4WMR6G5X/V

Manufacturer: Bosch Rexroth

Material #: R978877191

Model : 4WMR6G5X/V

***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 4WMR6G5X/V (R978877191) 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 WM series, featuring a roller plunger type of actuation that allows for precise control over the valve's operations. The 4WMR6G5X/V valve is equipped with a detent mechanism that securely locks each spool position, ensuring stable operation and preventing unintended movements. This valve's construction includes a housing, control spool, and one or two return springs. In its de-energized state, these springs hold the control spool in its central or starting position until it is actuated. For applications requiring controlled flows during switching processes to avoid exceeding the valve's performance limit, this model can be fitted with a throttle insert in channel P. The 4WMR6G5X/V comes as a 3-way version with porting patterns that conform to DIN form A without locating holes and ISO standards with locating holes. It supports various inductive position switches and proximity sensors for contactless detection of the spool's position. The unit is specified for a maximum operating pressure of up to 315 bar and can handle maximum flow rates up to 60 liters per minute. Designed for durability and reliability in demanding applications, this Bosch Rexroth directional valve represents an effective solution for hydraulic flow direction management within various systems where manual actuation is required or preferred.

$784.00 USD

More are expected on May 29, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as May 29, 2025 when ordered in

This product is eligible for factory repair.

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4/3-, 4/2- or 3/2-way version Porting pattern according to DIN 24340 form A (without locating hole) Porting pattern according to ISO 4401-03-02-0-05 (with locating hole) Type of actuation: Roller plunger Inductive position switch and proximity sensors (contactless)

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 locked, 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 4WMR 6 E5X/…

01	02	03	04	05		06	07	08		09	10	11	12	13
	WMR	6		5X	/	no code			/		no code			*

01	3 main ports	3
01	4 main ports	4
Type of actuation
02	Roller plunger (see Dimensions)	WMR
03	Size 6	6
04	Symbols e. g. C, E, EA, EB, etc.; for the possible version, see Symbols and Types of actuation
05	Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions)	5X
06	With spring return	ohne Bez.
Corrosion protection
07	Standard corrosion protection	ohne Bez.
07	Improved corrosion protection 1)	J
Spool position monitoring 2)
08	Without position switch	ohne Bez.
	Inductive position switch type QM
	Monitored spool position "a"	QMAG24
	Monitored spool position "b"	QMBG24
	Monitored rest position	QM0G24
09	Without throttle insert	ohne Bez.
	Throttle Ø 0.8 mm	B083)
	Throttle Ø 1.0 mm	B103)
	Throttle Ø 1.2 mm	B123)
Clamping length
10	42 mm (standard)	no code
Seal material
11	NBR seals	ohne Bez.
	FKM seals	V
	Observe compatibility of seals with hydraulic fluid used. (Other seals upon request)
12	Without locating hole	ohne Bez.
	With locating hole	/604)
	With locating hole and locking pin ISO 8752-3x8-St	/62
13	Further details in the plain text	*

	1) 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.
	2) Only for valves with 2 spool positions and versions “WMR”; not for version “J”
	3) Use if flow > performance limit of the valve, effective in channel P.
	4) Locking pin ISO 8752-3x8-St, material no. R900005694, separate order

Preferred types and standard units are specified in the EPS (standard price list).

general

Size			6
Weight (approx.)		kg	1.4
Installation position			any
Ambient temperature range	NBR seals	°C	-20 … +80
Ambient temperature range	FKM seals	°C	-20 … +80

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
Flow cross-section (spool position 0)	Symbol W		approx. 3 % of nominal cross-section
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 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
	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%

Actuating force/torque

Nenngröße			6
Operating pressure	Anschluss A	bar	100	200	315
	Port B	bar	100	200	315
	Port P	bar	100	200	315
Actuating force at the roller plunger	without tank pressure	N	100	112	121
Actuating force at the roller plunger	with tank pressure	N	184	196	205

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

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
Symbols	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!