RE 18301-06/02.2016, Bosch Rexroth AG
4/3 - 4/2 Directional valve elements
L8_80… (ED4-P)
RE 18301-06
Edition: 02.2016
Replaces: 07.12
4/3 - 4/2 Directional valve elements
with proportional control and
with or without LS connections
RE 18301-06
Edition: 02.2016
Replaces: 07.2015
General specifi cations
Valve element with direct proportional control of spool.
Control spool operated by solenoid with removable
coils.
In the de-energized condition, the control spool is held
in the central position by return springs.
Wet pin proportional tubes for DC coils, with push rod
for mechanical override; nickel plated surface.
Manual override (push-button or screw type) available
as option.
Plug-in connectors available: EN 175301-803 (Was DIN
43650) and DT04-2P (Deutsch).
Size 6
Series 00
Maximum operating pressure 310 bar (4500 psi)
Maximum fl ow 40 l/min (10.5 gpm)
Port connections G 3/8 - G 1/2 - SAE6 - SAE8
Contents
Ordering details 2
Symbols 2
Functional description 3
Technical data 4
Characteristic curves 5
External dimensions and fi ttings 6
Electric connection 8
Electronic feed regulator 9
L8_80… (ED4-P)
Bosch Rexroth AG, RE 18301-06/02.2016
2 L8_80… (ED4-P) | 4/3 - 4/2 Directional valve elements
Ordering details
Ordering details
01 02 03 04 05 06 07 08 09 10 11
L 8 80 S 00
Family
01 Directional Valve elements ED
L
Type
02 Size 6 proportional
8
Confi guration
03 Standard
0
With Load Sensing control
4
Coil type
04 D15
80
Spool variants
05 4/3 operated both sides a and b; P – T closed in neutral
B2
4/2 operated on side a only; P – T closed in neutral
B3
4/2 operated on side b only; P – T closed in neutral
B4
4/3 operated on both sides a and b; A and B to T in neutral
E2
4/2 operated on side a only; A and B to T in neutral
E3
4/2 operated on side b only; A and B to T in neutral
E4
Flow pattern
06 Both meter in and out
S
Meter in
I
Nominal fl ow
1)
07 10 l/min (2.64 gpm)
2
20 l/min (5.28 gpm)
4
30 l/min (7.9 gpm)
6
Voltage supply 07 03 01 00
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
With coils, with bi-directional diode, without mating
connector DT04-2P
07
Ports
10 G 3/8 DIN 3852
0
9/16-18 UNF 2-B (SAE6)
1
G 1/2 DIN 3852
2
3/4-16 UNF 2-B (SAE8)
3
Options
11 No options
No
code
Push-button type manual override
0P
Screw type manual override
0F
Lever type manual override
3)
_ _
●
= Available
–
= Not available
Symbols
= 0
= 4
AB
P
T
AB
P
T
LS
Spool variants
A
A
B
B
P
P
T
T
a
a
b
b
=B2S
=E2I
=B3S
=B4S
=E4I
AB
P
T
a
A
A
B
B
P
P
T
T
b
b
AB
P
T
ab
=E2S
=E3S
=E3I
=E4S
A
A
B
B
P
P
T
T
a
a
AB
P
T
b
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.
3) Each different option for the type of manual override chosen
implies a specifi c ordering code (refer to page 7).
In neutal position, the valves cross section are as follows:
E_I ≥ 20% of nominal cross section.
E_S ≥ 2% of nominal cross section.
RE 18301-06/02.2016, Bosch Rexroth AG
4/3 - 4/2 Directional valve elements | L8_80… (ED4-P)
Functional description
3
Functional description
673412436755
The sandwich plate design directional valve elements
L8080… are compact direct operated proportional
solenoid valves which control the start, the stop, the
direction and the quantity of the oil fl ow. These elements
basically consist of a stackable housing (1) with a control
spool (2), one or two solenoids (3), and one or two return
springs (4).
Energized by an electronic feed regulator, each solenoid (3)
displaces the control spool (2) from its neutral-central
position “0” proportionally to the current received; a
regulated oil fl ow P to A, or P to B, is achieved. Once the
solenoid is de-energized, the return spring (4) pushes the
spool thrust washer (5) back against the housing and the
spool returns in its neutral-central position.
