Check valve
hydraulically pilot operated
RE 21468/07.05
Replaces: 02.03
Types SV and SL
Nominal sizes 10 to 32
Component series 4X
Maximum operating pressure 315 bar
Maximum flow 550 l/min
H5558
Overview of contents
Contents
Features
Page
For subplate mounting
Features
Connection location to ISO 5781
Ordering details
Subplates to data sheet RE 45062 (separate order)
Preferred types
For threaded connections
Symbols
With internal or external pilot oil drain, optional
Function, section
With or without decompression feature, optional
Technical data
Characteristic curves
5, 6
Version with decompression feature for dampened
decompression (minimising possible pressure shocks)
Unit dimensions
7, 8
4 opening pressures, optional
Information on available spare parts:
www.boschrexroth.com/spc
1/8
2/8
Bosch Rexroth AG
Hydraulics
SV; SL
RE 21468/07.05
Ordering details
S
4X
=V
=L
Internal pilot oil drain
External pilot oil drain
Type SV
Connection type
Further details in clear text
Seal material
NBR seals
FKM seals
Attention!
The compatibility of the seals and pressure
fluid used has to be taken into account!
No code =
V=
Type SL
Ordering details
Nom. size 10
= 10
= 10
= 10
= 10
Nom. size 16
= 15
= 15
Nom. size 20
= 20
= 20
= 20
= 20
Nom. size 25
= 25
= 25
Nom. size 32
= 30
= 30
= 30
= 30
4X =
Opening pressure
=P
=G
For subplate mounting
For threaded connections
Component series 40 to 49
(40 to 49: unchanged installation
and connection dimensions)
=A
=B
With decompression feature
Without decompression feature
1=
2=
3=
4=
See p-qV-characteristic curves
A to B,
Pages 5 and 6
Preferred types
Type SL
Material No.
Type SV
Material No.
SL 10 GA1-4X/
R900483370
SV 10 GA1-4X/
R900483368
SL 10 GB1-4X/
R900451135
SV 10 GB1-4X/
R900453511
SL 10 PA1-4X/
R900483371
SV 10 PA1-4X/
R900483369
SL 10 PB1-4X/
R900443419
SV 10 PB1-4X/
R900467724
SL 15 GA1-4X/
R900587553
SV 15 GA1-4X/
R900587549
SL 20 PA1-4X/
R900587559
SV 20 GA1-4X/
R900587550
SL 20 PB1-4X/
R900599586
SV 20 PA1-4X/
R900587557
SL 25 GA1-4X/
R900587555
SV 25 GA1-4X/
R900587551
SL 30 GA1-4X/
R900587556
SV 30 GA1-4X/
R900587552
SL 30 PA1-4X/
R900587560
SV 30 PA1-4X/
R900587558
Further preferred types and standard units can be
found within the EPS (Standard Price List).
Symbols
Version SV (internal pilot oil drain)
B
Version SL (external pilot oil drain)
B
Y A X
RE 21468/07.05
Hydraulics Bosch Rexroth AG
SV; SL
3/8
Function, section
The SV and SL valves are hydraulic pilot operated check valves
of poppet type design which may be opened to permit flow in
the reverse direction.
In order to ensure that the valve opens due to the pressure
applied to the control spool (4), a certain minimum pilot
pressure is required (see page 4).
These valves are used for the isolation of operating circuits
which are under pressure, i.e. as a safe guard against the
lowering of a load when a line break occurs or against
creeping movements of hydraulically locked actuators.
Types SV..A.. and SL..A.. (with decompression)
The valve basically comprises of the housing (1), the poppet
(2), a compression spring (3), the control spool (4) as well as
an optional decompression feature as a ball poppet valve (5).
Type SV
The valve permits free-flow from A to B. In the reverse
direction, the poppet (2) is held firmly on to its seat in addition
to the spring force by the system pressure.
By applying pressure to connection X, the control spool (4) is
moved to the right. This lifts poppet (2) off its seat. Now the
valve also permits free-flow from B to A.
This valve is fitted with an additional decompression feature.
When pressure is applied to port X, the control spool (4) is
moved to the right. This firstly lifts the ball (5.1) and then the
poppet (2) off their seats. The valve now permits flow from B
to A.
Because of the decompression feature there is a dampened
decompression of the pressurised fluid. Due to this possible
pressure shocks are avoided.
Type SL...
The function of this valve corresponds to that of the type SV.
The difference is the external Y connection. Here, the annular
area of the control spool (4) is separated from the port A.
Pressure present in port A only acts on area A4 (9) of the
control spool (4).
5; 5.1
Type SV..PA.-4X/... (without pilot oil drain, with decompression)
1 9
6 Area A1
7 Area A2
8 Area A3
9 Area A4
Y A
Type SL..PB.-4X/... (with pilot oil drain, without decompression)
4/8
Bosch Rexroth AG
Hydraulics
SV; SL
RE 21468/07.05
Technical data (for applications outside these parameters, please consult us!)
