299
FLOW CONTROLS
Restrictors
One Way Restrictors
Restrictors / One Way Restrictors
D
Valve Name
SRT-03-50/5080/5090
SRT-06-50/5080/5090
SRT-10-50/5080/5090
SRCT-03-50/5080/5090
SRCT-06-50/5080/5090
SRCT-10-50/5080/5090
Restrictor
One Way Restrictor
Model Numbers
Threaded Connection Sub-plate Mounting
Max.
Operating
Pres.
MPa (PSI)
L/min
(U.S.GPM)
Rated Flow
Threaded
Connection
Sub-plate
Mounting
Approx. Mass
kg (lbs.)
30 (7.9)
85 (22.4)
230 (60.7)
30 (7.9)
85 (22.4)
230 (60.7)
1.5 (3.3)
3.8 (8.4)
9.1 (20.1)
1.5 (3.3)
3.8 (8.4)
9.1 (20.1)
SRG-03-50/5090
SRG-06-50/5090
SRG-10-50/5090
SRCG-03-50/5090
SRCG-06-50/5090
SRCG-10-50/5090
25 (3630)
25 (3630)
2.5 (5.5)
3.9 (8.6)
7.5 (16.5)
2.5 (5.5)
3.9 (8.6)
7.5 (16.5)
Rated flow stands for approximate flow rate when the pressure
drop between inlet and outlet ports of the valve in fully opened
condition becomes 0.3 MPa (44 PSI) maximum at fluid's specific
gravity of 0.85 and kinematic viscosity of 20 mm
2
/s (98 SSU).
Max. Operating
Pressure
MPa (PSI)
Rated Flow
L/min
(U.S.GPM)
Model Numbers
SRF/SRCF-10-50
SRF/SRCF-10-5090
25 (3630)
SRF/SRCF-16-50
SRF/SRCF-16-5090
230 (60.7)
500 (132)
Yuken can offer flanged connection valves described below.
For details, contact us.
Special Seals
for Phosphate
Ester Type
Fluids
(Omit if not
required)
F:
03
06
10
03
06
10
03
06
10
03
06
10
Restrictor
SR:
One Way
Restrictor
SRC:
Threaded Connection
T:
Sub-plate Mounting
G:
Threaded Connection
T:
Sub-plate Mounting
G:
50
50
50
50
50
50
50
50
50
50
50
50
F- SR
Special Seals Series Number
T
Type of Mounting
-50
Design Number Design Standards
-03
Valve Size
None:
Japanese Std. "JIS"
80:
European Design Std.
90:
N.American Design Std.
None:
Japanese Std. "JIS"
80:
European Design Std.
90:
N.American Design Std.
None:
Japanese Std. "JIS" &
European Design Std.
90:
N.American Design Std.
None:
Japanese Std. "JIS" &
European Design Std.
90:
N.American Design Std.
Model Number Designation
Specifications
Restrictors / One Way Restrictors
This valve is used to regulate an actuator speed in a circuit where line pressure is almost steady and small fluctuation
of oil flow due to pressure changes is permitted. Integrated check valve allows reversed free flow from outlet to inlet
port. Pressure balanced construction provides less effort in adjustment at high pressure.
Graphic Symbols
SRT/SRG SRCT/SRCG
SRT/SRG SRCT/SRCG
Restrictors / One Way Restrictors
300
DIMENSIONS IN
MILLIMETRES (INCHES)
SRT/SRCT-03-50/5080/5090
SRT/SRCT-06-50/5080/5090
SRT/SRCT-10-50/5080/5090
Flow Adjustment Handle
INC.
56
(2.20)
D
C
Fully Extended
F
H
"
E
" Dia.
Controlled Flow Inlet or
Reversed Free Flow Outlet Port
"
N
" Thd.
Controlled Flow Outlet or
Reversed Free Flow Inlet Port
"
N
" Thd.
K
L
J
Dia.
Lock Nut
19(.75)
Hex.
