R978913000 - BuyRexroth

Manufacturer: Bosch Rexroth

Material #: R978913000

Model : M-3SEW6U3X/630MG96N9K4/B15V

$1,667.00 USD

More are expected on January 7, 2026

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Status: This product is temporarily out of stock.

Qty: Delivered as early as January 7, 2026 when ordered in

This product is eligible for factory repair.

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2/2-, 3/2- or 4/2-way version Porting pattern according to DIN 24340 form A Porting pattern according to ISO 4401-03-02-0-05 Air-gap DC solenoids with detachable coil Solenoid coil is rotatable by 90° The coil can be changed without having to open the pressure-tight chamber Electrical connection as individual connection Optional auxiliary operating device Inductive position switch and proximity sensors (contactless)

2/2 and 3/2 directional seat valve

General

The SEW type directional valve is a directional seat valve with solenoid actuation. It controls the start, stop and direction of flow.

The valve basically consists of the housing (1), the solenoid (2), the hardened valve system (3) as well as the ball/the spool (4) as closing element.

Basic principle

In the initial position, the ball/the spool (4) is pressed onto the seat by the spring (9) and by the solenoid (2) in the switching position. The force of the solenoid (2) acts via the angled lever (6) and the ball (7) on the actuating plunger (8) that is sealed on two sides. The chamber between the two sealing elements is connected to port P. Therefore, the valve system (3) is pressure-compensated in relation to the actuating forces (solenoid or return spring). Therefore, the valves can be used up to 630 bar.

Notices!

3/2-directional seat valves feature "negative spool overlap". Therefore, port T must always be connected. That means that during the switching process – from the starting of the opening of one valve seat to the closing of the other valve seat – ports P–A–T are connected with each other. However, this process takes place within such a short time that it is irrelevant in nearly all cases of use. The manual override (10) allows for the switching of the valve without solenoid energization. It is to be ensured that the maximum flow indicated is not exceeded!If applicable, a throttle insert for flow limitation is to be inserted (see functional description).

Type M-3SEW 6 U …

Type M-2SEW 6 N …

4/2 directional seat valve

With a sandwich plate, the Plus-1 plate, under the 3/2 directional seat valve, the function of a 4/2 directional seat valve is achieved.

Function of the Plus-1 plate

Initial position:

The main valve is not operated. The spring (9) holds the ball (4.1) on the seat (11). Port P is blocked and A is connected to T. Apart from that, one control line is connected from A to the large area of the control spool (12), which is thus unloaded to the tank. The pressure applied via P now pushes the ball (13) onto the seat (14). Now, P is connected to B, and A to T.

Transition position:

When the main valve is actuated, the spool (4.2) is shifted against the spring (9) and pressed onto the seat (15). During this, port T is blocked, while P, A, and B are briefly connected to each other.

Switching position:

P is connected to A. As the pump pressure acts via A on the large area of the control spool (12), the ball (13) is pressed onto the seat (16). Thus, B is connected to T, and P to A. The ball (13) in the Plus-1 plate has a "positive spool overlap".

Notices!

If the annulus area of differential cylinders is not connected to port A, a pressure peak is created in port B during the switching process due to the pressure intensification. This pressure peak may exceed the maximum operating pressure over the permissible limit.

Type M-4SEW 6 Y …

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.

Examples:

Accumulator operation, use as pilot control valve with internal pilot fluid tapping.

2/2- and 3/2 directional seat valve

The throttle insert is inserted into port P of the seat valve

4/2 directional seat valve (see functional description)

The throttle insert is inserted into port P of the Plus-1 plate.

Check valve insert

The check valve insert allows a free flow from P to A and closes A to P in a leak-free form.

2/2- and 3/2 directional seat valve (see functional description)

The check valve insert is inserted into port P of the seat valve.

4/2 directional seat valve (see functional description)

The check valve insert is inserted into port P of the Plus-1 plate.

