BOSCH REXROTH
R978908621
- BOSCH REXROTH
- Material:R978908621
- Model:4WH6D5X/O SO135
Due to extremely high demand, please call 877-366-7226 for availability
The Bosch Rexroth 4WH6D5X/O SO135 (R978908621) is a high-performance directional spool valve designed to control the start, stop, and direction of fluid flow in hydraulic systems. This particular model is part of the WH series of valves that are known for their robust construction, consisting of a durable housing, actuation elements such as a hydraulic actuation cylinder, a control spool, and return springs. The valve ports are radially positioned for ease of integration into various systems. This specific valve features a throttle insert which is essential when operational conditions may lead to flows during switching processes that could surpass the valve's performance limit. The throttle insert is placed in channel P to regulate these flows effectively. Moreover, the 4WH6D5X/O SO135 operates without spring return and includes a detent mechanism allowing each spool position to be securely locked, providing stability in various positions during operation. Additionally, the model is designed to be directly operated with hydraulic actuation and can be used as a spool position valve with detent. It comes without spring return in its default state which means there isn't a defined spool position when deenergized unless actuated otherwise. This feature allows for flexibility in control depending on system requirements. The Bosch Rexroth 4WH6D5X/O SO135 also adheres to international standards with porting patterns according to DIN form A without locating hole and ISO with locating hole, ensuring compatibility with various subplates which must be ordered separately. It can accommodate maximum operating pressures and flow rates specified by its component series X. For precise monitoring of the valve's position, it supports inductive position switches and proximity sensors that operate contactlessly for enhanced durability and reliability during operation.
General information
Valves of type WH are fluidically actuated directional spool valves. They control the start, stop and direction of a flow.
The directional valves basically consist of housing (1), one or two actuation elements (2) (hydraulic actuation cylinder), control spool (3) and one or two return springs (4). The ports for the control are positioned radially (5).
When de-energized, the control spool (3) is held in the central position or in the initial position by the return springs (4) (except impulse spool).
The control spool (3) is moved to the desired spool position by means of the actuation elements.
Throttle insert
The use of a throttle insert is required when due to prevailing operating conditions, flows can occur during the switching processes, which exceed the performance limit of the valve.
It is inserted in channel P of the directional valve.
Typ 4WH 6 E5X/...
Without spring return, with detent,
version ..OF/..
Directional valves with hydraulic actuation are also available as a 2-spool position valve with detent (7). If actuation elements with detent are used, each spool position can be locked.
Without spring return,
version ..O/..
If actuation elements without return springs and without detent are used, there is no defined spool position in the de-energized state.
Type 4WP 6 C6X/OF/N...
|
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
||
|
W |
H |
no code |
6 |
5X |
/ |
J |
/ |
* |
|
01 |
3 main ports |
3 |
|
4 main ports |
4 |
|
|
02 |
Directional valve |
W |
|
Type of actuation |
||
|
03 |
hydraulic |
H |
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04 |
Ports radial |
no code |
|
05 |
Size 6 |
6 |
|
06 |
Spool symbol, e. g. C, E, EA, EB etc. 2) |
|
|
07 |
Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions) |
5X |
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08 |
With spring return |
no code |
|
Without spring return |
O |
|
|
Without spring return with detent |
OF |
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|
09 |
Improved corrosion protection 3) |
J |
|
10 |
Without manual override |
no code |
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With manual override |
N3) |
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|
Spool position monitoring 7) |
||
|
11 |
Without position switch |
no code |
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Monitored spool position "a" |
QMAG24 |
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|
Monitored spool position "b" |
QMBG24 |
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|
Monitored rest position |
QM0G24 |
|
|
12 |
Without throttle insert |
no code |
|
Throttle Ø 0.8 mm |
B086) |
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Throttle Ø 1.0 mm |
B106) |
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Throttle Ø 1.2 mm |
B126) |
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Seal material |
||
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13 |
NBR seals |
no code |
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FKM seals |
V |
|
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Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) |
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Clamping length |
||
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14 |
42 mm (standard) |
no code |
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22 mm |
Z |
|
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15 |
Without locating hole |
no code |
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With locating hole |
/605) |
|
|
With locating hole and locking pin ISO 8752-3x8-St |
/62 |
|
|
16 |
Further details in the plain text |
* |
Preferred types and standard units are specified in the EPS (standard price list).