SRT/SRCT-03-50
SRT/SRCT-03-5080
SRT/SRCT-03-5090
SRT/SRCT-06-50
SRT/SRCT-06-5080
SRT/SRCT-06-5090
SRT/SRCT-10-50
SRT/SRCT-10-5080
SRT/SRCT-10-5090
Rc 3/8
3/8 BSP.F
3/8 NPT
Rc 3/4
3/4 BSP.F
3/4 NPT
Rc 1-1/4
1-1/4 BSP.F
1-1/4 NPT
"
N
" Thd.
Thd. Size
Model Numbers
Dimensions mm (Inches)
CDE FH J KL
72
(2.83)
100
(3.94)
138
(5.43)
36
(1.42)
50
(1.97)
69
(2.72)
44
(1.73)
58
(2.28)
80
(3.15)
150.5
(5.93)
180
(7.09)
227
(8.94)
53.5
(2.11)
66.5
(2.62)
86
(3.39)
38
(1.50)
62
(2.44)
80
(3.15)
46
(1.81)
64
(2.52)
82
(3.23)
22
(.87)
31
(1.22)
40
(1.57)
Dia.
Sq.
Sq.
Attachment
Mounting Bolts
Sub-plate
Instructions
Flow Adjustment
Valve Model
Numbers
SRG/SRCG-03
SRG/SRCG-06
SRG/SRCG-10
Socket Head Cap Screw
Japanese Std. "JIS" and
European Design Std.
N. American Design Std.
Qty.
M10 45 Lg.
M10 50 Lg.
M10 55 Lg.
3/8-16 UNC 1-3/4 Lg.
3/8-16 UNC 2 Lg.
3/8-16 UNC 2-1/4 Lg.
4
4
6
1.6 (3.5)
1.6 (3.5)
2.4 (5.3)
3.0 (6.6)
4.8 (10.6)
5.7 (12.6)
Valve
Model
Numbers
-03
SRG
SRCG
-06
SRG
SRCG
-10
SRG
SRCG
Japanese Standard "JIS"
Sub-plate
Model Numbers
Thread
Size
European Design Standard
Sub-plate
Model Numbers
Thread
Size
N. American Design Standard
Sub-plate
Model Numbers
Thread
Size
Approx. Mass
kg (lbs.)
CRGM-03-50
CRGM-03X-50
CRGM-06-50
CRGM-06X-50
CRGM-10-50
CRGM-10X-50
Rc 3/8
Rc 1/2
Rc 3/4
Rc 1
Rc 1-1/4
Rc 1-1/2
CRGM-03-5080
CRGM-03X-5080
CRGM-06-5080
CRGM-06X-5080
CRGM-10-5080
CRGM-10X-5080
3/8 BSP.F
1/2 BSP.F
3/4 BSP.F
1 BSP.F
1-1/4 BSP.F
1-1/2 BSP.F
CRGM-03-5090
CRGM-03X-5090
CRGM-06-5090
CRGM-06X-5090
CRGM-10-5090
CRGM-10X-5090
3/8 NPT
1/2 NPT
3/4 NPT
1 NPT
1-1/4 NPT
1-1/2 NPT
Sub-plates are available. Specify the sub-plate model number from the table above. When sub-plates are not used, the mounting surface
should have a good machined finish.
Sub-plates are common with right angle check valves. For dimensions, see page 502.
Slacken the lock nut and turn the flow adjustment
handle anti-clockwise to throttle flow. After achieving
satisfactory performance tighten the lock nut.
301
FLOW CONTROLS
Restrictors
One Way Restrictors
Restrictors / One Way Restrictors
D
Mounting surface: ISO5781-AG-06-2-A
Mounting surface: ISO5781-AH-08-2-A
DIMENSIONS IN
MILLIMETRES (INCHES)
SRG/SRCG-03-50/5090
SRG/SRCG-06-50/5090
56
(2.20)
Dia.