Each coil (3) is fastened to the solenoid tube by a ring nut
(6). A pin (7) allows to push the spool (2) in emergency
conditions, when the solenoid cannot be energized, like in
case of voltage shortage.
Bosch Rexroth AG, RE 18301-06/02.2016
4 L8_80… (ED4-P) | 4/3 - 4/2 Directional valve elements
Technical data
Technical data
General
Valve element with 2 solenoids kg (lbs) 2.20 (4.85)
Valve element with 1 solenoid kg (lbs) 1.70 (3.75)
Ambient Temperature °C (°F) –20....+50 (-4....+122) (NBR seals)
Hydraulic
Maximum pressure at P bar (psi) 310 (4500)
Maximum pressure at T bar (psi) 210 (3050)
Maximum inlet fl ow l/min (gpm) 40 (10.5)
Nominal fl ow with DP P>T = 10 bar (145 psi) l/min (gpm) 10, 20, 30, 40 (2.64, 5.28, 7.9, 10.5)
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) 0.335 (0.739)
Voltage V 12 24
Nominal 100% current A 1.76 0.88
Coil resistance
(nominal at 20°C (68°F))
- Cold value Ω 4 16
- Max. hot value Ω 6.1 24.4
Electronic control
Electronic feed regulators
1)
Upon request
1) An electronic, open loop type, regulator with plug-in pins EN 175301-803 is available and can be fi tted onto the solenoid directly.
For valve elements with two solenoids, two electronic regulators are needed (refer to page 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)
D15 01 12 DC R933000092
=OB 03
12 DC AMP JUNIOR D1530 12 DC R933002877
=OB 07
12 DC DEUTSCH DT 04-2P D15 07 12 DC R933000094
=OC 01
24 DC EN 175301-803
(Ex. DIN 43650)
D15 01 24 DC R933000093
=OC 03
24 DC AMP JUNIOR D1530 24 DC R933003515
=OC 07
12 DC DEUTSCH DT 04-2P D15 07 12 DC R933002798
RE 18301-06/02.2016, Bosch Rexroth AG
4/3 - 4/2 Directional valve elements | L8_80… (ED4-P)
Characteristic curves
5
Ordering code 6: 30 l/min (7.92 gpm) with Δp 10 bar (145 psi)
Characteristic curves
Ordering code 4: 20 l/min (5.28 gpm) with Δp 10 bar (145 psi)
Ordering code 2: 10 l/min (2.64 gpm) with Δp 10 bar (145 psi).
Δp=290psi
Δp= 20bar
Δp= 145psi
Δp= 10bar
Δp= valve pressure differential (inlet pressure Pp minus load Pl and minus return pressure Pt).
0 20 40 60 80 100%A
l/min
30
25
20
15
10
5
0
gpm
7.9
7
6
5
4
3
2
1
0
Flow Q
% of maximum control current
0 20 40 60 80 100%A
l/min
30
25
20
15
10
5
0
gpm
7.9
7
6
5
4
3
2
1
0
Δp=290psi
Δp= 20bar
Δp=290psi
Δp= 20bar
Δp= 145psi
Δp= 10bar
Δp= 145psi
Δp= 10bar
Flow Q
% of maximum control current
0 20 40 60 80 100%A
l/min
60
50
40
30
20
10
0
gpm
15.8
14
12
10
8
6
4
2
0
Flow Q
% of maximum control current
Bosch Rexroth AG, RE 18301-06/02.2016
6 L8_80… (ED4-P) | 4/3 - 4/2 Directional valve elements
External dimensions and fi ttings
Dimensions [mm (inches)]
External dimensions and fi ttings
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1 Solenoid tube Ø 23 mm (0.9 inch).
3 Ring nut for coil locking (Ø 30 mm);
torque 6 – 7 Nm (4.4 – 5.2 ft-lb).
4 Flange specifi cations for coupling to ED intermediate elements
with ports G 3/8 and SAE 6.
5 For tie rod and tightening torque information see data sheet RE
18301-90.
