RE 18302-05/02.2016, Bosch Rexroth AG
General specifi cations
6 way 2 position valve.
Directional spool valve with direct solenoid control.
Hydraulic / pneumatic pilot , or manual push and twist
control available as option.
Usable as stand-alone, or as multiple stackable units.
Control spool operated by solenoid, with easily
removable coil fastened by a ring nut.
Wet pin tube for DC coil, with push rod for mechanical
override in case of voltage shortage.
Unrestricted 360° orientation of DC coil.
Control spool held in normal position by return spring.
Optional manual override (push-button or screw type).
Connectors available: DIN 43650 – ISO 4400, AMP
Junior, DT04-2P (Deutsch), Free leads.
Size 6
Series 01
Maximum operating pressure 310 bar (4500 psi)
Maximum fl ow 60 l/min (15.85 gpm)
Ports G 3/8 - G 1/2 - SAE8
6/2 ways/positions fl ow diverters
L721.... (VS151-VS152-VS155)
RE 18302-05
Edition: 02.2016
Replaces: 05.2014
Contents
Ordering details 2
Symbols 2
Functional description 3
Technical data 3
Characteristic curves 5
External dimensions and fi ttings 6
Electric connection 8
Bosch Rexroth AG, RE 18302-05/02.2016
2 L721.... (VS151-VS152-VS155) | 6/2 ways/positions fl ow diverters
Ordering details
Ordering details
01 02 03 04 05 06 07 08
L 7 21 0
Family
01 Compact directional valve
L
Type
02 Flow diverters
7
Ports
03 G 3/8 DIN 3852
3
G 1/2 DIN 3852
4
3/4-16 UNF (SAE8)
C
Control type
04 Solenoid (coil C48) without manual override
11
Solenoid (coil C48) with push-button type manual
override
1P
Solenoid (coil C48) with screw type manual override
1F
Hydraulic / pneumatic control
1)
P1
Manual push and twist control
H1
Spool variants
05 6 way / 2 position P1 side
6_
Drain type 6A 6B 6E 6F 6G
06 Internal drain
●●
–
●●
I
External drain
●●●
––E
Voltage supply 31 07 03 01 00
07 Manual push and
twist control
–––––SG
Without coil
––––
●
00
12 V DC
●●●●
–OB
13 V DC
–
●
–
●
–AD
24 V DC
●●●●
–OC
27 V DC
–
●
–
●
–AC
48 V DC
–––
●
–OD
Electric connections
08 Without coils
00
With coils, without mating connector
DIN EN 175301-803
2)
01
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
With coils and bipolar sheathed lead
350mm (13,8 in) long
31
●
= Available
–
= Not available
Symbols
Drain type I
a
C1 C4
P1 P2
1 0
C2
C3
Drain type E
a
C1 C4
P1 P2
1 0
C2
C3
Spool variants
6B
6E
6A
6G
6F
1) Minimum pressure 4 bar (58psi) with external drain (E), maximum
pressure 200 bar (2901psi). With internal drain (I), at the minimum
pressure (4 bar - 58psi), add the working pressure with ratio of
6,5:1. Example: With working pressure 100 bar (1450psi),
minimum pilot pressure is 19.38 bar (281psi) ((100:6,5) + 4 bar
(58psi)).
2) For connectors ordering code see data sheet RE 18325-90.
RE 18302-05/02.2016, Bosch Rexroth AG
6/2 ways/positions fl ow diverters | L721.... (VS151-VS152-VS155)
Functional description
3
Functional description
6 5 4 1 2 3
C1 P1 C2 C4 P2 C3
A valve basically consists of a housing (1), a control spool
(2), a return spring (3) and a solenoid (5). It is designed
to connect two inlet lines P1 – P2 (normally a set of hoses)
and divert them to either the outlet ports (C1 – C4) with
spool in position “0”, when the solenoid is de-energized, or
to the outlet ports (C2 – C3) with spool in position “1”,
when the solenoid is energized.
With the coil de-energized, the return spring (3) pushes
back the spool (2) and holds it in position “0”.
The coil (5) is fastened to the tube by the ring nut (6).
The manual override (6) allows to shift the spool (2) also in
case of voltage shortage.
An external drain, to be connected to tank, ensures shifting
operations also at higher working pressure.
Hydraulic / pneumatic pilot control, or manual push and
twist control for spool shifting are available upon request.
