1 / 8 Classification: 430.30.30.10
Reference: 100--P--000044--E--05 / 12.04
2- and 3-Way Flow Control Valves
Series SR3C
1 General
1.1 Product description
SR3C... flow control valves are used to
control the operating speed of motors
and cylinders, the speed being load--
independent i.e. pressure compensa-
ted. The flow rate is varied by means of
a slit--type orifice that is actuated by a
proportional solenoid.
The valve can be used as either a
2--way or 3--way flow control. When
used as a 3--way valve, either the con-
trolled flow (priority) port or the surplus
flow port can be at the higher pressure.
The special orifice layout ensures that
the flow setting is largely independent
of the viscosity of the operating fluid.
Thanks to the cartridge design, a com-
plete valve can be replaced very
quickly when necessary.
1.2
Advantages
S compact design
S flow rates are unaffected by tempe-
rature changes
S flow rates are unaffected by reversal
of the pressure differential between
the outlet ports
S where customers manufacture their
own manifold blocks, the flow control
valves can be ordered separately
S easy to service
S several types of manual overrides
S reliable
2 Symbols
2.1 2-way flow controller
PA
2.2 3-way flow controller
PA
B
3 Technical data
3.1 General
Type cartridge valve with
slit--type orifice and parallel/series connected
pressure compensator (hydrostat)
Flow direction P --> A controlled flow
P --> B surplus flow
Seals Viton (FPM)
Mounting method screw--in valve (M
A
=50Nm)
De--energised condition orifice closed
Mounting attitude unrestricted but preferably with solenoid
underneath (automatic air bleed)
Commissioning bleed all air from the system (if possible,
operate valve several times under ’no load’)
100--P--000044--E--05 / 12.04
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3.2 Electrical
Type
pressure tight, oil immersed
(proportional solenoid) Operating voltage Volt DC 12 or 24, from electronic controller
Power consumption
Watt
27 with 12V coil
22.2 with 24V coil
Dither frequency required Hz 50 -- 150
Duty cycle % 100
Enclosure protection IP54 when connector plug is
correctly fitted
Electrical connector pins to suit DIN 43650 plug
Response time
(pressure dependent)
ms 100 (at 100 bar)
3.3 Hydraulic
Controlled flow ranges l/min
06, 10, 16, 25, 32, 40, 50, 63, 80
1)
Inlet flow l/min max. 100
1)
Operating pressure bar max. 315
Leakage
Pressure at B 10 bar
100 bar
200 bar
300 bar
cm
3
/min
22
1)
100
200
400
Minimum pressur drop
(compensator / hydrostat)
bar 5to8
Control accuracy at con-
stant temperature and con-
stant inlet flow rate
% ± 3,5
2)
Fluids mineral oils to DIN 51524 and
51525 (other fluids -- contact Bucher
Hydraulics)
Fluid temperature °C --20 ... +80
Viscosity range mm
2
/s 10 ... 300
Filtration NAS 1638 class 9, ISO / DIN 4406 class 18/14
achievable with filter rating of
ß
10
≧ 75
1) values refer to an oil viscosity of 35
mm
2
/s (cSt)
2) values refer to the flow range chosen
100--P--000044--E--05 / 12.04
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4 Characteristic curves
Solenoid current I [mA] ±6%
100
75
50
25
0
850 1150 1500 2000
400 600 800 1000at 24V
at 12V
4.1 Q - I characteristic
4.2 Pressure drops
4.3 Control accuracy
P[bar]
Q[l/min]
Q
nom
P
max
= 315 bar
∆ Q
Hysteresis
<4%
∆ Q
Static
<5%
∆ Q
Hyst
∆ Q
Stat
4.4 Flow variation with load change-over
P[bar]
0
0 100 200
300
21
20
19
Load pressure at A
Load pressure at B = 100 bar
Load pressure at A
Load pressure at B = 100 bar
Q
A
[l/min]
Q
in
[l/min]
15
10
5
0
0 20 40 60 80 100
p[bar]∆
3)
4)
5)
6)
Nominal flow Q [%]
3) P→B6--50l/min
4) 63, 80 l/min
5) P→A6--50l/min
6) 63, 80 l/min
5 Dimensions
5.1 Flow control valve
with solenoid
SR3C..S--0...
50 A/F
Solenoid can be
P
B
A
with solenoid + basic override
SR3C..N--0...
(p
max
= 250 bar)
(M
A
= 50Nm)
with solenoid + manual
overreide + cover
SR3C..A--0...
secured in any position
with solenoid + deluxe
manual override
SR3C..T--0...
199
200
63
187
153,5
35
29,5
27,5
39
M42x1,5
Solenoid operation
Manual operation
SR3C..H--0***
Fixed flow setting
SR3C..F--0***
P
BA
130,5
65
99
M42x1,5
Manual operation
100--P--000044--E--05 / 12.04
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5.2 Valve cavity
Detail
Z
M5:1
49
(M42x1,5)
1,6
3,2
0,1
0,1
-- 0 , 3
Port B is not required for 2--way flow
controllers.
