BOSCH REXROTH
R901362784

BOSCH REXROTH
Material:R901362784
Model:4WSE3E16V300E2X/VXT9/15K31C1

Due to extremely high demand, please call 877-366-7226 for availability

***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 4WSE3E16V300E2X/VXT9/15K31C1 (R901362784) is a sophisticated stage directional servo valve designed for precise control of position, force, pressure, and velocity in hydraulic systems. This high-performance valve features a pilot control valve of type WSEM, a main stage with a control spool in a sleeve, an inductive position transducer for accurate spool positioning, and integrated control electronics for seamless operation. The electromechanical converter torque motor within the pilot control valve operates on the nozzle flapper plate principle to produce a pressure differential that actuates the main control spool. This action is proportional to the electrical input signal received by the torque motor. The inductive position transducer continuously monitors the main control spool's position and feeds this information back to the integrated electronics, ensuring any deviations from the command value are quickly corrected. The flow through the servo valve is directly proportional to this command value and is also dependent on the pressure differential across the valve. For maintenance purposes, it's worth noting that only Bosch Rexroth specialists are authorized to perform service on this component except for replacing the filter element which is accessible from outside. The unit comes factory-set with an optimized dither frequency and has an externally adjustable potentiometer for zero point calibration. This servo valve has been designed for subplate mounting with porting patterns according to ISO standards and can function as a 3-way version if needed. It boasts high dynamics with excellent response sensitivity, minimal hysteresis, and negligible zero-point drift. The maximum operating pressure of this device is rated at 315 bar with a maximum flow rate of 300 liters per minute, making it suitable for demanding applications requiring precise hydraulic control.

Valves of type 4WSE3E... are electrically operated, 3-stage directional servo valves. They are mainly used to control position, force or pressure and velocity.

These valves consist of a 2-stage pilot control valve of type 4WS2EM 6 (1), a main stage with a main control spool in a sleeve (2), an inductive position transducer (3), and the integrated control electronics (4).

The pilot control valve (1) consists of an electro-mechanical converter (torque motor), a hydraulic amplifier (nozzle flapper plate principle) and a pilot spool in a sleeve, which is connected to the torque motor via a mechanical feedback.

Electric currents in the coils of the torque motor generate a force by means of a permanent magnet which acts on the armature, and in connection with a torque tube results in a torque. This causes the flapper plate which is connected to the torque tube via a bolt to move from the central position between the two control nozzles, and a pressure differential is created across the front sides of the pilot control spool. The 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 pilot control spool is connected to the flapper plate or the torque motor by means of a bending spring (mechanical feedback). The position of the control spool is changed until the flapper plate position and hence the pressure differential across the nozzle flapper plate system becomes zero due to the feedback torque, which acts via the bending spring against the electro-magnetic torque of the torque motor.

In doing so, the stroke of the pilot control spool and hence the flow of the pilot control valve is controlled proportionally to the electrical input signal.

In the main stage, the main control spool (2) is operated by the pilot control valve and its position is sensed by an inductive position transducer (3). The position transducer signal is compared to the command value by integrated control electronics (4). Any possible control deviation is amplified electrically and fed to the pilot control valve as control signal. The pilot control valve starts to move and the main control spool is re-positioned.

The stroke of the main control spool and consequently the flow of the servo valve are controlled proportionally to the command value. It must be noted that the flow depends on the valve pressure differential.

The valve zero point can be adjusted by means of an externally accessible potentiometer.

The valves are set at the factory with a dither default setting with the constant frequency of 400 Hz.

Notice!

Changes in the zero point and/or the dither amplitude may result in damage to the system and may only be implemented by instructed specialists.

The pilot control valve may only be maintained by Bosch Rexroth employees. An exception to this is the replacement of the filter element.

technical illustration-R901362784-Valve to control position, force, pressure or velocity 3-stage servo valve with electrical position control of the control spool of the 3rd stage, position sensing of the control spool by means of an inductive position transducer 2-stage pilot control valve of size 6 with high dynamics 1st stage nozzle/flapper plate amplifier Filter for 1st stage freely accessible and replaceable from the outside For subplate mounting: Porting pattern according to ISO 4401 Can also be used as 3-way version Valve and integrated control electronics are adjusted and tested Optimized valve control loop High response sensitivity, very low hysteresis and zero point drift Internal or external pilot oil supply and pilot oil return available Gap seals at pressure chambers of the control sleeve, no O-ring wear

