RE 18301-08/02.2016, Bosch Rexroth AG
4/3 Directional valve elements
L8_L1… (ED-LV)
RE 18301-08
Edition: 02.2016
Replaces: 07.12
4/3 Directional valve elements
with manual lever operated control
and with or without LS connections
RE 18301-08
Edition: 02.2016
Replaces: 07.2012
General specifi cations
Valve elements 4 ways 3 positions.
Control spools manual operated by hand lever.
Control spool with return spring or mechanical detent
for all three positions.
Size 6
Series 00
Maximum operating pressure 310 bar (4500 psi)
Maximum ow 60 l/min (15.8 gpm)
Port connections G 3/8 - G 1/2 - SAE8
Contents
Ordering details 2
Functional description 3
Technical data 4
Characteristic curves 5
External dimensions and fi ttings 6
L8_L1… (ED-LV)
Bosch Rexroth AG, RE 18301-08/02.2016
2 L8_L1… (ED-LV) | 4/3 Directional valve elements
Ordering details
Ordering details
01 02 03 04 05 06 07 08 09 10
L 8 L1 0
Family
01 Directional Valve elements ED
L
Type
02 Size 6
8
Confi guration
03 Standard
0
With Load Sensing control
4
Operation type
04 Manual lever
L1
Spool variants
05 4/3 4 ways and 3 positions
_2
Flow pattern
06 Both meter in and out
1)
S
Nominal fl ow
2)
07 18 l/min (5.75 gpm)
4
3)
40 l/min (10.6 gpm)
8
Side with the control lever
08 a side with handle aiming high (A and B direction)
A0
a side with handle aiming low (opposite to A and B)
A2
b side with handle aiming high (A and B direction)
B0
b side with handle aiming low (opposite to A and B)
B2
Manual lever control
09 With return spring
M1
With mechanical detent for all three positions
F1
Ports
10 G 3/8 DIN 3852
0
G 1/2 DIN 3852
2
3/4-16 UNF 2-B (SAE8)
3
Symbols
AB
P
T
= 0
= 4
AB
P
LS
T
Spool variants
=B2S
=E2S4
E2S8
a0b
=A2S
Side with the control lever
AB
= _2S_A_M1_
PT
a0b
= _2S_A_F1_
AB
P
T
a0b
AB
PT
a0b
AB
P
T
a0b
= _2S_B_M1_
= _2S_B_F1_
1) Only meter in for E2S8 spool variant
2) With ∆p (P > T) 10 bar (145 psi), corresponding approx.
to ∆p P>A,B 5 bar (73 psi).
3) Available only for B_, E_ spool variants.
RE 18301-08/02.2016, Bosch Rexroth AG
4/3 Directional valve elements | L8_L1… (ED-LV)
Functional description
3
Functional description
1324
5
The sandwich plate design directional valve elements
L8_1… are compact manual operated valves which control
the start, the stop and the direction of the oil fl ow.
These elements basically consist of a stackable housing (1)
with a control spool (2), a block with the control lever (3),
and a spring housing (4) with a return spring (5).
The hand operated lever moves the control spool (2) from
its neutral-central position “0” to the required position “a”
or “b”, and the required fl ow from P to A (with B to T), or P
to B (with A to T) is achieved.
Type L8_L1_2S_ __M100 is the valve version in which the
return spring (5) brings the spool back to neutral-central
position “0” when the manual lever is not operated.
The valve is available with a choice of spool variants (refer
to page 2).
Type L8_L1_2S_ __F100 is the valve version with mechanical
detent in which the control spool (2) stays in anyone of the
3 achieved positions “0”, “a” or “b” when the lever is left
free. With this valve, the oil delivery can continue without
any action on the lever.
Also this version is available with a choice of spool variants
(refer to page 2).
Special types of control are available upon request.
Bosch Rexroth AG, RE 18301-08/02.2016
4 L8_L1… (ED-LV) | 4/3 Directional valve elements
Technical data
Technical data
General
Valve element weight kg (lbs) 1.55 (3.42)
Mounting position kg (lbs) 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) 160 (2320)
Maximum inlet fl ow l/min (gpm) 60 (15.9)
Nominal fl ow with DP P>T = 10 bar (145 psi) l/min (gpm) 10, 20, 30 (2.64, 5.28, 7.9)
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=12...15
ISO 4406: class 20/15/15
NAS 1638: class 9
Viscosity range mm
2
/s 5....420
Note
For applications with different specifi cations consult us
RE 18301-08/02.2016, Bosch Rexroth AG
4/3 Directional valve elements | L8_L1… (ED-LV)
Characteristic curves
5
Characteristic curves
0 10 20 30 40 50 60 l/min
0 2 4 6 8 10 12 14 15.8 gpm
psi
260
250
200
150
100
50
0
5
1
2
3
4
bar
18
16
14
12
10
8
6
4
2
0
Pressure Δp
Flow Q
Spool Variant Curve no.
P>A P>B A>T B>T P>T
B2S8, E2S8 2244-
A2S8 33331
B2S4, E2S4
1155-
Measured with hydraulic fl uid ISO-VG32 at 45° ±5 °C
(113° ±9 °F); ambient temperature 20 °C (68 °F).
Performance limits
bar
350
300
250
200
150
100
50
0
1
psi
5100
5000
4000
3000
2000
1000
0
0 10 20 30 40 50 60 l/min
0 2 4 6 8 10 12 14 15.8 gpm
Pressure p
Flow Q
Spool Variant Curve no.
A2S8, B2S8, E2S8, B2S4, E2S4 1
Minimum fl ow for effi ciency of LS control
bar
60
50
40
30
20
10
0
0 1 2 3 4 5 6 l/min
0 0.3 0.6 0.9 1.2 1.6 gpm
psi
900
750
600
450
300
150
0
Pressure p
Flow Q