4WMRZ6D6X/
Manufacturer: Bosch Rexroth
Material #: R901139843
Model : 4WMRZ6D6X/
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth 4WMRZ6D6X/ (R901139843) is a high-precision directional spool valve designed for controlling the start, stop, and direction of fluid flow within hydraulic systems. This mechanical, manually actuated valve is part of the WM series and features a roller plunger type of actuation which allows for smooth operation and precise control. The valve's housing contains a control spool that can be shifted to various positions by the roller plunger, while one or two return springs ensure the spool returns to its central or starting position when not engaged.
Equipped with a detent mechanism, this model allows each selected spool position to be securely maintained, providing reliable performance in various applications. The 4WMRZ6D6X/ valve is specifically designed without a detent when using roller plunger actuation. For scenarios where flow rates during switching exceed the valve's performance limit, a throttle insert can be added in channel P to modulate the flow accordingly.
This particular model conforms to DIN form A porting pattern without locating holes and ISO with locating holes for versatile mounting options. It supports inductive position switches and proximity sensors for contactless detection of the spool position, enhancing its functionality in complex hydraulic systems.
The 4WMRZ6D6X/ has a maximum operating pressure of 315 bar and can handle a maximum flow rate of up to 60 liters per minute. Its compact size combined with these specifications makes it suitable for an array of industrial applications requiring robust and accurate control of hydraulic flows.
$950.00 USD
Availability: 2 In Stock
Available for immediate shipmentQty: Delivered as early as October 2, 2024 when ordered in
This product is eligible for factory repair.
Type WM.. valves are mechanical, manually actuated directional spool valves. They control the start, stop and direction of a flow. Directional valves basically consist of housing (1), one type of actuation (2) (roller plunger), control spool (3) and one or two return springs (4). In de-energized state, the return springs (4) maintain the control spool (3) in central or starting position - if the rotary knob is actuated with a detent. The control spool (3) is moved to the desired spool position by means of the type of actuation (2).
Detent
Directional valves with rotary knob are generally designed with detent. Directional valves with hand lever are optionally available as 2 or 3 position valves with detent. Directional valves with roller plunger are generally designed without detent. If types of actuation with detent are used, each spool position can be fixed, depending on the valve type.
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.
Type 4WM. 6 ..5X/..B..
Type 4WMRZ 6 D6X/…
hydraulic
|
Size |
6 | ||
|
Maximum operating pressure |
Port P |
bar |
315 |
|
Port A |
bar |
315 | |
|
Port B |
bar |
315 | |
|
Port T 1) |
bar |
60 | |
|
Maximum flow |
l/min |
60 | |
|
Flow cross-section (spool position 0) |
Symbol Q |
approx. 6 % of nominal cross-section | |
|
Symbol W |
approx. 3 % of nominal cross-section | ||
|
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 2) |
Class 20/18/15 according to ISO 4406 (c) | ||
| 1) | With symbols A or B, port T must be used as leakage oil connection if the operating pressure exceeds the admissible tank pressure. |
| 2) | 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 oils |
HL, HLP, HLPD, HVLP, HVLPD |
NBR, FKM |
DIN 51524 |
|
|
Bio-degradable |
Insoluble in water |
HETG |
NBR, FKM |
VDMA 24568 |
|
HEES |
FKM |
|||
|
Soluble in water |
HEPG |
FKM |
VDMA 24568 |
|
|
Containing water |
Water-free |
HFDU, HFDR |
FKM |
ISO 12922 |
|
Containing water |
HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) |
NBR, HNBR |
ISO 12922 |
|
|
Important information on hydraulic fluids! For further information and data on the use of other hydraulic fluids, please refer to data sheet 90220 or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! The flash point of the hydraulic fluid used must be 40 K higher than the maximum solenoid surface temperature.Flame-resistant – containing water: Maximum pressure differential per control edge 50 bar. Pressure pre-loading at the tank port >20% of the pressure differential; otherwise, increased cavitation Life cycle compared to operation with mineral oil HL, HLP 50 to 100% |
||||
Actuating force/torque
|
Nenngröße |
6 | ||
|
Operating pressure |
Anschluss A |
bar |
315 |
|
Port B |
bar |
315 | |
|
Port P |
bar |
315 | |
|
Actuating force at the roller plunger |
without tank pressure |
N |
30 |
|
with tank pressure |
N |
160 | |
Calculation formula for the actuating force at the roller plunger (FR) at a tank pressure:
FR = Fwithout tank pressure + pT x 1.4 N/bar
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 | |
general
|
Size |
6 | ||
|
Weight (approx.) |
kg |
1.4 | |
|
Installation position |
any | ||
|
Ambient temperature range |
NBR seals |
°C |
-20 … +80 |
|
FKM seals |
°C |
-20 … +80 | |
For applications outside these parameters, please consult us!
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves
|
7 |
Symbol “R” in spool position "b" (A → B) |
|
8 |
Symbols “G” and “T” in central position (P → T) |
|
Symbols |
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 |
Performance limits
(measured with HLP46, ϑOil = 40 ±5 °C)
Notice!
The specified switching power limits are valid for use with two directions of flow (e. g. from P to A and simultaneous return flow from B to T).
Due to the flow forces acting within the valves, the admissible switching power limits may be considerably lower with only one direction of flow (e. g. from P to A while port B is blocked)!
In such use cases, please consult us!
|
Characteristic curve |
Symbol |
|
1 |
A,B |
|
2 |
C,D,Y,E,E1–,H,M,Q, U,W |
|
3 |
F,P |
|
4 |
G |
|
5 |
J,L |
|
6 |
R |
|
8 |
V |
|
7 |
T |
| 1) Example: Symbol E with spool position "a" → ordering code ..EA.. Symbol E with spool position “b" → ordering code ..EB.. | |
| 3) Symbol E1-: P → A/B pre-opening Caution in conjunction with differential cylinders due to pressure intensification! |
Notices!
Representation according to DIN ISO 1219-1.
Hydraulic interim positions are shown by dashes.
|
Type of actuation |
|
Roller plunger “WMRZ” 1) |
|
|
|
|
Dimensions in mm
Dimensions in mm
|
1 |
Name plate |
|
2 |
Porting pattern according to DIN 24340 form A (without locating hole), ISO 4401-03-02-0-05 and NFPA T3.5.1 R2-2002 D03 (with locating hole for locking pin ISO 8752-3x8-St, material no. R900005694, separate order) |
|
3 |
Identical seal rings for ports A, B, P, and T |
|
4 |
Alternative clamping length (): 22 mm |
|
15 |
Spool position "a" or "b" |
|
16 |
Spool position "0" |
|
17 |
Actuation on side B (depending on the piston) |
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)
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, 4WMM
Dimensions in mm
| 1) | For dimensions, see valve dimensions |
3/2 directional seat valve – with detent
Dimensions in mm
|
1 |
Cover not available for type WMRZ |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
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