RE 18160, edition: 2012-05, Bosch Rexroth AG
▶ Component size 1
▶ Component series A
▶ Maximum operating pressure 420 bar
▶ Maximum fl ow 80 l/min
Proportional pressure relief valve,
pilot operated,
increasing characteristic curve
Features
▶ Cartridge valve
▶ Mounting cavity R/UNF10-01-0-06
▶ Pilot operated proportional valve for system pres-
surelimitation
▶ Suitable for mobile and industrial applications
▶ Operation by means of proportional solenoid with cen-
tral thread and detachable coil
▶ Rotatable solenoid coil
▶ Via an adjustment screw, the valve is set to maxi-
mumpressure
▶ In case of power failure, the minimum pressure is set
▶ Fine adjustment of the command value pressure charac-
teristic curve possible from the outside at the con-
trolelectronics
RE 18160
Edition: 2012-05
H7893
Type KBVS.1A
Contents
Features 1
Ordering code 2
Valve types 3
Function, symbol 4
Technical data 5 ... 7
Characteristic curves 8
Minimum terminal voltage at the coil and relative 9, 10
duty cycle
Unit dimensions 11
Mounting cavity 12
Available individual components 13
More information 13
2/12 KBVS..1A | Proportional pressure relief valve
Bosch Rexroth AG, RE 18160, edition: 2012-05
Ordering code
01
Proportional pressure relief valve, pilot operate
d
KBV
S
Pressure ratin
g
02
U
p
to 50 bar
C
U
p
to 100
b
ar
F
U
p
to 150
b
ar
H
Up to 210
b
ar
L
U
p
to 250
b
ar
N
U
p
to 315 bar
P
U
p
to 350
b
ar
R
U
p
to 420
b
ar
T
03
Com
p
onent s
i
ze 1
1
04
Wit
h
a comman
d
va
l
ue = 0, t
h
e minimum
p
ressure is se
t
A
05
Com
p
onent ser
i
es
A
06
Hi
g
h Performance and mountin
g
cavity R
/
UNF-10-01-0-06
(
see pa
g
e 11
)
F
0
7
P
ro
p
ortiona
l
so
l
enoi
d
, wet-
p
i
n
C
Supp
l
y vo
l
ta
g
e
08
Co
n
t
r
ol
elect
r
o
ni
cs
12 V D
C
G
1
2
Contro
l
e
l
ectronics 24 V DC
G2
4
El
ect
r
ica
l
co
nn
ectio
n
09
Wi
t
h
out
matin
g
connector, wit
h
connector accor
d
in
g
to DIN EN 175301-80
3
K4
W
it
h
out
matin
g
connector, with connector DT 04-2PA
(
Deutsch connector
)
K4
0
W
i
t
h
out
matin
g
connector, wit
h
connector AMP Junior-Time
r
C
4
Sea
l m
ate
r
ial
1
0
FKM
seals
V
(other seals u
p
on re
q
uest) Atte
n
tio
n! Observe compatibilit
y
o
f
seals with h
y
draulic
fl
uid used
!
11
Sta
n
da
r
d
v
e
r
s
i
on
n
o
code
Coil 800 mA
(
see page 6
)
-
8
12
Furt
h
er
d
etai
l
s in t
h
e
pl
ain text
*
01
02
03
04
05
06
07
08
09
1
0
1
1
1
2
KBV
S
1
A
A
/
F
C
V
*
1)
Mating connectors, separate order, see data sheet 08006.
Valve types
Type Material no. Type Material no.
KBVSC1AA/FCG24K40V R901290550 KBVSN1AA/FCG24K40V R901290569
KBVSF1AA/FCG24K40V R901290561 KBVSP1AA/FCG24K40V R901290570
KBVSH1AA/FCG24K40V R901290562 KBVSR1AA/FCG24K40V R901290580
KBVSL1AA/FCG24K40V R901290567 KBVST1AA/FCG24K40V R901290585
2
1
2
1
2
1
Proportional pressure relief valve | KBVS..1A 3/12
RE 18160, edition: 2012-05, Bosch Rexroth AG
General
Valves of type KBVS are pilot operated proportional pres-
sure relief valves in spool design and are used to limit the
pressure in hydraulic systems. They mainly consist of the
screwed-in proportional pilot control valve (1) and the main
valve (2).
These valves can be used for infinitely adjusting the pres-
sure to be limited depending on the command value. With
command value 0 or in case of power failure, the minimum
pressure is set.