01		02	03	04	05		06	07	08	09	10	11	12	13	14	15	16
M	–		SEW	6		3X	/		M			K4	/				*

01	Mineral oil				M
02	2 main ports				2
	3 main ports				3
	4 main ports				4
03	Seat valve, direct operated				SEW
04	Size 6				6
05	Symbols	Main ports			● = available
		2	3	4
		●	–	–	P
		●	–	–	N
		–	●	–	U
		–	●	–	C
		–	–	●	D
		–	–	●	Y
06	Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions)				3X
07	Operating pressure 420 bar				420 bar
	Operating pressure 630 bar				630 bar
08	High-power solenoid (air-gap) with detachable coil				M
09	Nominal voltage 96 V at DC solenoid with operation with AC voltage mains (AC voltage mains 110 V/120 V - 50/60 Hz with an admissible voltage tolerance of +/- 10 %)				G96
	Nominal voltage 110 V at DC solenoid with operation with AC voltage mains (AC voltage mains 110 V/120 V – 50/60 Hz with an admissible voltage tolerance of +/-10 %)				G110
	Nominal voltage 205 V at DC solenoid with operation with AC voltage mains (AC voltage mains 230 V - 50/60 Hz with an admissible voltage tolerance of +/- 10 %)				G205
	Connection to the AC voltage mains via control with rectifier. Further ordering codes for other voltages are provided in the Technical data
10	With concealed manual override (standard)				N9
	Without manual override				no code
Electrical connection
11	Individual connection
	Without mating connector; connector DIN EN 175301-803				K41)
Spool position monitoring
12	Without position switch				no code
	Inductive position switch type QM
	Monitored spool position "a"				QMAG24 2)
	Monitored spool position "b"				QMBG25 2)
13	Without check valve insert, without throttle insert				no code
	With check valve insert				P
	Throttle Ø 1.2 mm				B12
	Throttle Ø 1.5 mm				B15
	Throttle Ø 1.8 mm				B18
	Throttle Ø 2.0 mm				B20
	Throttle Ø 2.2 mm				B22
	Other orifices on request
Seal material
14	NBR seals				no code
	FKM seals				V
	Observe compatibility of seals with hydraulic fluid used. (Other seals upon request)
15	Without locating hole				no code
	With locating hole and locking pin ISO 8752-3x8-St				/62
16	Further details in the plain text				*

1) Mating connectors, separate order.

2) Version “420” only

Notice!

For other types of actuation (e.g. pneumatic, hydraulic, rotary knob, rotary knob with lock, stylus, touching lever, roller actuation), see data sheet 22340 or contact us!

general

Size			6
Weight	2/2 directional seat valve	kg	1.5
	3/2 directional seat valve	kg	1.5
	4/2 directional seat valve	kg	2.3
Installation position			any
Ambient temperature range	NBR seals	°C	-30 … +50
Ambient temperature range	FKM seals	°C	-20 … +50

hydraulic

Size			6
Maximum operating pressure	Port P	bar	420 630
	Port A	bar	420 630
	Port B	bar	420 630
Maximum flow		l/min	25
Hydraulic fluid			see table
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
Hydraulic fluid temperature range	FKM seals	°C	-20 … +80
Viscosity range		mm²/s	2.8 … 500
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1)			Class 20/18/15 according to ISO 4406 (c)

1)	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
	Insoluble in water	HEES	FKM	VDMA 24568
	Soluble in water	HEPG	FKM	VDMA 24568
Containing water	Water-free	HFDU, HFDR	FKM	ISO 12922
Containing water	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%

electrical

Voltage type			Direct voltage	AC voltage
Available voltages		V	12 / 24 / 42 / 96 / 110 / 205 / 220 1)	110 / 120 / 230
Voltage tolerance (nominal voltage)		%	± 10
Power consumption		W	30
Duty cycle		%	100
Switching time according to ISO 6403	ON (without rectifier)	ms	25 … 40
	ON (with rectifier)	ms	30 … 55
	OFF (without rectifier)	ms	10 … 15
	OFF (with rectifier)	ms	35 … 55
Maximum switching frequency	Operating pressure ≤350 bar	1/h	15000
Maximum switching frequency	Operating pressure >350 bar	1/h	3600
Protection class according to DIN EN 60529			IP65 (with mating connector mounted and locked)
Maximum surface temperature of the coil 2)		°C	120

1)	Special voltages available upon request
2)	Surface temperature > 50 °C, provide contact protection.

In the electrical connection, the protective earthing conductor (PE, grounded) is to be connected in accordance with the stipulations.