General
Nominal sizes
Weight
NS10
Subplate mounting
kg
1.8
Threaded connections
kg
2.1
Installation
NS16
NS20
NS25
4.7
5.4
5.4
NS32
7.8
10
10
Optional
Ambient temperature range
C 30 to +80 (NBR seals)
20 to +80 (FKM seals)
Hydraulic
Maximum operating pressure
Maximum flow
bar 315
l/min See characteristic curves, pages 5 and 6
Control pressure
bar 5 to 315
Mineral oil (HL, HLP) to DIN 51524 1); fast bio-degradable
pressure fluids to VDMA 24568 (also see RE 90221); HETG
(rape seed oil) 1); HEPG (polyglycoles) 2); HEES (synthetic
ester) 2); other pressure fluids on request
Pressure fluid
Pressure fluid temperature range
C 30 to +80 (NBR seals)
20 to +80 (FKM seals)
mm2/s 2.8 to 500
Viscosity range
Maximum permissible degree of contamination of the
pressure fluid. Cleanliness class ISO 4406 (c)
Class 20/18/15 3)
Flow direction
Free-flow from A to B, from B to A when opened
Control volume
Control areas
(areas according to
sectional drawing,
see page 3)
Port X
cm3
2.5
10.8
10.8
19.27
19.27
Port Y (only type SL)
cm3
2.0
9.6
9.6
17.5
17.5
Area A1
cm2
1.33
3.46
3.46
5.72
5.72
Area A2
cm2
0.33
0.7
0.7
1.33
1.33
Area A3
cm2
3.8
10.17
10.17
16.61
16.61
Area A4
cm2
0.79
1.13
1.13
1.54
1.54
1)
Suitable for NBR and FKM seals
2)
Only suitable for FKM seals
3)
The cleanliness class stated for the components must be
adhered too in hydraulic systems. Effective filtration prevents
faults from occurring and at the same time increases the
component service life.
For the selection of filters see catalogue sheets RE 50070,
RE 50076, RE 50081, RE 50086 and RE 50088.
RE 21468/07.05
Hydraulics Bosch Rexroth AG
SV; SL
5/8
Characteristic curves: subplate mounting (measured with HLP46, oil = 40 C 5 C)
p-qV-characteristic curves
NS32
16
24
14
Pressure differential in bar
Pressure differential in bar
NS10
28
20
16
12
4
0
25
50
75
100
12
6
4
150
125
10
100
300
200
Flow in l/min
Flow in l/min
400
500 550
NS20
Pressure differential in bar
20
A to B
17,5
15
Opening pressure in bar
12,5
10
7,5
2,5
0
50
B to A
100
150
200
250
300
NS10
NS20
NS32
1.5
2.5
2.5
7.5
10
10
10
350
Flow in l/min
Control pressure-load pressure-characteristic curves
Without decompression
With decompression
120
3
100
80
60
40
20
0
60
120
180
240
300 330
Control pressure in bar
Control pressure in bar
120
100
80
60
2 Limiting value
40
4
20
0
Load pressure in bar
1 Scatter range
60
120
180
240
Load pressure in bar
3 Valve poppet
4 Decompression
300 330
6/8
Bosch Rexroth AG
Hydraulics
SV; SL
RE 21468/07.05
Characteristic curves: threaded connections (measured with HLP46, oil = 40 C 5 C)
p-qV-characteristic curves
NS25 and 32
16
24
14
Pressure differential in bar
Pressure differential in bar
NS10
28
20
16
12
3
25
50
75
100
Flow in l/min
12
6
4
2
0
150
125
10
100
300
200
400
500 550
Flow in l/min
NS16 and 20
Pressure differential in bar
20
A to B
17,5
15
B to A
Opening pressure in bar
12,5
10
7,5
5
2,5
3
2
1
50
100
150
200
250
300
NS10
NS16 and 20
NS25 and 32
1.5
2.5
2.5
7.5
10
10
10
350
Flow in l/min
Control pressure-load pressure-characteristic curves
Without decompression
With decompression
120
3
100
80
60
40
20
0
60
120
180
240
300 330
Control pressure in bar
Control pressure in bar
120
100
80
60
2 Limiting value
40
4
20
0
Load pressure in bar
1 Scatter range
60
120
180
240
Load pressure in bar
3 Valve poppet
4 Decompression
300 330
RE 21468/07.05
Hydraulics Bosch Rexroth AG
SV; SL
7/8
1,5
Unit dimensions: subplate mounting (nominal dimensions in mm)