01	02	03	04	05	06		07		08	09	10		11	12	13	14
4WSE3E	16					-	2X	/				/		K31		*

01	3-stage servo valve	4WSE3E
02	Size 16	16
03	Symbols; for the possible version, see "Symbols/Circuit diagrams"	V, V1
Control spool position in de-energized state
04	Not defined	no code
	100 % P→A / B→T	P
Rated flow at 70 bar valve pressure differential
05	105 l/min	100
	150 l/min	150
	200 l/min	200
	260 l/min	300
Control spool overlap
06	0 ... 0,5 % positiv	D
06	0 ... 0,5% negativ	E
07	Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) - Size 6	2X
Seal material
08	FKM seals	V
08	NBR seals	M
Pilot flow
09	External pilot oil supply, external pilot oil return	XY
	External pilot oil supply, internal pilot oil return	XT
	Internal pilot oil supply, external pilot oil return	PY
	Pilot oil supply internal, pilot oil return internal	PT
Pressure rating
10		7
10	315 bar	9
Power supply
11	±15 V	15
11	+24 V	24
Electrical connection
12	6+PE, ohne Leitungsdose	K31
Electrical interface
13	0 ... 10 V	A1
	0 ... 10 mA	C1
	4 ... 20 mA	F1 1)
14	Further details in the plain text	*
1)	Only with +24V supply voltage

For applications outside these parameters, please consult us!

general

Type		4WSE3E
Size		16
Component series		2X
Porting pattern		according to ISO 4401
Installation position		any - if it is ensured that the pilot control is supplied with sufficient pressure (> 10 bar) during start-up of the system. In case of insufficient pressure supply, the control spool of the servo valve can take any position. This may result in channel P being connected to the actuator and the pressure build-up being delayed. This may be prevented by providing an external pressure supply at port X.
Storage temperature range	°C	-20 … +80
Weight	kg	9.5
Ambient temperature range	°C	-20 … +60

hydraulic

Type				4WSE3E
Maximum operating pressure			bar	350
Maximum operating pressure	Port A	Internal pilot oil	bar	315
	Port B	Internal pilot oil	bar	315
	Port P	Internal pilot oil	bar	315
	Port A	External pilot oil	bar	350
	Port B	External pilot oil	bar	350
	Port P	External pilot oil	bar	350
Operating pressure range	Pilot control stage	Pilot oil supply	bar	10 ... 210 bar bzw. 10 ... 315 bar (je nach Druckstufe)
Maximum return flow pressure	Port T	Pilot oil return, external	bar	250
	Port T	Pilot oil return, internal	bar	Pressure peaks < 100, static < 10
	Port Y		bar	Pressure peaks < 100, static < 10
Rated flows qv nom at 70 bar valve pressure differential (35 bar/control edge) 1)			l/min	105
Zero flow				See characteristic curves
Hydraulic fluid				see table
Hydraulic fluid temperature range			°C	-20 … +80
Hydraulic fluid temperature range	preferably		°C	+40 … +50
Hysteresis (dither-optimized)			%	≤ 0.1
Range of inversion (dither-optimized)			%	≤ 0.05
Response sensitivity (dither-optimized)			%	≤ 0.05
Pressure amplification 2)			%	≥ 90
Zero shift upon change of	Hydraulic fluid temperature		%/10 K	≤ 0.3
	Ambient temperature		%/10 K	≤ 0.3
	Operating pressure 80 … 120 % of pP		%/100 bar	≤ 0.3
	Return flow pressure 0 … 10 % of pP		%/100 bar	≤ 0.3

1)	Tolerance ±10 % with valve pressure differential Δp = 70 bar
2)	of pp with 1 % spool stroke change (from the hydraulic zero point)

Hydraulic fluid	Classification	Suitable sealing materials	Standards
Mineral oils and related hydrocarbons	HL, HLP	NBR / FKM	DIN 51524
Flame-resistant - containing water	HFC	NBR	ISO 12922
Important information on hydraulic fluids: For more information and data on the use of other hydraulic fluids please contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). Flame-resistant – containing water: The maximum pressure differential per control edge is 210 bar. Otherwise, there is increased cavitation erosion! Tank preloading < 1 bar or > 20% of the pressure differential of the tank edge The pressure peaks should not exceed the maximum operating pressures! Maximum fluid temperature 60°C

electrical

Type		4WSE3E
Size		16
Protection class according to EN 60529		IP65 (with mating connector mounted and locked)
Type of signal		analog

(measured with HLP46, ϑOil = 40 ±5 °C)

Flow/load function with maximum valve opening (tolerance ±10 %)

Summated edge Δpv = 70 bar

Single edge Δpv = 35 bar (tolerance ±5 %)

Pressure-signal characteristic curve

Zero flow, total, with “D” overlap (pilot control valve and main stage), tolerance ±20 %

Zero flow Data valid for overlap "E"	Pilot control valve L1	l/min
Zero flow Data valid for overlap "E"	Complete valve qV	l/min
qvnom	Rated flow (complete valve) in l/min	105, 150, 200, 260
pp	Operating pressure in bar
Δp	Valve pressure differential in bar	70
qv	l/min	100, 150, 200, 300

Transition function with pressure rating 210 bar

Frequency response with pp = 210 bar - measured with pressure rating 210 bar

Dependency of the frequency f at -90° of the pilot pressure - measured with 210 bar pressure rating

Transition function with pressure rating 315 bar

Frequency response with pp = 315 bar - measured with pressure rating 315 barbar

Dependency of the frequency f at -90° of the pilot pressure - measured with 315 bar pressure rating

Type 4WSE3E...

