4WS2EM10-5X/20B11ET315K8EV
Manufacturer: Bosch Rexroth
Material #: R900767011
Model : 4WS2EM10-5X/20B11ET315K8EV
***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 4WS2EM10-5X/20B11ET315K8EV (R900767011) is an advanced stage directional servo valve designed to precisely control position, force, and velocity in various applications. The valve features an electromechanical converter torque motor, hydraulic amplifier with a nozzle-flapper plate system, and a control spool within a sleeve. The torque motor operates based on an electrical input signal, creating a force that moves the flapper plate and generates a pressure differential across the control spool. This action connects the pressure port to one actuator port while linking the other actuator port to the return flow port.
The control spool's position is regulated by mechanical feedback via a bending spring until equilibrium is reached between the feedback torque and electromagnetic torque of the motor. The servo valve's flow is proportional to the electrical input signal, yet it also depends on the valve's pressure drop.
This model requires external control electronics (type WSEMX...) for operation, which are ordered separately. These electronics amplify an analog input signal to actuate the servo valve in a controlled manner. Additionally, some versions come with integrated control electronics (types WSEEMX... and WSEEDX...), which include special adjustments for this specific valve type and allow for zero point adjustments through an externally accessible potentiometer.
The 4WS2EM10-5X/20B11ET315K8EV also includes features such as wear-free control spool return elements, suitability for subplate mounting with porting patterns according to ISO standards, dry control motor design preventing contamination from hydraulic fluid, and options for external or integrated electronic controls. This servo valve is designed for maximum operating pressures up to bar and can handle maximum flows of l/min. It should be noted that any changes in the zero point should only be carried out by trained specialists to avoid system damage.
$7,604.00 USD
More are expected on September 19, 2024
Status: This product is temporarily out of stock.
Qty: Delivered as early as September 19, 2024 when ordered in
This product is eligible for factory repair.
4WS(E)2EM10-5X/...
Valves of type 4WS(E)2EM10-5X are electrically operated, 2-stage directional servo valves. They are mainly used to control position, force and velocity.
These valves are made of an electro-mechanical converter (torque motor) (1), a hydraulic amplifier (principle: nozzle flapper plate) (2) and a control spool (3) in a sleeve (2nd stage) which is connected with the torque motor via a mechanical feedback.
An electrical input signal at the coils (4) of the torque motor generates a force by means of a permanent magnet which acts on the armature (5), and in connection with a torque tube (6) results in a torque. This causes the flapper plate (7) which is connected to the torque tube (6) via a bolt to move from the central position between the two control nozzles (8), and a pressure differential is created across the front sides of the control spool. This pressure differential results in the control spool changing its position, which results in the pressure port being connected to one actuator port and, at the same time, the other actuator port being connected to the return flow port.
The control spool is connected to the flapper plate or the torque motor by means of a bending spring (mechanical feedback) (9). The position of the control spool is changed until the feedback torque across the bending spring and the electro-magnetic torque of the torque motor are balanced and the pressure differential at the nozzle flapper plate system becomes zero.
The stroke of the control spool and consequently the flow of the servo valve are controlled proportional to the electrical input signal. It must be noted that the flow depends on the valve pressure drop.
External control electronics, type 4WS2EM10-5X/... (separate order)
External control electronics (servo amplifier) serve the actuation of the valve, amplifying an analog input signal (command value) so that with the output signal, the servo valve is actuated in a flow-controlled form.
Integrated control electronics, type 4WSE2EM10-5X/... and 4WSE2ED10-5X/...
For amplification of the analog input signal, special control electronics (10) adjusted to this valve type have been integrated. They are attached to the cover cap of the torque motor. The valve zero point can be adjusted by means of an externally accessible potentiometer.
4WSE2ED10-5X/...
For the mechanical control by the return spring, valves of this type are additionally equipped with electric spool position detection and control. The control spool position is determined by means of an inductive position transducer (11). The position transducer signal is compared to the command value by the integrated control electronics (10). Any possible control deviation is amplified electrically and fed to the torque motor as control signal. With the additional electric feedback, higher dynamic values are achieved than with the purely mechanical variant due to the electric controller amplification in the small signal range. The mechanical feedback which is also available makes sure that in case the electric voltage supply fails, the valve spool is positioned in the zero range.