6 Clearance needed for connector removal.
7 A and B ports.
8 Identifi cation label.
9 Optional push-button manual override, EP type, for spool opening:
it is pressure stuck to the ring nut for coil locking. Mat no.
R933003289.
10 Optional screw type manual override, EF type, for spool opening:
it is screwed (torque 6-7 (4.4-5.2 ft-lb)) to the tube as
replacement of the coil ring nut. Mat no. R933003116.
11 Four threaded holes M5 for fi tting a secondary fl angeable element
(only for elements with ports G 3/8 and SAE 6). Bolts M5 with
recommended strength class DIN 8.8:
torque 5 – 6 Nm (3.6-4.4 ft-lb).
12 Flange specifi cations for coupling to ED intermediate elements
with ports G 1/2 and SAE 8.
RE 18301-06/02.2016, Bosch Rexroth AG
4/3 - 4/2 Directional valve elements | L8_80… (ED4-P)
External dimensions and fi ttings
7
Dimensions [mm (inches)]
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1 Ordering Details: HA (if fi tted to side A)
or HB (if fi tted to side B)
2 Ordering Details: VA (if fi tted to side A)
or VB (if fi tted to side B)
3 Ordering Details: H1 (if fi tted to side A)
or H9 (if fi tted to side B)
4 Ordering Details: V1 (if fi tted to side A)
or V9 (if fi tted to side B)
5 Ordering Details: XA (if fi tted to side A)
or XB (if fi tted to side B)
6 Ordering Details: X1 (if fi tted to side A)
or X9 (if fi tted to side B)
Bosch Rexroth AG, RE 18301-06/02.2016
8 L8_80… (ED4-P) | 4/3 - 4/2 Directional valve elements
Electric connection
Dimensions [mm (inches)]
Electric connection
01
Protection class: IP 65 when connector with seal is properly
screwed down.
03
Protection class: IP 65 with female connector
properly fi tted (see drawing).
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07
Protection class: IP 69 K with female connector
properly fi tted.
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RE 18301-06/02.2016, Bosch Rexroth AG
4/3 - 4/2 Directional valve elements | L8_80… (ED4-P)
Electronic feed regulator
9
Dimensions [mm (inches)]
Electronic feed regulator
SU PPL Y
OFF SE T
RAMP UP
RA MP DOW N
FULL LOAD
CV P4−H
2AMPERE
12 −24 V D C
CU R R E N T
3
2
1
()
()
()
()
()
()
Electronic feed regulator
Regulator ordering code R933003290
Supply voltage 12-30 VDC
Control Signal 0-10 VDC
Max. output current 2 A
Minimum output current 0....0.6 A
Ramp adjustment up/down 0.1....10 s
PWM Frequency adjustment (pre-set 120 Hz) 100....500 Hz
Ambient operating temperature -10....+60 °C
(14
....
+140 °F)
Weight 0.12 kg
(26.4 lbs)
Electromagnetic compatibility EN50081-1/2EN61000-4-2/3/4/5/6
Protection class with connector and seal correctly fi tted
and properly screwed down.
IP 65 (DIN40050 part 9)
Potentiometer resistance 5....10 κ Ω
Supply: yellow LED, lit up with power ON.
Off Set: minimum current adjustment. Adjust solenoid
current so that the desired minimum value is obtained.
Clockwise rotation increases current.
Ramp up: Ramping up time adjustment.
Ramp down: Ramping down time adjustment.
For longer ramping times, turn potentiometers clockwise;
for shorter ramping times, turn the potentiometers counter-
clockwise.
Full load current: Maximum current adjustment. Adjust
solenoid current so that the desired maximum value is
obtained (up to 2A). Clockwise rotation increases current.
Frequency adjustment: it is possible to set the PWM
frequency obtaining the desired control sensitivity. After
removing the external plastic cover, turn the adjusting
screw; clockwise rotation increases frequency from 100 to
500 Hz.
10
Bosch Rexroth AG, RE 18301-06/02.2016
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.
L8_80… (ED4-P) | 4/3 - 4/2 Directional valve elements
Electric connection