44.4
+0,1
3.1
+0,4
∅37
+0,05
∅35
+0,05
1,6
1,6
22
30
52
66
∅57
∅0,025
∅0,025
0,025
24
-- 0 , 2
46
-- 0 , 2
M42 x 1,5
18,5
20
1,5 -- max 5
max. ∅12
Z
3,2
30°
30°
6 Ordering code
Controlled (priority) flow ranges
adjustable flow models (operator types S, T, N and A)
0--06 / --10 / --16 / --25 / --32 / --40 / --50 / --63 / --80 l/min = e.g. 50
adjustable flow model (operator type H)
VA (0--12
l/min), VB (0--25 l/min), VC (0--50 l/min) = e.g. VB
VD (0--63
l/min)
adjustable fixed flow setting (operator type F) = **
Operator type Solenoid = S
Solenoid + manual override = T
Solenoid + override = N
Solenoid + man. override + cover = A
Manual = H
Fixed flow setting = F
--
Design number
(inserted by the factory)
Nominal voltage of proportional solenoid 12 V DC = G12
24 V DC = G24
not required for operator types F + H = ***
/
Variants / special features
(to be inserted by the factory)
0G12 /
3C
-
S
50RS
Q=...
7)
Flow control cartridge valve SR3C
7) for fixed flow rate versions, the constant flow rate required must be specified in plain text
100--P--000044--E--05 / 12.04
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7 Mounting bodies
For aluminium bodies p
max
= 250 bar
P
B
A
P
T
B
A
SR3CVM1-****-0M22***
Ordering no.: 100020947
SR3CVM1-2***-0M22*** with pressure relief
Ordering no.: 100020948
(with X port)
Ø8,4
Ø8,4
105
47,5
10
90
45
25,5
95
192
90
45
35
18,520
35
A
B
P
T
Ø8,4
Ø8,4
105
47,5
10
137
60
25,5
95
192
90
45
35
18,5
20
35
A
B
P
90
21
Optional
orifice
Port threads:
P, A and B= M22 x 1,5
X
25,5
X
Port threads:
P, T, A and B = M22 x 1,5
X=M12x1,5
Port threads:
P and T = M22 x 1,5
A and B = M18 x 1,5
020948022081
SR3CVM1-2***-0M18*** with pressure relief
Ordering no.: 100022081
(with X port)
Material: aluminium
Material: aluminium
Optional
orifice
100--P--000044--E--05 / 12.04
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SR3CVM3-***2-0M22*** with anti--cavitation make--up
8)
Ordering no.: 100020809
P
B
A
A
T
B
A
B
M
A
AA
B
B
B
M
T
P
25.5
47.5
25.5
64
90
128
154
192
218
90
175
19413
192.5
46
89
61
110
45
Optional service line
pressure relief
Port threads:
P and T = M22 x 1,5
A and B = M18 x 1,5
M=M10x1
SR3CVM2-2**4-0M22*** with service line pressure relief and anti--cavitation make--up
8)
Ordering no.: 100021036
T
P
B
A
M1
B
A
25.5
47.5
90
22.5
61
92.5
15
75
50
131
140
150
175
41
38
110
157
87
88
Optional service line
pressure
Port threads:
P and T = M22 x 1,5
A and B = M18 x 1,5
M1 = M10 x 1
SR3CVM2-2***-0M22*** with service line pressure relief, without anti--cavitation make--up
8)
Ordering no.: 100 021873
Material: aluminium
Material:
continuously cast GGG40
(a nodular ductile iron)
A
B
A
B
T
P
100--P--000044--E--05 / 12.04
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SR3CVR1-***L-0M22***
Ordering no.: 100020494
GEROTOR--MOTOR
RF--..29..0
20
59
110
55
90
30
176
75
Open for LS
applications
P
T
X
Plugged for LS
applications
Port threads:
P and T = M22 x 1,5
X=M14x1,5
Material:
continuously cast GG25
(a grey cast iron)
X
8) service line pressure relief and
anti--cavitation make--up can be
optionally plugged off.
100--P--000044--E--05 / 12.04
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8 Ordering code
CV * * * /
M2
**2-
M2 223RS -
Type
Separate unit single = M1, double = M2
Motor mtg. (RS29) single = R1, double = R2
Inlet section = E*
Intermediate section = Z*
End section = A*
Bolt--on section = AP
Service line relief for 1st controller in P in A
None =* =*
Pressure range 3 -- 30 bar
9)
=0 =4
Pressure range 30 -- 70 bar
10)
=1 =5
Pressure range 70 -- 200 bar = 2 = 6
Pressure range 200 -- 300 bar = 3 = 7
Additional functions
None = *
For use with LS pump = L
With bypass check valve = R
With anti--cavitation for 1st controller = 1
2nd controller = 2
3rd controller = 3
1st and 2nd controller = 4
1st and 3rd contr o ller = 5
2nd and 3rd contro ller = 6
1st, 2nd and 3rd controller = 7
Port threads DIN 3852 -- M22 x 1,5 = M22
(other threads -- contact Bucher Hydraulics)
Nominal voltage of proportional solenoid (for bodies with solenoid operated valves)
12 V DC = G12
24 V DC = G24
none = ***
Variants / special features
(to be inserted by the factory)
Service line relief for 2nd controller in P in A
None =* =*
Pressure range 3 -- 30 bar
9)
=0 =4
Pressure range 30 -- 70 bar
10)
=1 =5
Pressure range 70 -- 200 bar = 2 = 6
Pressure range 200 -- 300 bar = 3 = 7
Service line relief for 3rd controller in P in A
None =* =*
Pressure range 3 -- 30 bar
9)
=0 =4
Pressure range 30 -- 70 bar
10)
=1 =5
Pressure range 70 -- 200 bar = 2 = 6
Pressure range 200 -- 300 bar = 3 = 7
Mounting body for SR3C cartridge valve
0
Design no. (to be inserted by the factory)
9) only to Q
max
= 25 l/min 10) only to Q
max
=40l/min
The flow control valves must be ordered separately as detailed in section 6
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