Technical data
General
Valve weight kg (lbs) 2.85 (6.29)
Mounting position unrestricted
Ambient Temperature °C (°F) –20....+50 (-4....+122) (NBR seals)
Hydraulic
Maximum pressure with external drain (“E” type) bar (psi) 310 (4500)
Maximum pressure with internal drain (“I” type) bar (psi) 250 (3625)
Maximum pressure with internal drain and
6F or 6G scheme
bar (psi) 310 (4500)
Maximum fl ow l/min (gpm) 60 (15.85)
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 20/18/15
NAS 1638: class 9
Viscosity range mm
2
/s 5....420
Internal leakage with 100 bar (1450 psi)
secondary pressure at C
cc/min
(in
3
/min)
min. 10 (0.61) - max. 20 (1.2)
Bosch Rexroth AG, RE 18302-05/02.2016
4 L721.... (VS151-VS152-VS155) | 6/2 ways/positions fl ow diverters
Technical data
Electrical
Voltage type DC
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 with DIN 43650 – ISO 4400 connector kg (lbs) 0.5 (1.1)
Voltage V 1213242748
Voltage type DC DC DC DC DC
Power consumption W 36 36 36 36 36
Current (nominal at 20 °C (68 °F)) A 3.0 2.77 1.53 1.32 0.75
Resistance (nominal at 20 °C (68 °F)) Ω 3.97 4.68 15.67 20.42 63.60
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)
C4801 12DC 12 DC
R933000063
OB 03
12 DC AMP JUNIOR C4803 12DC 12 DC
R933000065
OB 07
12 DC DEUTSCH DT 04-2P C4807 12DC 12 DC
R933000068
OB 31
12 DC Cable 350 mm long C4831 12DC 12 DC
R933000064
AD 01
13 DC EN 175301-803
(Ex. DIN 43650)
C4801 13DC 13 DC
R933000069
AD 07
13 DC DEUTSCH DT 04-2P C4807 13DC 13 DC
R933000073
OC 01
24 DC EN 175301-803
(Ex. DIN 43650)
C4801 24DC 24 DC
R933000076
OC 03
24 DC AMP JUNIOR C4803 24DC 24 DC
R933000071
OC 07
24 DC DEUTSCH DT 04-2P C4807 24DC 24 DC
R933000075
OC 31
24 DC Cable 350 mm long C4831 24DC 24 DC
R933000070
AC 01
27 DC EN 175301-803
(Ex. DIN 43650)
C4801 27DC 27 DC
R933000077
AC 07
27 DC DEUTSCH DT 04-2P C4807 27DC 27 DC
R933000074
OD 01
48 DC DIN EN 175301-803 ISO
4400
C4801 48DC 48 DC
R933000078
RE 18302-05/02.2016, Bosch Rexroth AG
6/2 ways/positions fl ow diverters | L721.... (VS151-VS152-VS155)
Characteristic curves
5
Characteristic curves
9
8
7
6
5
4
3
2
1
0
0 10 20 30 40 50 60 l/min
0 3 6 9 12 15 15.8 gpm
130
125
100
75
50
25
0
barpsi
Pressure Δp
Flow Q
3
2
1
Model Curve no.
P1>C1 P1>C2 C4> P2 C3>P2
VS151-G3/8 1111
VS152-G1/2 2233
VS155-SAE8 2233
Measured with hydraulic fl uid ISO-VG32 at 45° ±5 °C
(113° ±9 °F); ambient temperature 20 °C (68 °F).
Port G1/2 DIN 3852
DI performance limits
350
300
250
200
150
100
50
0
5000
4000
3000
2000
1000
0
barpsi
Pressure p
2
1
0 10 20 30 40 50 60 l/min
0 3 6 9 12 15 15.8 gpm
Flow Q
Model Curve no.
VS151 1
VS152 - VS 155 2
Flow across both ways: forward across P1>C1 and
reverse across C4>P2
DE performance limits
350
300
250
200
150
100
50
0
5000
4000
3000
2000
1000
0
barpsi
Pressure p
2
1
0 10 20 30 40 50 60 l/min
0 3 6 9 12 15 15.8 gpm
Flow Q
Model Curve no.
VS151 1
VS152 - VS 155 2
Flow across both ways: forward across P1>C1 and
reverse across C4>P2
Bosch Rexroth AG, RE 18302-05/02.2016
6 L721.... (VS151-VS152-VS155) | 6/2 ways/positions fl ow diverters
External dimensions and fi ttings
Dimensions [mm (inches)]
External dimensions and fi ttings
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1 Ports P1, P2, C1, C2, C3, C4.
2 Three through installation holes reccomended screws M6x40 with
strength class DIN 8.8.
Torque 9-10 Nm (14.7 – 16.2 ft-lb).
3 Ring nut for coil locking Ø 26.5 mm (1.04 inch).
Torque 6-7 Nm (4.4-5.2 ft-lb).
4 Solenoid tube Ø 19 mm (0.75 inch).
5 Minimum clearance needed for connector removal.
6 External drain plug available with G 1/4 and SAE 4 port.
7 Identifi cation label.
8 Overall dimensions with 6F and 6G spools.
RE 18302-05/02.2016, Bosch Rexroth AG
6/2 ways/positions fl ow diverters | L721.... (VS151-VS152-VS155)
External dimensions and fi ttings
7
Dimensions [mm (inches)]
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9 Optional push-button, 1P type, manual override for spool opening:
it is pressure stuck to the ring nut for coil locking.
Mat no. R933000043.
10 Optional screw type manual override, 1F type, for spool opening:
it is screwed (torque 6-7Nm (4.4-5.2 ft-lb)) to the tube as
replacement of the coil ring nut. (Mat no. R933007215)
11 Dimensions of manual version, push and twist type.
12 Dimensions of hydraulic / pneumatic piloted version. Pilot port
plug available with G 1/4.
8
Bosch Rexroth AG, RE 18302-05/02.2016
L721.... (VS151-VS152-VS155) | 6/2 ways/positions fl ow diverters
Electric connection
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.
Electric connection
00 01
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Protection class: IP 65 with female connector
properly fi tted (see drawing).
07
Protection class: IP 69 K with female connector
properly fi tted (see drawing).
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Dimensions [mm (inches)]