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Switching positions |
|||
|
2 |
3 |
Type WH |
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|
no code |
● |
● |
● |
|
O |
● |
● |
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|
OF |
● |
● |
|
|
● = available |
|||
| 1) Not with version “N” | |
| 2) For symbols and example, see Symbols and Types of actuation | |
| 3) The external parts made of metal are galvanized, treated with an anti-corrosion agent or made of stainless steel. This design is also suitable for on-wall applications. | |
| 5) Locking pin ISO 8752-3 x 8-St, material no. R900005694, separate order | |
| 6) Use if volume flow > performance limits of the valve, effective in channel P. | |
| 7) Not for version “J” |
general
|
Size |
6 | ||
|
Weight (approx.) |
Valve with one actuation cylinder |
kg |
2 |
|
Valve with two actuation cylinders |
kg |
2.2 | |
|
Installation position 1) |
any | ||
|
Ambient temperature range |
NBR seals |
°C |
-30 … +80 |
|
FKM seals |
°C |
-20 … +80 | |
| 1) | With version ../O.. (A, C and D) : horizontal |
hydraulic
|
Size |
6 | ||
|
Maximum operating pressure |
Port P |
bar |
315 |
|
Port A |
bar |
315 | |
|
Port B |
bar |
315 | |
|
Port T 1) |
bar |
160 | |
|
Maximum flow |
l/min |
60 | |
|
Flow cross-section (spool position 0) |
Symbol Q |
mm2 |
approx. 6 % of nominal cross-section |
|
Symbol W |
mm2 |
approx. 3 % of nominal cross-section | |
|
Minimum pilot pressure 2) |
bar |
6 | |
|
Maximum pilot pressure |
bar |
200 | |
|
Pilot volume |
cm³ |
1.23 | |
|
Hydraulic fluid |
see table | ||
|
Hydraulic fluid temperature range |
NBR seals |
°C |
-30 … +80 |
|
FKM seals |
°C |
-20 … +80 | |
|
Viscosity range |
mm²/s |
2.8 … 500 | |
|
Maximum admissible degree of contamination of the hydraulic fluid 3) |
Class 20/18/15 according to ISO 4406 (c) | ||
|
Maximum switching frequency |
Hz |
2 | |
| 1) | With symbols A and B, port T must be used as leakage oil connection if the operating pressure exceeds the admissible tank pressure. |
| 2) | 6 ... 10 bar > tank pressure, performance limits dependent on the minimum pilot pressure, see chapter "Diagrams/characteristic curves", section "Performance limits" |
| 3) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. |
|
Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
|
|
Mineral oil |
HL, HLP |
FKM, NBR |
DIN 51524 |
|
|
Bio-degradable |
Insoluble in water |
HEES (synthetic esters) |
FKM |
VDMA 24568 |
|
HETG (rape seed oil) |
FKM, NBR |
|||
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Soluble in water |
HEPG (polyglycols) |
FKM |
VDMA 24568 |
|
|
Other hydraulic fluids on request |
||||
Inductive position switch type QM: electrical connection
The electric connection is realized via a 4-pole mating connector (separate order) with connection thread M12 x 1.
electrical
|
Connection voltage (DC voltage) |
V |
24 | ||
|
Voltage tolerance (connection voltage) |
+30 %/-15 % | |||
|
Admissible residual ripple |
% |
≤ 10 | ||
|
Max. load capacity |
mA |
400 | ||
|
Switching outputs 
|
PNP transistor outputs, load between switching outputs and GND | |||
|
Pinout 
|
1 |
V |
24 | |
|
2, 4 |
Switching output |
mA |
400 | |
|
3 |
Earthing (GND) |
V |
0 | |
For applications outside these parameters, please consult us!
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves
|
Symbol |
Direction of flow |
|||
|
P-A |
P-B |
A-T |
B-T |
|
|
A |
3 |
3 |
– |
– |
|
B |
3 |
3 |
– |
– |
|
C |
1 |
1 |
3 |
1 |
|
D |
5 |
5 |
3 |
3 |
|
E |
3 |
3 |
1 |
1 |
|
F |
1 |
3 |
1 |
1 |
|
G |
6 |
6 |
9 |
9 |
|
H |
2 |
4 |
2 |
2 |
|
J |
1 |
1 |
2 |
1 |
|
L |
3 |
3 |
4 |
9 |
|
M |
2 |
4 |
3 |
3 |
|
P |
3 |
1 |
1 |
1 |
|
Q |
1 |
1 |
2 |
1 |
|
R |
5 |
5 |
4 |
– |
|
T |
10 |
10 |
9 |
9 |
|
U |
3 |
3 |
9 |
4 |
|
V |
1 |
2 |
1 |
1 |
|
W |
1 |
1 |
2 |
2 |
|
Y |
5 |
5 |
3 |
3 |
|
Further characteristic curves: |
|
|
7 |
Symbol “R” in switching position “b” (B → A) |
|
8 |
Symbol “G” and “T” in central position (P → T) |
|
9 |
Symbol “H” in central position (P → T) |
Minimum pilot pressure dependent on the tank pressure
At a higher tank pressure, the minimum pilot pressure has to be increased according to this diagram.
Performance limits
(measured with HLP46, ϑOil = 40 ±5 °C)
Notice!
The switching function of the valves is independent from the filtration due to the adhesive effect. To achieve the specified admissible flow values, a full flow filtration with 25 μm is recommended. The flow forces acting within the valves also influence the flow performance.
With 4-way directional valves, the specified flow data are therefore valid for normal operation with 2 directions of flow (e. g. from P to A and simultaneous return flow from B to T).