Function
For the proportional increase in the system pressure, a
command value is specified at the control electronics. The
electronics control the solenoid coil with electric current
depending on the command value, which via the pilot
control valve (1) and the main valve (2) causes the actual
pressure adjustment in main port ①.
(p
max
= command value max; p
min
= command value 0)
Function, symbol
Version "K4"
Version "C4"
Version "K40"
(with mating connector)
Type KBVS.1A..
① = Main port 1
② = Main port 2
Notice!
Occurring tank pressures (main port ②) are added up to
the set values in main port ①.
Symbol
4/12 KBVS..1A | Proportional pressure relief valve
Bosch Rexroth AG, RE 18160, edition: 2012-05
Technical data (For applications outside these parameters, please consult us!)
general
Weight
kg
0.75
Installation position Any - if it is ensured that no air can collect upstream the valve.
Otherwise, we recommend suspended installation of the valve.
Ambient temperature range
°C
–40 to +120 (see page 8 and 9)
Storage temperature
°C
–20 to +80
Environmental audits
Vibration test according to DIN EN 60068-2 / IEC 60068-2 /2 axes (X/Y)
DIN EN 60068-2-6: 05/96
Vibrations, sine-shaped
10 cycles (5 Hz to 2000 Hz back to 5 Hz) with logarithmic frequency
changing speed of 1 octave/min, 5 to 57 Hz, amplitude 1.6 mm (p-p),
57 to 2000 Hz, amplitude 10 g
IEC 60068-2-64: 05/93 Vibrations (random) and broad-
bandnoise
20 to 2000 Hz, amplitude 0.1 g
2
/Hz (14 g RMS/30 g peak),
testing time 24 h
DIN EN 60068-2-27: 03/95 Shocking Half-sine 15 g / 11 ms; 3 x in positive, 3 x in negative direction
(a total of 6 single shocks)
DIN EN 60068-2-29: 03/95 Bump test
Half-sine 15 g / 11 ms; 1000 x in positive, 1000 x in negative direction
(a total of 2000 single shocks)
Indication per axis
Climatic test according to EN 60068-2 / IEC 60068-2 (environmental audit)
DIN EN 60068-2-1: 03/95 Storage temperature –40 °C, duration 16 h
DIN EN 60068-2-2: 08/94 +110 °C, duration 16 h
DIN EN 60068-2-1: 03/95 Cold test 2 cycles –25 °C, duration 2 h
DIN EN 60068-2-2: 08/94 Dry heating test 2 cycles +120 °C, duration 2 h
IEC 60068-2-30: 1985 Humid heat, cyclic Variant 2/ +25 °C to +55 °C
93% to 97% relative humidity, 2 cycles à 24 h
Salt spray test according to DIN 50021
h 720
→ Coating generally not necessary. If paint is applied nevertheless, the reduced heat dissipation capacity is to be observed.
Proportional pressure relief valve | KBVS..1A 5/12
RE 18160, edition: 2012-05, Bosch Rexroth AG
1)
The maximum operating pressure is added up from the set pres-
sure and the return flow pressure!
2)
The valves are factory-set. In case of subsequent adjustment, the
warranty will become invalid!
3)
The cleanliness classes specified for the components must be
adhered to in hydraulic systems. Effective filtration prevents faults
and at the same time increases the service life of the components.
For the selection of the filters see www.boschrexroth.com/filter.
hydraulic
Maximum operating pressure
1
)
– Main port ①
bar 420
Maximum admissibler return
flow pressure
– Main port ②
bar 210
Maximum set pressure
2)
See command value pressure characteristic curves page 7
Maximum set pressure with command value 0 See characteristic curves page 7
Maximum flow
l/min 80
Pilot oil
l/min
< 0.8
Leakage
ml/min
< 200 (with Δp = 250 bar; closed pilot control valve and
HLP46, ϑ
oil
= 40 °C)
Hydraulic fluid See table below
Hydraulic fluid temperature range
°C
–40 to +80
Viscosity range
mm
2
/s
5 to 400 (preferably 10 to 100)
Maximum permitted degree of contamination of the hyd-
raulic fluid - cleanliness class according to ISO 4406 (c)
Class 20/18/15
3)
Load cycles 10 million
Hysteresis
4)
< 4 % of the max. set pressure
Turnover voltage
4)
< 0.5 % of the max. set pressure
Response sensitivity
4)
< 0.5 % of the max. set pressure
Manufacturing tolerance of the
command value pressure cha-
racteristic curve
– Command value 100%
< 5 % of the max. set pressure
– Command value 0 < 2 % of the max. set pressure
Step response (T
u
+ T
g
)
0
→ 100 % and/or 100 % → 0
ms
100 (depending on the system)
Technical data (For applications outside these parameters, please consult us!)