Flow Adjustment Handle
INC.
Controlled Flow Outlet or
Reversed Free Flow Inlet Port
Fully Extended
150.5(5.93)
42.9
(1.69)
32
(1.26)
31
(1.22)
Controlled Flow Inlet or
Reversed Free Flow Outlet Port
11(.43)
Dia. Through
17.5(.69)
Dia. Spotface
4 Places
11.7
(.46)
33.3
(1.31)
66.7
(2.63)
90
(3.54)
Mounting Surface
(O-Rings Furnished)
Locating Pin
6(.24)
Dia.
6
(.24)
64
(2.52)
30
(1.18)
Lock Nut
19(.75)
Hex.
56
(2.20)
Dia.
Flow Adjustment Handle
INC.
Controlled Flow Outlet or
Reversed Free Flow Inlet Port
Fully Extended
180(7.09)
60.3
(2.37)
36.5
(1.44)
37
(1.46)
Controlled Flow Inlet or
Reversed Free Flow Outlet Port
11(.43)
Dia. Through
17.5(.69)
Dia. Spotface
4 Places
11.3
(.44)
39.7
(1.56)
79.4
(3.13)
102
(4.02)
Mounting Surface
(O-Rings Furnished)
Locating Pin
6(.24)
Dia.
6
(.24)
79
(3.11)
36
(1.42)
35
(1.38)
Lock Nut
19(.75)
Hex.
Note: For dimensions of the valve mounting surface, see the dimensional drawing (P.502) of the sub-plate used together.
Note: For dimensions of the valve mounting surface, see the dimensional drawing (
P.502) of the sub-plate used together.
Restrictors / One Way Restrictors
302
DIMENSIONS IN
MILLIMETRES (INCHES)
Mounting surface: ISO 5781-AJ-10-2-A
SRG/SRCG-10-50/5090
Note: For dimensions of the valve mounting surface, see the dimensional drawing (P.502) of the sub-plate used together.
Flow Adjustment Handle
INC.
42
(1.65)
Mounting Surface
(O-Rings Furnished)
Locating Pin
6(.24)
Dia.
6
(.24)
90
(3.54)
41
(1.61)
40
(1.57)
56
(2.20)
Dia.
Controlled Flow Outlet or
Reversed Free Flow Inlet Port
Fully Extended
227(8.94)
84.1
(3.31)
44
(1.73)
Controlled Flow Inlet or
Reversed Free Flow Outlet Port
11(.43)
Dia. Through
17.5(.69)
Dia. Spotface
6 Places
11.1
(.44)
48.4
(1.91)
96.8
(3.81)
119
(4.69)
42.1
(1.66)
Lock Nut
19(.75)
Hex.
303
FLOW CONTROLS
Restrictors
One Way Restrictors
Restrictors / One Way Restrictors
D
Hydraulic Fluid: Viscosity 30 mm
2
/s (141 SSU), Specific Gravity 0.850
Hydraulic Fluid: Viscosity 30 mm
2
/s (141 SSU), Specific Gravity 0.850
Metred Flow vs Adjustment Handle Revolutions
Pressure Drop
Flow Rate
45
40
30
20
10
0
Flow Rate
U.S.GPM
L/min
11
10
8
6
4
2
0
P=16 (2320)
P=20 (2900)
P=25 (3630)
01234567
P=10 (1450)
P=7 (1020)
P=4 (580)
P=2 (290)
P=1 (145)
P=0.5 (70)
Fully Open
Adj. Handle Position (Number of turns)
0
Flow Rate
U.S.GPM
L/min
30
25
20
15
10
5
0
120
100
80
60
40
20
Fully Open