Inductive position switch type QM: electrical connection

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

The electric connection is realized via a 4-pole mating connector (separate order) with connection thread M12 x 1.

M12x1 plug-in connection

electrical

			High-performance version	Reduced power consumption “SO407”
M12x1 plug-in connections 1)			K72L
Available voltages 2)		V	24
Limited switch-off voltage peak		V	-44 … -55
Voltage tolerance (nominal voltage)		%	± 10
Power consumption		W	30	8
Duty cycle		%	100
Switching time according to ISO 6403	ON (without rectifier)	ms	25 … 40	-
	ON (with rectifier)	ms	30 … 55	-
	ON (spool symbol “C”)	ms	-	50
	ON (spool symbol “U”)	ms	-	55
	OFF (without rectifier)	ms	10 … 15	-
	OFF (with rectifier)	ms	35 … 55	-
	OFF (spool symbol “C”)	ms	-	50
	OFF (spool symbol “U”)	ms	-	15
Maximum switching frequency	Standard	1/h	15000	7200
Protection class according to DIN EN 60529 3)			IP40
Protection class according to DIN EN 61140			III
Maximum coil temperature		°C	150 4)	110 5)

1)	Mating connectors according to IEC 60947-5-2, separate order, see data sheet 08006
2)	Connection to functional low voltage with secure separation only = PELV/SELV
3)	Only with the use of the mating connectors indicated by us and with correct installation.
4)	Due to the surface temperatures of the solenoid coils, the standards ISO 13732-1 and EN 982 need to be adhered to!
5)	Due to the surface temperatures occurring at the solenoid coils, the European standards ISO 13732-1 and EN 982 need to be adhered to.

For applications outside these parameters, please consult us!

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

Δp-qV characteristic curves ‒ Check valve insert

Δp-qV characteristic curves ‒ throttle insert

Δp-qV characteristic curves ‒ 2/2 directional seat valve

Δp-qV characteristic curves, 2/3 directional seat valve

Δp-qV characteristic curves ‒ 3/2 directional seat valve

Δp-qV characteristic curves ‒ 4/2 directional seat valve

2/2 directional seat valve
P	N

3/2 directional seat valve
U	C

4/2 directional seat valve
D	Y

Inductive position switch type QM Switching logics

Version QMA

(Position switch on side B, monitored spool position "a")

Version QMA

(Position switch on side A, monitored spool position "a")

Version QMB

(Position switch on side B, monitored spool position "b")

Version QMB

(Position switch on side A, monitored spool position "b")

Performance limit (measured with HLP46, ϑoil = 40 ±5 °C)

	Symbol	Comment

2/2-way circuit (2/2 directional seat valve)	P	pp ≥ pT
	N
2/2-way circuit (3/2 directional seat valve) as unloading function only	U	Before switching from the initial position to the switching position, pressure must be applied to port A. pA ≥ pT
	C	pA≥ pT
3-way circuit	U	pp ≥ pA ≥ pT
	C
4-way circuit (flow only possible in the direction of arrow)	D	3/2 directional valve (symbol “U”) in connection with Plus-1 plate: pP > pA ≥ pB > pT
	Y	3/2 directional valve (symbol “C”) in connection with Plus-1 plate: pP > pA ≥ pB > pT

Notices!

Please observe the “General notices” on page 14! The performance limit was determined when the solenoids were at operating temperature, at 10 % undervoltage and without tank preloading.

M12x1 plug-in connection ‒ Individual connection – “K72L”

Pin 5 without function

2/2 directional seat valve

Dimensions in mm

2/2 directional seat valve

Dimensions in mm

1	Solenoid “a”
2	Concealed manual override “N9”
3	Mating connector without circuitry (separate order)
4	Mating connector without circuitry (separate order)
5	Space required to remove the coil
6	Space required to remove the mating connector
8	Name plate
9	Mounting nut, tightening torque MA = 4 Nm
10	With 3/2 directional seat valves version "420", port B is designed as blind counterbore, in version "630", it is not available. With 2/2 directional seat valves version "420", ports A and B are available as blind counterbores.
11	Identical seal rings for ports A, B, and T; seal ring for port P
13	Porting pattern according to ISO 4401-03-02-0-05 (with locating hole for locking pin ISO 8752-3x8-St, material no. R900005694, included in the scope of delivery)
14	Valve mounting screws