4)
Measured with analog amplifier type RA2-1/10, see data
sheet95230 (PWM = 300Hz).
Hydraulic fl uid Classifi cation Suitable sealing materials Standards
Mineral oils
HL, HLP FKM DIN 51524
Bio-degradable – Insoluble in water
HEES FKM VDMA 24568
– Soluble in water
HEPG FKM
Important information on hydraulic fl uids!
▶ For more information and data on the use of other hydraulic fluids
refer to data sheet 90220 or contact us!
▶ There may be limitations regarding the technical valve data (tem-
perature, pressure range, service life, maintenance intervals, etc.)!
▶ The flash point of the hydraulic fluids used must be 40 K higher
than the maximum solenoid surface temperature.
▶ Bio-degradable: When using bio-degradable hydraulic fl uids that
are simultaneously zinc-solving, zinc may accumulate in the fluid.
6/12 KBVS..1A | Proportional pressure relief valve
Bosch Rexroth AG, RE 18160, edition: 2012-05
Technical data (For applications outside these parameters, please consult us!)
5)
In case of use in altitudes > 2000 m a.s.l., we recommend consul-
ting the manufacturer.
6)
Due to the surface temperatures of the solenoid coils, the stan-
dards ISO 13732-1 and ISO 4413 need to be adhered to!
electric
Voltage type Direct voltage
Supply voltages
V 12 DC 24 DC
"-8" / 24 DC
Maximum solenoid current
mA 1760 1200 800
Coil resistance – Cold value
at 20 °C
Ω
2.3 4.8 11.5
– Max. hot
value
Ω
3.8 7.9 18.9
Duty cycle
%
See characteristic curve page 8 and 9
5)
Maximum coil temperature
6)
°C 150
Protection class according to VDE 0470-1
(DIN EN 60529)
DIN 40050-9
– Version "K4" IP 65 with mating connector mounted and locked
– Version "C4" IP 66 with mating connector mounted and locked
IP 69K with Rexroth mating connector (material no. R901022127)
– Version "K40" IP 69K with mating connector mounted and locked
Control electronics (separate order) Plug-in proportional amplifier
typeVT-SSPA1…
Data sheet 30116
Analog amplifier type RA... Data sheet 95230
BODAS control unit type RC... Data sheet 95200
Recommended dither frequency (PMW)
Hz 300
Design according to VDE 0580
When establishing the electrical connection, the protective
earthing conductor (PE
) has to be connected properly.
0
0
20 40 80 10060
50
100
150
200
250
300
350
400
450
0
0
40 80
50
100
150
200
250
300
350
400
450
10 60
500
20 30 50 70
0
0
20 40 8060
5
10
15
20
10 30 50 70
Proportional pressure relief valve | KBVS..1A 7/12
RE 18160, edition: 2012-05, Bosch Rexroth AG
Characteristic curves (measured with HLP46, ϑ
oil
= 40 ±5 °C and 24 V coil)
Command value in % →
Pressure in main port ① depending on the command value; fl ow = 10 l/min
Pressure in main port ①
in bar →
Flow in l/min →
Pressure in main port ①
in bar →
Pressure in main port ① depending on the fl ow.
(The characteristic curves were measured without back pressure in main port ②)
Minimum set pressure in the main port ① depending on the fl ow.
(The characteristic curves were measured without back pressure in main port ②)
Flow in l/min →
Minimum set pressure in bar →
-40
3
-20 0 40 12020
3,5
4
4,5
5
5,5
6
6,5
7
100
75
80
85
90
95
100
105
110
115
60 80
1,45
1,5
1,55
1,6
1,65
1,7
1,75
1,8
1,85
1
2
3
-40
4
-20
0 40 12020
5
6
7
8
9
10
100
75
80
85
90
95
100
105
60 80
1
1,05
1,1
1,15
1,2
1,25
1,3
1
3
2
8/12 KBVS..1A | Proportional pressure relief valve
Bosch Rexroth AG, RE 18160, edition: 2012-05
Minimum terminal voltage at the coil and relative duty cycle
Ambient temperature in °C →
Ambient temperature in °C →
Required minimum voltage at
the coil (1) →
Required minimum voltage at
the coil (1) →
Reduced duty cycle for I
max
(1.76 A) in % (2) →
Reduced duty cycle for I
max
(1.2 A) in % (2) →
Admissible continuous application of
current in A with 100 % duty cycle (3) →
Admissible continuous application of
current in A with 100 % duty cycle (3) →
– Version "G12"
– Version "G24"
Admissible working range depending on the ambient temperature
Notice!