The valve is only available with integrated control electronics. The valve zero point can be adjusted by means of an externally accessible potentiometer.
Notice:
Changes in the zero point may result in damage to the system and may only be implemented by instructed specialists.
Type 4WS2EM 10...
(measured with HLP32, ϑOil =40 ±5 °C)
Flow/load function with maximum valve opening (tolerance ±10 %)
Tolerance field of the flow/signal function with constant valve pressure differential Δp
4WS.2EM 10, rated flow 5, 10, 20 l/min
4WSE2ED 10, rated flow 5, 10, 20 l/min
4WS.2EM 10, rated flow 5, 10, 20 l/min
4WSE2ED 10, rated flow 5, 10, 20 l/min
4WS.2EM 10, rated flow 5, 10, 20 l/min
4WSE2ED 10, rated flow 5, 10, 20 l/min
4WS.2EM 10, rated flow 30 l/min
4WSE2ED 10, rated flow 30 l/min
4WS.2EM 10, rated flow 30 l/min
4WSE2ED 10, rated flow 30 l/min
4WS.2EM 10, rated flow 30 l/min
4WSE2ED 10, rated flow 30 l/min
4WS.2EM 10, rated flow 45 l/min
4WSE2ED 10, rated flow 45 l/min
4WS.2EM 10, rated flow 45 l/min
4WSE2ED 10, rated flow 45 l/min
4WS.2EM 10, rated flow 45 l/min
4WSE2ED 10, rated flow 45 l/min
4WS.2EM 10, rated flow 60 l/min
4WSE2ED 10, rated flow 60 l/min
4WS.2EM 10, rated flow 60 l/min
4WSE2ED 10, rated flow 60 l/min
4WS.2EM 10, rated flow 60 l/min
4WSE2ED 10, rated flow 60 l/min
4WS.2EM 10, rated flow 75 l/min
4WSE2ED 10, rated flow 75 l/min
4WS.2EM 10, rated flow 75 l/min
4WSE2ED 10, rated flow 75 l/min
4WS.2EM 10, rated flow 75 l/min
4WSE2ED 10, rated flow 75 l/min
4WS.2EM 10, rated flow 90 l/min
4WSE2ED 10, rated flow 90 l/min
4WS.2EM 10, rated flow 90 l/min
4WSE2ED 10, rated flow 90 l/min
4WS.2EM 10, rated flow 90 l/min
4WSE2ED 10, rated flow 90 l/min
(measured with HLP46, ϑOil = 40 ±5 °C)
4WSE2ED 10…
4WS2EM 10…
The electrical connection can be designed as parallel or serial connection. For reasons of operational safety and the resulting lower coil inductivity, we recommend the parallel connection.
The bridge E-F can be used for electrical recognition of the correct connection of the connector or for cable break detection.
Parallel connection:
Connect contact A with B and C with D in the mating connector.
Serial connection:
Connect contact B with C in the mating connector.
Electrical control from A (+) to D (-) provides for the direction of flow P to A and B to T. Reverse electrical control provides for the direction of flow P to B and A to T.
E → F = bridge
Type 4WS2EM 10...
Type 4WSE2EM 10...
Type 4WSE2ED 10...
|
Pin assignment |
Contact |
Current control "13" |
Voltage control "9" |
|
Power supply |
A |
+ 15 V |
+ 15 V |
|
B |
- 15 V |
- 15 V |
|
|
C |
⊥ |
⊥ |
|
|
Command value |
D |
±10 mA; Re = 100 Ω |
+ 10 V; Re ≥ 50 kΩ |
|
E |
|||
|
Measuring output for control spool |
F 1) 2) |
± 10 mA → maximum load resistance 1 kΩ |
+ 10 V against ⊥; Ri = 4.7 kΩ |
|
1) |
With valves with mechanical feedback, port F is not assigned |
||
|
2) |
With nominal control spool stroke |
||
|
Current consumption at the mating connector port |
A |
max. 150 mA |
max. 150 mA |
|
B |
|||
|
D |
0 ... ±10 mA |
≤ 0,2 mA |
|
|
E |
|||
Supply voltage:
±15 V ±3 %, residual ripple < 1 %
Command value:
Command value at the mating connector port D = positive against mating connector port E results in flow from P to A and B to T. Measuring output F has positive signal against ⊥.