3/2 directional seat valve

Dimensions in mm

3/2 directional seat valve

Dimensions in mm

1	Solenoid “a”
2	Concealed manual override “N9”
3	Mating connector without circuitry (separate order)
4	Mating connector without circuitry (separate order)
5	Space required to remove the coil
6	Space required to remove the mating connector
8	Name plate
9	Mounting nut, tightening torque MA = 4 Nm
10	With 3/2 directional seat valves version "420", port B is designed as blind counterbore, in version "630", it is not available. With 2/2 directional seat valves version "420", ports A and B are available as blind counterbores.
11	Identical seal rings for ports A, B, and T; seal ring for port P
12	Porting pattern according to DIN 24340, form A
14	Valve mounting screws

4/2 directional seat valve

Dimensions in mm

4/2 directional seat valve

Dimensions in mm

1	Solenoid “a”
2	Concealed manual override “N9”
3	Mating connector without circuitry (separate order)
4	Mating connector with circuitry (separate order, see page data separate order, see data sheet 08006)
5	Space required to remove the coil
6	Space required to remove the mating connector
7	Plus-1 plate
8	Name plate
9	Mounting nut, tightening torque MA = 4 Nm
11	Identical seal rings for ports A, B, and T; seal ring for port P
12	Porting pattern according to DIN 24340, form A
13	Porting pattern according to ISO 4401-03-02-0-05 (with locating hole for locking pin ISO 8752-3x8-St, material no. R900005694, included in the scope of delivery)
14	Valve mounting screws

Valve mounting screws (separate order)

2/2 and 3/2 directional seat valve

Version “420”:

4 hexagon socket head cap screws metric

ISO 4762 - M5 x 45 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

tightening torque MA = 7 Nm ± 10 %,

material no. R913000140

4 hexagon socket head cap screws

ISO 4762 - M5 x 45 - 10.9 1)

(friction coefficient μges = 0.12 to 0.17);

tightening torque MA = 8,1 Nm ± 10 %

4 hexagon socket head cap screws UNC

10-24 UNC x 1 3/4” ASTM-574 1)

(friction coefficient μtotal = 0.19 to 0.24 according to ASTM-574);

tightening torque MA = 11 Nm ± 15 %,

(friction coefficient μtotal = 0.12 to 0.17 according to ISO 4762);

tightening torque MA = 8 Nm ± 10 %,

material no. R978802649

version “630”:

4 hexagon socket head cap screws metric

ISO 4762 - M6 x 45 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

tightening torque MA = 12,5 Nm ± 10 %,

material no. metric R913000258

4 hexagon socket head cap screws

ISO 4762 - M6 x 45 - 10.9 1)

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 15,5 Nm ± 10 %

4 hexagon socket head cap screws UNC

1/4-20 UNC x 1 3/4” ASTM-574 1)

(friction coefficient μtotal = 0.19 to 0.24 according to ASTM-574);

tightening torque MA = 20 Nm ± 15 %,

(friction coefficient μtotal = 0.12 to 0.17 according to ISO 4762);

tightening torque MA = 14 Nm ± 10 %,

material no. R978800711

4/2 directional seat valve

version “420”:

4 hexagon socket head cap screws metric

ISO 4762 - M5 x 90 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

tightening torque MA = 7 Nm ± 10 %,

material no. R913000222

oder

4 hexagon socket head cap screws

ISO 4762 - M5 x 90 - 10.9 1)

(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 3 1/2” 1)

(friction coefficient μtotal = 0.19 to 0.24 according to ASTM-574);

tightening torque MA = 11 Nmv± 15 %,

(friction coefficient μtotal = 0.12 to 0.17 according to ISO 4762);

tightening torque MA = 8 Nm ± 10 %,

material no. R978800696

version “630”:

4 hexagon socket head cap screws metric

ISO 4762 - M6 x 90 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

tightening torque MA = 12,5 Nm ± 10 %,

material no. R913000259

4 hexagon socket head cap screws

ISO 4762 - M6 x 90 - 10.9 1)