H2
H3
H1
A
4
L1
L5
L4
L2
11H13
5
6
L3
B1
L6
L9
L10
L7
L8
2 Name plate
B5
3 Locating pin
8 Connection location to
ISO 5781
8
7
0,01/100mm
L11
Type NS
10
20
L12
L2
L3
Required surface finish of the
valve mounting surface
L4
100,8 15,5 15,5 87,8
135
17,7
47,7
117
L5
L6
Type NS
47,7
117
L10
L11
7,2
35,8
21,5
60,3 27,5
11,1 49,2
20,6
156,1 36,1 46,1 134 22,1 84,2
17,7
L9
42,9 18,5
100,8 15,5 15,5 87,8
135
L8
18
10
20
L7
13
32
32
16,7
67,5
24,6
13
42,9 18,5
39
7,2
35,8
21,5
21,5
18
60,3 27,5
11,1 49,2 39,5
20,6
59,5
24,6
156,1 36,1 46,1 134 22,1 84,2
39
16,7
67,5
L12
H1
H2
H3
B6
L13
B1
B2
B3
B4
B5
10
31,8
84
66,7
44
58,8
51
29
36
33,3
20
44,5
100
79,4
61
73
70
37
55
39,7
42,1 62,7
118
96,8
75
92,8
85
42,5
70
48,4
66,7
44
58,8
7,9
51
29
36
33,3
32
10
SL
L1
Subplates
Rz1max 4
L13
SV
5 Valve with opening pressure
versions 1 and 2 (dim. L2)
7 6 valve fixing holes
for type SV/SL 30
SL
4 Identical seal rings
for ports A and B
for ports X and Y
6 Valve with opening pressure
versions 3 and 4 (dim. L3)
B2
B3
B4
B6
SV
1 Port Y with valve type "SL"
(with valve type "SV" this port is
plugged)
20
32
31,8
84
44,5
100
79,4
61
73
6,4
70
37
55
39,7
42,1 62,7
118
96,8
75
92,8
3,8
85
42,5
70
48,4
NS10
G 460/01 (G3/8)
G 461/01 (G1/2)
NS20
G 412/01 (G3/4)
G 413/01 (G1)
NS32
G 414/01 (G1 1/4)
G 415/01 (G1 1/2)
to data sheet RE 45062 (separate order)
Valve fixing screws
(separate order)
NS10
4 off ISO 4762 - M10 x 50 - 10.9
NS20
4 off ISO 4762 - M10 x 70 - 10.9
NS32
6 off ISO 4762 - M10 x 85 - 10.9
(friction value ges = 0.14);
Tightening torque MA = 75 Nm 10%
(with changed surfaces please adapt)
8/8
Bosch Rexroth AG
Hydraulics
SV; SL
RE 21468/07.05
1,5
Unit dimensions: threaded connections (nominal dimensions in mm)
H1
Y
A
A
H2
5
6
L2
L1
L5
L3
11H13
B1
1 Port Y for valve type "SL" (for
valve type "SV" this port is
plugged)
L4
L6
L10
L8
L7
2 Name plate
5 Valve with opening pressure
versions 1 and 2 (dim. L2)
6 Valve with opening pressure
versions 3 and 4 (dim. L3)
B3
7 2 valve fixing holes
Ports
B2
Type
SV
Type
SV
SL
L9
SL
NS
A, B
10
G1/2
16
G3/4
20
G1
25
G1 1/4
32
G1 1/2
10
G1/2
16
G3/4
20
G1
25
G1 1/4
32
G1 1/2
X, Y
G1/4
G1/4
NS
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
B1
B2
B3
H1
H2
10
100,8
15,5
15,5
87,8
13
56,5
10,5
33,5
22,5
17,3
87
66,7
33,4
44
22
16, 20
133
17,7
47,7
115
18
74,5
17
50,5
36
27
105
79,4
39,7
68
34
25, 32
156,1
35,7
45,7
134
22,1
101
24
84
49
18
130
96,8
48,4
85
42,5
10
100,8
15,5
15,5
87,8
13
56,5
10,5
33,5
22,5
17,3
87
66,7
33,4
44
22
16, 20
133
17,7
47,7
115
18
74,5
17
50,5
36
27
105
79,4
39,7
68
34
25, 32
156,1
35,7
45,7
134
22,1
101
24
84
49
18
130
96,8
48,4
85
42,5
Bosch Rexroth AG
Hydraulics
Zum Eisengieer 1
97816 Lohr am Main, Germany
Telefon +49 (0) 93 52 / 18-0
Telefax +49 (0) 93 52 / 18-23 58
documentation@boschrexroth.de
www.boschrexroth.de
This document, as well as the data, specifications and other informations
set forth in it, are the exclusive property of Bosch Rexroth AG. Without their
consent it may not be reproduced or given to third parties.
The data specified above only serves to describe the product. No statements
concerning a certain condition or suitability for a certain application can be
derived from our information. The details stated do not release you from the
responsibility for carrying out your own assessment and verification. It must
be remembered that our products are subject to a natural process of wear
and ageing.