If there is only one direction of flow, the admissible flow may be significantly lower in critical cases (e. g. if a 4-way directional valve is used as a 3-way directional valve due to blocked port A or B).
|
Pilot pressure 6 bar > tank pressure |
||
|
Spring return |
Characteristic curve |
Symbol |
|
“no code” |
1 |
A, B |
|
2 |
C, D, Y |
|
|
3 |
E, J, L, U, M, Q, V, W, E1- |
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|
4 |
F, P |
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|
5 |
T |
|
|
6 |
G, H |
|
|
7 |
R |
|
|
../O.. |
8 |
A, C, D |
|
../OF.. |
||
|
Pilot pressure 10 bar > tank pressure |
||
|
Spring return |
Characteristic curve |
Symbol |
|
“no code” |
1 |
A, B |
|
8 |
C, D, Y, E, G, H, J, L, U, M, Q, V, W, E1- |
|
|
9 |
F, P
|
|
|
10 |
R |
|
|
11 |
T |
|
|
../O.. |
8 |
A, C, D |
|
../OF.. |
||
Attention!
Caution in conjunction with differential cylinders due to pressure intensification!
| 1) |
Example: – Symbol E with spool position "a" → ordering code ..EA.. – Symbol E with spool position “b” → ordering code ..EB.. |
| 2) | Symbol E1-: P → A/B pre-opening |
|
Ordering code |
Type of actuation |
||
|
Symbol |
Actuation side |
Spool return |
|
|
A, C, D |
|
||
|
../O.. |
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||
|
../OF.. |
|
||
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B, Y |
|
||
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E, F G, H J, L M, P Q, R T, U V, W |
a = A |
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|
|
b = B |
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|
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Dimensions in mm
|
|
Required surface quality of the valve contact surface |
|
L1 |
L2 |
L3 |
L4 |
L5 |
|
mm |
mm |
mm |
mm |
mm |
| 22.5 | 64.5 | 48 | 90 | 138 |
|
1 |
Valve with 2 spool positions and 2 actuation cylinders |
|
Valve with 3 spool positions and 2 actuation cylinders |
|
|
2 |
Actuation cylinder “a” |
|
3 |
Actuation cylinder “b” |
|
4 |
Cover for valve with 1 actuation cylinder (2 spool positions) |
|
5 |
Same seal rings for ports A, B, P, T |
|
6 |
Name plate |
|
7 |
Porting pattern according toISO 4401-03-02-0-05 (with locating hole for locking pin ISO 8752-3x8-St, material no. R900005694, separate order) |
|
8 |
Connection |
|
9 |
Port with version “WHZ” |
|
11 |
Alternative clamping length (): 22 mm |
Subplates according to data sheet 45052 (separate order)
(without locating hole)
G 341/01 (G1/4)
G 342/01 (G3/8)
G 502/01 (G1/2)
(with locating hole)
G 341/60 (G1/4)
G 342/60 (G3/8)
G 502/60 (G1/2)
G 341/12 (SAE-6)1)
G 342/12 (SAE-8)1)
G 502/12 (SAE-10)1)
1) On request
Valve mounting screws (separate order)
Clamping length 42 mm:4 hexagon socket head cap screws, metric
ISO 4762-M5 x 50-10.9-flZn-240h-L
(friction coefficient μtotal = 0.09 to 0.14);
tightening torque MA = 7 Nm ± 10 %,
material no. R913000064
or
4 hexagon socket head cap screws
ISO 4762-M5 x 50-10.9 (self procurement)
(friction coefficient μtotal = 0.12 to 0.17);
tightening torque MA = 8.1 Nm ± 10 %
4 hexagon socket head cap screws UNC
10-24 UNC x 2″ ASTM-A574
(friction coefficient μtotal = 0.19 to 0.24);
tightening torque MA = 11 Nm± 15 %,
(friction coefficient μtotal = 0.12 to 0.17);
tightening torque MA = 8 Nm ± 10 %,
material no. R978800693
Clamping length 22 mm:4 hexagon socket head cap screws, metric
ISO 4762-M5 x 30-10.9-flZn-240h-L
(friction coefficient μtotal= 0.09 to 0.14);
tightening torque MA = 7 Nm ± 10 %,
material no. R913000316
or
4 hexagon socket head cap screws
ISO 4762-M5 x 30-10.9 (self procurement)
(friction coefficient μtotal = 0.12 to 0.17);
tightening torque MA = 8.1 Nm± 10 %
4 hexagon socket head cap screws UNC
10-24 UNC x 1 1/4 ″
(friction coefficient μtotal = 0.19 to 0.24);
tightening torque MA = 11 Nm± 15 %,
(friction coefficient μtotal = 0.12 to 0.17);
tightening torque MA = 8 Nm± 10 %,
material no. R978802879
Spool position monitoring
Inductive position switch type QM
Dimensions in mm
| 1) | For dimensions, see valve dimensions |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.