The characteristic curves have been determined for coils with
valve with medium test block size (80 x 80 x 80 mm), without
fl ow in calm air.
Depending on the installation conditions (block size, fl ow, air
circulation, etc.) there may be a better heat dissipation. Thus, the
area of application is broadened.
In single cases, more unfavorable conditions may lead to limita-
tions of the area of application.
Limited valve performance
Proportional pressure relief valve | KBVS..1A 9/12
RE 18160, edition: 2012-05, Bosch Rexroth AG
Minimum terminal voltage at the coil and relative duty cycle
Admissible working range depending on the ambient temperature
-40
4
-20
0 40 12020
6
8
10
12
14
16
100
75
80
85
90
95
100
105
60 80
0,65
0,7
0,75
0,8
0,85
0,9
0,95
1
3
2
Ambient temperature in °C →
Required minimum voltage at
the coil (1) →
Reduced duty cycle for I
max
(0.8 A) in % (2) →
Admissible continuous application of
current in A with 100 % duty cycle (3) →
– Version "G24..-8"
Notice!
The characteristic curves have been determined for coils with
valve with medium test block size (80 x 80 x 80 mm), without
fl ow in calm air.
Depending on the installation conditions (block size, fl ow, air
circulation, etc.) there may be a better heat dissipation. Thus, the
area of application is broadened.
In single cases, more unfavorable conditions may lead to limita-
tions of the area of application.
Limited valve performance
13
30
37
15
90
109,5
7
34
33
55
2
0
84
50
2
1
64,4
11
98
56
10/12 KBVS..1A | Proportional pressure relief valve
Bosch Rexroth AG, RE 18160, edition: 2012-05
Unit dimensions (dimensions in mm)
① = Main port 1
② = Main port 2
1
Mating connectors, separate order, see data sheet 08006
2
Space required to remove the mating connector
3
SW24, tightening torque M
A
= 55
+5
Nm
4
Version "K4"
5
Version "K40"
6
Version "C4"
7
Nut, tightening torque M
A
= 5
+1
Nm
X
B
7/8-14UNF-2B
23,95 0,05
min 30
1 0,5
16
+1
23,7
+0,4
25,3
+0,4
33,3
+0,5
min 12,3
max 23,6
max 15
15,87
+0,05
Rzmax 8
A
0,05
2
1
Rz1 8
A
0,01
0,05
A B
Y
30
-
2
0,008- / Pt 20
R0,1
+0,1
max R0,4
Rz1max 8
C
A
0,1
B
2,5
+0,4
45
5
-0,2 +0,2
Rz 32
1)
E
Proportional pressure relief valve | KBVS..1A 11/12
RE 18160, edition: 2012-05, Bosch Rexroth AG
Mounting cavity R/UNF-10-01-0-06; 2 main ports; thread 7/8-14UNF-2B (dimensions in mm)
1)
Visual inspection
① = Main port 1
② = Main port 2
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifi cations and other information set
forth in it, are the exclusive property of Bosch Rexroth AG. It may not be repro-
duced or given to third parties without its consent.
The data specifi ed above only serve to describe the product. No statements
concerning a certain condition or suitability for a certain application can be
derived from our information. The information given does not release the user
from the obligation of own judgment and verifi cation. It must be remembered
that our products are subject to a natural process of wear and aging.
Bosch Rexroth AG, RE 18160, edition: 2012-05
12/12 KBVS..1A | Proportional pressure relief valve
More information
▶ Control electronics:
– Plug-in proportional amplifi er typeVT-SSPA1…
Data sheet 30116
– Analog amplifi er type RA…
Data sheet 95230
– BODAS control unit type RC…
Data sheet 95200
▶ Selection of the fi lters
www.boschrexroth.com/filter
998
090
050
020
Item Denomination Direct voltage Material no.
020
Coil for individual connection
1)
K4 12 V
24 V / 1200 mA
24 V / 800 mA
R901002932
R901002319
R901049962
K40 12 V
24 V / 1200 mA
24 V / 800 mA
R901003055
R901003053
R901050010
C4 12 V
24 V / 1200 mA
24 V / 800 mA
R901003044
R901003026
R901049963
050
Nut
R900992146
090
Seal ring for pole tube
R900007769
998
Seal kit of the valve
R901006735
Available individual components
1)
After exchange of the solenoid coil, the pressure set in the factory
may change by ±5 %.
