.0 4.0
with cylinder head J brass version
A
G
B
øF
øD
SW
M3
3.8
2.7
5.0
0.2 - 1.5
2.0
M4
4.5
3.0
6.0
0.2 - 2.0
2.5
M5
5.0
4.0
7.0
0.2 - 2.9
3.0
M6
6.0
4.0
8.0
0.2 - 3.9
4.0
M8
7.5
2.5
9.0
0.2 - 3.9
4.0
with cylinder head J steel version
A
G
B
øF
øD
SW
M3
4.0
2.8
5.0
0.2 - 1.7
2.5
M4
5.0
3.8
6.0
0.2 - 1.7
3.0
M5
5.0
4.0
7.0
0.2 - 2.2
3.0
M6
6.0
5.7
9.0
0.2 - 2.2
5.0
M8
8.0
7.7
11.0
0.2 - 3.7
6.0
J
G
B
J
Orifice
G
Aroflex AG ¦ Unteräuliweg 4 ¦ CH-8560 Märstetten subject to change without notice ¦ 12/2021
www.aroflex.ch ¦ info@aroflex.ch ¦ Phone +41 71 657 19 28 Sheet No. 6.6.3.e
Orifice with included edge filter
full thread GSV / GSH
A
G
øD
øE
SW (AF)
M5
7.5
0.2 - 0.8
3.0
3.0
M6
8.0
0.2 - 0.8
3.0
3.0
M8
11.0
0.2 - 1.0
5.0
4.0
with shaft BSV / BSH
A
C
G
øD
øE
SW (AF)
M5
7.5
4.0
0.2 - 0.8
3.0
3.0
M6
8.0
5.0
0.2 - 0.8
3.0
3.0
M8
11.0
6.0
0.2 - 1.0
5.0
4.0
with cylinder head JSV / JSH
A
G
B
F
øD
øE
SW (AF)
M5
5.0
4.0
7.0
0.2 - 0.8
3.0
3.0
M6
6.0
5.7
9.0
0.2 - 0.8
3.0
5.0
M8
8.0
7.7
11.0
0.2 - 1.0
5.0
6.0
Flow coefficient approx. 0.5
Density 0.9 kg/dm³
1
10
100
0.1 1 10
pressure drop
[bar]
volume flow [l/min]
GSV
GSH
