RE 18303-03/02.2016, Bosch Rexroth AG
4/3 - 4/2 Proportional directional valves
L5080… (LC04P)
RE 18303-03
Edition: 02.2016
Replaces: 07.12
4/3 - 4/2 Proportional directional valves
solenoid operated (for open loop control)
RE 18303-03
Edition: 02.2016
Replaces: 07.2012
General specifi cations
Proportional solenoid operated directional spool valve.
Actuation by proportional solenoids with a central tube
and removable coil.
Spring centered control spool.
For mounting on industry standard surface port pattern
to CETOP RP121 H-4.2-P02.
Wet pin DC solenoids with removable coil and manual
override.
Coil can be rotated by 360°.
Size 4
Series 00
Maximum operating pressure 310 bar (4500 psi)
Maximum fl ow 12 l/min (3.17 gpm)
Contents
Ordering details 2
Functional description 3
Technical data 4
Characteristic curves 5
Characteristic curves 6
External dimensions and fi ttings 7
Electric connection 8
L5080… (LC04P)
Bosch Rexroth AG, RE 18303-03/02.2016
2 L5080… (LC04P) | 4/3 - 4/2 Proportional directional valves
Ordering details
Ordering details
01 02 03 04 05 06 07 08 09 10
L5080 00
Family
01 Directional Valve elements
L
Type
02 CETOP valves
5
Size
03 NG 4 (P02)
0
Operation
04 Solenoid operated P45 proportional coil
80
Spools
05 P – T closed in neutral
B
A and B to T in neutral
E
Hydraulic scheme
06 4/3 operated A and B side
2
4/2 operated A side
3
4/2 operated B side
4
Nominal fl ow
1)
07 4 l/min (1.06 gpm)
S3
8 l/min (2.11 gpm)
S4
12 l/min (3.17 gpm)
S5
Voltage
08 Without coil
00
12V DC
OB
24V DC
OC
Electric connections
09 Without coils
00
With coils, without mating connector
DIN EN 175301-803
01
2)
With coils, with bi-directional diode, without mating
connector vertical Amp-Junior
03
Optional
10 Standard
00
Spool variants
=B2
AB
= _2
PT
a0b
a
b
=E2
AB
PT
a0
a
AB
PT
0b
b
= _3 = _4
=B3
=E3
=B4
=E4
1) With ∆p (P > T) 10 bar (145 psi), corresponding approx.
to ∆p P>A,B 5 bar (73 psi).
2) For connectors ordering code see data sheet RE 18325-90.
RE 18303-03/02.2016, Bosch Rexroth AG
4/3 - 4/2 Proportional directional valves | L5080… (LC04P)
Functional description
3
Functional description
5731 24
7
6
APB(T) (T)
a
b
Type L5080
The proportional valves type L5080 are designed as the
solenoid operated ones; they are actuated by proportional
electromagnets and the current supply to the solenoids is
controlled by external electronic control system (Power
Wave Modulator, or PWM). They provide 3 or 4 way fl ow
control, usually from port P to either port A or B, and the
consequent fl ow return to T from B or A respectively.
The valves are composed by a central cast iron body (1)
which mounts on industry standard surfaces where the
fl ow ports and the installation holes are located; the central
body houses the precisely machined directional control
spool (2) which is held in the neutral or initial position by
the return springs (3) and (4). One or two solenoids (5)
and (6), composed by a central tube and a surrounding coil
(a) and (b), are fi tted to the body at the spool’s ends: when
one coil is energized, the magnetic fi eld develops a force on
the oil immersed mobile plunger incorporated in the tube
which pushes the control spool from the initial position into
a displaced position: the spool displacement is
proportional to the electric input.
Example for solenoid (6):
- when coil (b) is energized, the spool (2) travels to the left
proportionally to the electric input supply then the
corresponding opening area of the spool notches is
achieved.
- Across the orifi ce-like openings, fl ow becomes possible
from P to A, and from B to T.
- When coil (b) is de-energized, the force of spring (3)
pushes the spool (2) back to the central position.
Type L5080.3… and L5080.4…
These valves have one solenoid, either (a) or (b),
consequently the directional control spool can travel from
the initial position to one side only. A blinding threaded
plug (7) is fi tted in place of the second solenoid.