Symbol

With control spool symbol V, the following applies:
P → A: qVmax; B → T: qVmax
P → B: qVmax; A → T: qVmax
With control spool symbol V1-, the following applies:
P → A: qVmax; B → T: qV /2
P → B: qV /2; A → T: qVmax

Electrical interface Pin		A1	C1	F1
Current consumption at the mating connector port	A	< ±150 mA with ±15 V < 200 mA with 24 V		< 200 mA with 24 V
	B
	D	0 ... ±0,05 mA	0 ... ±10 mA	4 ... 20 mA
	E

Pin assignment	Contact	Supply voltage 15		Supply voltage 24
Interface		A1	C1	A1	C1	F1
Power supply	A	+ 15 VDC		+ 24 VDC
	B	- 15 VDC		0 VDC
M0	C	Reference to A, B 0 VDC		not assigned
Differential command value input	D	0 ... ± 10 V; Re > 100 kΩ	0 ... ± 10 mA; Re = 100 Ω	0 ... ± 10 V; Re > 100 kΩ	0 ... ± 10 mA; Re = 100 Ω	4 ... 20 mA; Re = 100 Ω
	E
Actual value Reference with +24 V is pin B Reference with ±15 V is pin C	F	0 ... ± 10 V; Ri ≈ 1 kΩ	0 ... ±10 mA; load max. 1 kΩ	0 ... ± 10 V; Ri ≈ 1 kΩ	0 ... ±10 mA; load max. 1 kΩ	4 ... 20 mA; load max. 500 Ω
Protective earthing conductor	PE	connected to valve housing
One end of the shield must be connected to the control!

Supply voltage:

±15 V ±3 %, residual ripple < 1 %

+24 VDC / 18 ... 35 V; full bridge rectification with smoothing capacitor 2200 μF = Imax = 230 mA

Command value: A1, C1:

Reference potential at E and positive command value at D result in flow from P → A and B → T.

Reference potential at E and negative command value at D result in flow from P → B and A → T.

F1:

Reference potential at E and signal 12 to 20 mA at D result in flow from P → A and B → T.

Reference potential at E and signal 12 to 4 mA at D result in flow from P → B and A → T.

Actual value / measuring output:

The voltage / current signal is proportional to the control spool stroke and has the same sign as the command value.

Connection cable:

Recommendation:

up to 25 m line length: Type LiYCY 7 x 0.75 mm2 up to 50 m line length: Type LiYCY 7 x 1.0 mm2

Connect shield to ⊥ only on the supply side.

Notice:

Electrical signals provided via valve electronics (e.g. actual value) must not be used to switch off safety-relevant machine functions!

Block diagram / pin assignment

Dimensions in mm

1	Name plate complete valve
2	Name plate pilot control valve
3	Mating connector, separate order
4	Space required to remove the mating connector
5	PVC cable not resistant when in contact with HFD-R fluid
6	Locating pin (2x) G1 and G2
7	Cover plate (for transport only)
8	Pilot control valve (2-stage)
9	Main stage (3rd stage)
10	Integrated electronics (OBE)
11	Identical seal rings for ports A, B, P, and T
12	Identical seal rings for ports X and Y The ports X and Y are also pressurized in the case of "internal" pilot oil supply
13	Machined valve contact surface; Porting pattern according to ISO 4401-07-07-0-05
14	Exchangeable filter element with seals
15	Valve mounting screws (included in the scope of delivery): 2 hexagon socket head cap screws ISO 4762 - M6 x 60- 10.9-flZn-240h-L Tightening torque MA = 12.5 Nm ±10 % 4 hexagon socket head cap screws ISO 4762 - M10 x 60- 10.9-flZn-240h-L Tightening torque MA = 58 Nm ±10 % (Tightening torque refers to the maximum operating pressure)
16	Hexagon nuts (for transport only)

Flushing plate with porting pattern according to ISO 4401-07-07-0-05

Dimensions in mm

1	R-ring 10 x 2 x 2 (ports L, X, Y) included in scope of delivery
2	R-ring 22.53 x 2.30 x 2.62 (ports P, T, A, B) included in scope of delivery
3	Mounting screws (included in the scope of delivery):2 hexagon socket head cap screws ISO 4762 - M6 x 70- 10.9-flZn-240h-L, MA = 15.5 Nm ± 20 %
4	Mounting screws (included in the scope of delivery):4 hexagon socket head cap screws ISO 4762 - M10 x 70- 10.9-flZn-240h-L, MA = 75 Nm ± 20 %
5	2 locating pins 3 x 8 - A2C DIN EN 28741
6	Name plate

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 4401-07-07-0-05 is suited better than a flushing plate. With this valve, you can also flush the actuator ports.