Command value at the mating connector port D = negative against mating connector port E results in flow from P to B and A to T. Measuring output F has negative signal against ⊥.
Measuring output:
The voltage or current signal is proportional to the control spool stroke.
Notice:
Electrical signals provided via control electronics (e.g. actual value) must not be used to switch off safety-relevant machine functions!
mechanical feedback / external control electronics, type 4WS2EM 10-5X/...
Dimensions in mm
|
1 |
Cap |
|
2 |
Mating connector, separate order |
|
3 |
Space required to remove the mating connector |
|
4 |
Exchangeable filter element with seals |
|
5 |
Profile seal for filter screw M16 x 1.5; part of item 4 |
|
6 |
Name plate |
|
7 |
Identical seal rings for port A, B, P, TA, TB |
|
8 |
Identical seal rings for ports X and Y |
|
9 |
Machined valve contact surface; Porting pattern according to ISO 4401-05-05-0-05 |
|
10 |
Valve mounting screws (included in the scope of delivery): |
|
Subplates must be ordered separately |
|
mechanical feedback / integrated control electronics, type 4WSE2EM 10-5X/...
Dimensions in mm
|
1 |
Cap with integrated control electronics |
|
2 |
Electrical zero point setting |
|
3 |
Mating connector, separate order |
|
4 |
Space required to remove the mating connector |
|
5 |
Exchangeable filter element with seals |
|
6 |
Profile seal for filter screw M16 x 1.5; part of item 4 |
|
7 |
Name plate |
|
8 |
Identical seal rings for port A, B, P, TA, TB |
|
9 |
Identical seal rings for ports X and Y |
|
10 |
Machined valve contact surface; Porting pattern according to ISO 4401-05-05-0-05 |
|
11 |
Valve mounting screws (included in the scope of delivery): |
|
Subplates must be ordered separately |
|
electric and mechanical feedback / integrated control electronics, Type 4WSE2ED 10-5X/...
Dimensions in mm
|
1 |
Cap with integrated control electronics |
|
2 |
Electrical zero point setting |
|
3 |
Mating connector, separate order |
|
4 |
Space required to remove the mating connector |
|
5 |
Exchangeable filter element with seals |
|
6 |
Profile seal for filter screw M16 x 1.5; part of item 4 |
|
7 |
Name plate |
|
8 |
Identical seal rings for port A, B, P, TA, TB |
|
9 |
Identical seal rings for ports X and Y |
|
10 |
Machined valve contact surface; Porting pattern according to ISO 4401-05-05-0-05 |
|
11 |
Valve mounting screws (included in the scope of delivery): |
|
Subplates must be ordered separately |
|
Flushing plate with porting pattern according to ISO4401-05-05-0-05
Dimensions in mm
|
1 |
R-ring 13.0 x 1.6 x 2.0 (ports P, A, B, T, T1) |
|
2 |
R-ring 11.18 x 1.6 x 1.78 (ports X, Y) |
|
3 |
Mounting screws (included in the scope of delivery):4 hexagon socket head cap screws ISO 4762 - M6 x 50 - 10.9-flZn-240h-L |
To ensure proper operation of the servo valves, it is necessary to flush the system before commissioning.
The following values are guidelines for the flushing time per system: t ≥ V : QV x 5
t = flushing time in h
V = tank capacity in l
QV = Pump flow in l/min
When replenishing more than 10% of the tank capacity, the flushing procedure must be repeated.
The use of a directional valve with port according to ISO 4401-05-05-0-05 is suited better than a flushing plate. With this valve, you can also flush the actuator ports.
Mating connectors for valves with round connector, 6-pole + PE
7P Z31
Mating connectors for valves with round connector, 6-pole + PE
7P Z31
For valves with round connector according to EN 175201-804, 6-pole + PE as well as 6-pole, compatible with VG 95328Data sheet
Spare parts & repair
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