Bosch Rexroth AG, RE 18303-03/02.2016
4 L5080… (LC04P) | 4/3 - 4/2 Proportional directional valves
Technical data
Technical data
General
Valve element with 2 solenoids kg (lbs) 1.27 (2.8)
Valve element with 1 solenoid kg (lbs) 0.91 (2.0)
Mounting position Unrestricted
Ambient Temperature °C (°F) –20....+50 (-4....+122) (NBR seals)
Hydraulic
Maximum pressure at P, A and B ports bar (psi) 310 (4500)
Maximum pressure at T bar (psi) 180 (2610)
Maximum inlet fl ow l/min (gpm) 29 (7.66)
Nominal fl ow at ∆P = 10 bar l/min (gpm) 4, 8, 12 (1.06, 2.11, 3.17)
E-schemes p closed in the neutral position
(connection from A to T and B to T)
Approx. 2.3% of the nominal cross-section
Hysteresis % ≤ 5
Hydraulic fl uid
General properties: it must have physical lubricating
and chemical properties suitable for use in hydraulic
systems such as, for example:
Mineral oil based hydraulic fl uids HL (DIN 51524 part 1).
Mineral oil based hydraulic fl uids HLP (DIN 51524 part 2).
For use of environmentally acceptable fl uids (vegetable or
polyglycol base) please consult us.
Fluid Temperature °C (°F) –20....+80 (-4....+176) (NBR seals)
Permissible degree of fl uid contamination ISO 4572: β
x
≥75 X=10...12
ISO 4406: class 19/17/14
NAS 1638: class 8
Viscosity range mm
2
/s 20....380 (optimal 30....46)
Electrical
Voltage type PWM 120 Hz
Voltage tolerance (nominal voltage) % -10 .... +10
Duty Continuous, with ambient temperature ≤ 50°C (122°F)
Coil wire temperature not to be exceeded °C (°F) 150 (302)
Insulation class H
Compliance with Low Voltage Directive LVD 73/23/EC (2006/95/EC), 2004/108/EC
Coil weight kg (lbs) 0.228 (0.503)
Voltage V 12 24
Nominal 100% current A 1.76 0.94
Coil resistance
(nominal at 20°C (68°F))
- Cold value Ω 3.71 13
- Max. hot value Ω 6.1 22.9
Note
For applications with different specifi cations consult us
Code Voltage [V] Connector type Coil description Marking Coil Mat no.
=OB 01
12 DC EN 175301-803
(Ex. DIN 43650)
P45 01 12 DC R933000088
=OB 03
12 DC AMP JUNIOR P45 03 12 DC R933000089
=OC 01
24 DC EN 175301-803
(Ex. DIN 43650)
P45 01 24 DC R933000090
=OC 03
24 DC AMP JUNIOR P45 03 24 DC R933000091
RE 18303-03/02.2016, Bosch Rexroth AG
4/3 - 4/2 Proportional directional valves | L5080… (LC04P)
Characteristic curves
5
Characteristic curves
Ordering code S3: it supplies 4 l/min (1.06 gpm) nominal fl ow at 100% duty cycle, with 10 bar (145 psi) pressure drop.
l/min
12
10
8
6
4
2
0
5
4
3
2
1
gpm
3,2
3
2
1
0
Flow Q
20 30 40 50 60 70 80 90 100 Current %
1 ΔP = 10 bar (145 psi) constant
2 ΔP = 20 bar (290 psi) constant
3 ΔP = 30 bar (435 psi) constant
4 ΔP = 40 bar (580 psi) constant
5 ΔP = 50 bar (725 psi) constant
Ordering code S4: it supplies 8 l/min (2.11 gpm) nominal fl ow at 100% duty cycle, with 10 bar (145 psi) pressure drop.
l/min
20
18
16
14
12
10
8
6
4
2
0
5
4
3
2
1
gpm
5.3
5
4
3
2
1
0
20 30 40 50 60 70 80 90 100 Current %
1 ΔP = 10 bar (145 psi) constant
2 ΔP = 20 bar (290 psi) constant
3 ΔP = 30 bar (435 psi) constant
4 ΔP = 40 bar (580 psi) constant
5 ΔP = 50 bar (725 psi) constant
Flow Q
Ordering code S5: it supplies 12 l/min (3.17 gpm) nominal fl ow at 100% duty cycle, with 10 bar (145 psi) pressure drop.