Adj. Handle Position (Number of turns)
012345678910
P=7 (1020)
P=10 (1450)
P=16 (2320) P=20 (2900)
P=25 (3630)
P=4 (580)
P=2 (290)
P=1 (145)
P=0.5 (70)
Fully Open
Adj. Handle Position (Number of turns)
024 6 8101214
0
U.S.GPM
L/min
0
10
20
30
40
50
60
70
80
90
300
250
200
150
100
50
350
P=10 (1450)
P=16 (2320) P=20 (2900)
P=25 (3630)
0
40
45
10
20
30
0246810
12
Flow Rate
Pressure Drop
0
0.1
0.2
0.3
0.4
0
10
20
30
40
50
U.S.GPM
L/min
MPa
PSI
Free Flow
Spool Closed
Controlled Flow
Flow Rate
U.S.GPM
L/min020 40 60 80100120
051015 20 25 30
Pressure Drop
0
0.1
0.2
0.3
0.4
MPa
PSI
0
10
20
30
40
50
Free Flow
Spool Closed
Controlled Flow
Spool Fully Open
0
0
Flow Rate
U.S.GPM
L/min
100 200 300 350
20 40 60 80 90
0
MPa
0.1
0.2
0.3
0.4
0.5
Pressure Drop
PSI
0
10
20
30
40
50
60
70
P:
Differential Pressure
MPa (PSI)
SRT
SRG
SRCT
SRCG
-03, -03
SRT
SRG
SRCT
SRCG
-06, -06
SRT
SRG
SRCT
SRCG
-10, -10
SRT
SRG
SRCT
SRCG
-03, -03
SRT
SRG
SRCT
SRCG
-06, -06
SRT
SRG
SRCT
SRCG
-10, -10
Applicable only for one way restrictor (Model No. SRC
*
)
P=4 (580)
P=2 (290)
P=1 (145)
P=0.5 (70)
P=7 (1020)
Spool Fully Open
Free Flow
Spool Closed
Controlled Flow
Spool Fully Open
Restrictors / One Way Restrictors
304
List of seals
SRG/SRCG-03-50/5090
SRG/SRCG-06-50/5090
SRG/SRCG-10-50/5090
SRT/SRCT-03-50/5080/5090
SRT/SRCT-06-50/5080/5090
SRT/SRCT-10-50/5080/5090
Item
SO-NB-P7
SO-NB-P15
SO-NB-P20
.ytQstraP fo emaN
O-Ring
O-Ring
O-Ring
1
1
1
12
13
14
Va lve Model Numbers Seal Kit Numbers
SRT/SRCT-03
SRT/SRCT-06
SRT/SRCT-10
Part Numbers
SRT
SRCT
-03
KS-SRT-03-50
KS-SRT-06-50
KS-SRT-10-50
SO-NB-P7
SO-NB-P21
SO-NB-P22.4
SRT
SRCT
-06
SO-NB-P7
SO-NB-P29
SO-NB-P36
SRT
SRCT
-10
For SRCT
17 16 10
9
4
15
5
3
2
11
18
6
7
1
8
stiK laeS fo tsiLslaeS fo tsiL
14
12
13
Note: When ordering the seals, please specify the seal kit number from the table
right.
Item
SO-NB-P7
SO-NB-P15
SO-NB-P20
SO-NB-P18
.ytQstraP fo emaN
O-Ring
O-Ring
O-Ring
O-Ring
1
1
1
2
12
13
14
15
Va lve Model Numbers Seal Kit Numbers
SRG/SRCG-03
SRG/SRCG-06
SRG/SRCG-10
Part Numbers
SRG
SRCG
-03
KS-SRG-03-50
KS-SRG-06-50
KS-SRG-10-50
SO-NB-P7
SO-NB-P21
SO-NB-P22.4
SO-NB-P28
SO-NB-P7
SO-NB-P29
SO-NB-P36
SO-NB-P32
SRG
SRCG
-10
SRG
SRCG
-06
For SRCG
10
17
18
9
4
16
5
1
2
6
11
20
7
8
19
3
stiK laeS fo tsiLslaeS fo tsiL
14
13
15
12
Note: When ordering the seals, please specify the seal kit number from the table
right.