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 15,5 Nm ± 10 %

4 hexagon socket head cap screws UNC

1/4-20 UNC x 3 1/2” 1)

(friction coefficient μtotal = 0.19 to 0.24);

tightening torque MA = 20 Nm ± 15 %,

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 14 Nm ± 10 %,

material no. R978800717

1) Not included in the Rexroth delivery range

Spool position monitoring

Size	H
Size	mm
6	23
10	32.5

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

M12x1 plug-in connection

Dimensions in mm

Type M-.SEW 6 .-3X/420MG24.K72L…

Dimensions in mm

Inductive position switch type QM

Dimensions in mm

1)	For dimensions, see valve dimensions

Seat valves can be used according to the spool symbols as well as the assigned operating pressures and flows (see performance limits).

In order to ensure a safe functioning, it is absolutely necessary to observe the following:

In order to switch the valve safely and/or maintain it in its spool position, the pressure must be pP ≥ pA ≥ pT (for design reasons). Seat valves have a negative spool overlap, i.e. leakage oil occurs during the switching process. However, this process takes place within such a short time that it is irrelevant in nearly all cases of use. The specified maximum flow must not be exceeded (use a throttle insert for flow limitation, if necessary)!

Plus-1 plate:

When using the Plus-1 plate (4/2 directional function), the following lower operating values are to be observed: pmin = 8 bar; qV > 3 l/min. The ports P, A, B and T are clearly specified according to their tasks. They must not be arbitrarily exchanged or closed! With 3- and 4-way spool position, port T must always be connected. Observe the pressure level and pressure distribution! The flow is only admissible in the direction of arrow!

Mating connectors for valves with connector “K4”, without circuitry, standard

3P Z4

Mating connectors for valves with connector “K4”, without circuitry, standard

3P Z4

For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)

Data sheet

Spare parts & repair

Mating connectors for valves with connector “K4”, without circuitry, standard

3P Z45

Mating connectors for valves with connector “K4”, without circuitry, standard

3P Z45

For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)

Data sheet

Spare parts & repair

Mating connectors for valves with connector “K4”, with indicator light

3P Z5L

Mating connectors for valves with connector “K4”, with indicator light

3P Z5L

For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)

Data sheet

Spare parts & repair

Mating connectors for valves with connector “K4”, with indicator light

3P Z55L

Mating connectors for valves with connector “K4”, with indicator light

3P Z55L

For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)

Data sheet

Spare parts & repair

Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit

3P Z5L1

Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit

3P Z5L1

For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)

Data sheet

Spare parts & repair

Manufacturer: Bosch Rexroth

Material #: R978913000

Model : M-3SEW6U3X/630MG96N9K4/B15V

More are expected on January 7, 2026

This product is eligible for factory repair.

2/2 and 3/2 directional seat valve

4/2 directional seat valve

Throttle insert

Check valve insert

general

hydraulic

electrical

Inductive position switch type QM: electrical connection

electrical

M12x1 plug-in connection

electrical

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

Δp-qV characteristic curves ‒ Check valve insert

Δp-qV characteristic curves ‒ Check valve insert

Δp-qV characteristic curves ‒ throttle insert

Δp-qV characteristic curves ‒ throttle insert

Δp-qV characteristic curves ‒ 2/2 directional seat valve

Δp-qV characteristic curves ‒ 2/2 directional seat valve

Δp-qV characteristic curves, 2/3 directional seat valve

Δp-qV characteristic curves ‒ 3/2 directional seat valve

Δp-qV characteristic curves ‒ 4/2 directional seat valve

Δp-qV characteristic curves ‒ 4/2 directional seat valve

Inductive position switch type QM Switching logics

Version QMA

Version QMA

Version QMB

Version QMB

Performance limit (measured with HLP46, ϑoil = 40 ±5 °C)

M12x1 plug-in connection ‒ Individual connection – “K72L”

2/2 directional seat valve

2/2 directional seat valve

3/2 directional seat valve

3/2 directional seat valve

4/2 directional seat valve

4/2 directional seat valve

Spool position monitoring

Notice:

M12x1 plug-in connection

Type M-.SEW 6 .-3X/420MG24.K72L…

Inductive position switch type QM

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