l/min
30
27
24
21
18
15
12
9
6
3
0
5
4
3
2
1
gpm
8
7
6
5
4
3
2
1
0
20 30 40 50 60 70 80 90 100 Current %
1 ΔP = 10 bar (145 psi) constant
2 ΔP = 20 bar (290 psi) constant
3 ΔP = 30 bar (435 psi) constant
4 ΔP = 40 bar (580 psi) constant
5 ΔP = 50 bar (725 psi) constant
Flow Q
Measured with hydraulic fl uid ISO-VG32 at 45° ±5 °C
(113° ±9 °F); ambient temperature 20 °C (68 °F).
Δp= valve pressure differential (inlet pressure Pp minus load Pl and
minus return pressure Pt).
The characteristic curves are obtained with 4 way connected, P→A
/ B→T or P→B / A→T.
Bosch Rexroth AG, RE 18303-03/02.2016
6 L5080… (LC04P) | 4/3 - 4/2 Proportional directional valves
Characteristic curves
Characteristic curves
Ordering code S3
l/min
20
16
12
8
4
0
3
2
1
gpm
5.3
5
4
3
2
1
0
50 100 150 200 250 300 bar
0 800 1600 2400 3200 4000 psi
1 at 40% mean current
2 at 70% mean current
3 at 100% mean current
Flow Q
Ordering code S4
l/min
35
30
25
20
15
10
5
0
3
2
1
gpm
9.3
9
8
7
6
5
4
3
2
1
0
0 800 1600 2400 3200 4000 psi
50 100 150 200 250 300 bar
1 at 40% mean current
2 at 70% mean current
3 at 100% mean current
Flow Q
Ordering code S5
l/min
50
40
30
20
10
0
3
2
1
0 800 1600 2400 3200 4000 psi
gpm
13,2
12
10
8
6
4
2
0
50 100 150 200 250 300 bar
1 at 40% mean current
2 at 70% mean current
3 at 100% mean current
Flow Q
The performance curves are obtained with two ports connected,
P→A or P→B.
RE 18303-03/02.2016, Bosch Rexroth AG
4/3 - 4/2 Proportional directional valves | L5080… (LC04P)
External dimensions and fi ttings
7
Dimensions [mm (inches)]
External dimensions and fi ttings
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Required surface finish
of mating piece.
1 Valve body.
2 Identifi cation label.
3 Proportional solenoid.
4 Blinding threaded plug, for versions L 5080.3… and L5080.4…,
with 2 switched positions.
5 Seals (same O Ring) on ports A,B,P,T.
6 Threaded coil retainer nut. Torque 5÷6 Nm (3.69÷4.42 ft-lb).
7 Proportional solenoid, with coil (a).
8 Locking screws 3 pieces: ISO 4762 (UNI 5931) hexagon socket
head cap screw M 5x25, recommended specifi c strength 8.8 class,
to be ordered separately. Torque 5 ÷ 6 Nm (3.69 ÷ 4.42 ft-lb).
9 Drilling specifi cations of standard mounting surface according to
CETOP RP 121 H-4.2-4-P02.
10 Clearance needed for connector removal.
8
Bosch Rexroth AG, RE 18303-03/02.2016
Bosch Rexroth Oil Control S.p.A.
Oleodinamica LC Division
Via Artigianale Sedrio, 12
42030 Vezzano sul Crostolo
Reggio Emilia - Italy
Tel. +39 0522 601 801
Fax +39 0522 606 226 / 601 802
compact-hydraulics-cdv@boschrexroth.com
www.boschrexroth.com/compacthydraulics
© This document, as well as the data, specifi cations and other information
set forth in it, are the exclusive property of Bosch Rexroth Oil Control S.p.a..
It may not be reproduced 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.
Subject to change.
L5080… (LC04P) | 4/3 - 4/2 Proportional directional valves
Electric connection
00
without coil
01
Protection class: IP 65 when connector
with seal is properly screwed down.
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03
Protection class: IP 65 with female connector
properly fi tted (see drawing).
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