The Bosch Rexroth 4WH6GB5X (R900338199) is a high-performance direct-operated directional spool valve engineered to deliver precise control over fluid flow start/stop and direction in hydraulic systems. With a robust radial-port housing design, this model excels in applications requiring compact, reliable, and responsive flow management.

Key Features & Design

Direct-Actuated Simplicity: Eliminates pilot stages for immediate response, ideal for systems needing rapid switching.
Spring-Centered Safety: Equipped with return springs to hold the spool in a neutral position when de-energized, enhancing operational safety.
Throttle Insert Option: Optional insert in port P regulates high switching flows, preventing damage and ensuring stable performance.
Versatile Positioning:
- ..OF.. Version: Features detent mechanism to lock spool positions securely.
- ..O.. Version: Allows free spool movement without defined neutral position, offering flexibility for specific setups.

Technical Advantages

ISO/DIN Compliance: Supports porting patterns (DIN form A without locating hole and ISO with locating hole) for global compatibility.
Sensor Integration: Works with inductive position switches or contactless proximity sensors for real-time feedback.
Durable Construction: Built to handle max pressure up to [X] bar and max flow up to [Y] L/min (specify values for SEO).
Radial Port Design: Optimizes space efficiency and simplifies installation in confined hydraulic systems.

Applications
Suitable for industries requiring direct, manual or automated flow control:

Mobile machinery (tractors, forklifts)
Industrial presses and automation systems
Construction equipment (drills, loaders)
Material handling systems

Why Choose Bosch Rexroth?

Trusted Engineering: Backed by Bosch Rexroth’s expertise in hydraulic innovation.
Customization Options: Multiple versions (spring-return/detent) adapt to unique system needs.
Safety Focus: Spring-centering and optional throttle inserts mitigate risks in high-stress environments.

Considerations

Throttle Insert : Recommended for applications exceeding standard flow limits to prevent valve overload.
Subplate Requirements: Order compatible subplates separately based on system specifications.

Conclusion
The 4WH6GB5X combines direct-actuated precision with rugged durability, making it a top choice for professionals seeking reliable flow control. Its modular design, sensor compatibility, and compliance with global standards ensure seamless integration and long-term performance.

Typ 4WH 6 E5X/...

Technical date :

general

Size			6
Weight (approx.)	Valve with one actuation cylinder	kg	2
Weight (approx.)	Valve with two actuation cylinders	kg	2.2
Installation position 1)			any
Ambient temperature range	NBR seals	°C	-30 … +80
Ambient temperature range	FKM seals	°C	-20 … +80

1)	With version ../O.. (A, C and D) : horizontal

hydraulic

Size			6
Maximum operating pressure	Port P	bar	315
	Port A	bar	315
	Port B	bar	315
	Port T 1)	bar	160
Maximum flow		l/min	60
Flow cross-section (spool position 0)	Symbol Q	mm2	approx. 6 % of nominal cross-section
Flow cross-section (spool position 0)	Symbol W	mm2	approx. 3 % of nominal cross-section
Minimum pilot pressure 2)		bar	6
Maximum pilot pressure		bar	200
Pilot volume		cm³	1.23
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 3)			Class 20/18/15 according to ISO 4406 (c)
Maximum switching frequency		Hz	2

1)	With symbols A and B, port T must be used as leakage oil connection if the operating pressure exceeds the admissible tank pressure.
2)	6 ... 10 bar > tank pressure, performance limits dependent on the minimum pilot pressure, see chapter "Diagrams/characteristic curves", section "Performance limits"
3)	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 oil		HL, HLP	FKM, NBR	DIN 51524
Bio-degradable	Insoluble in water	HEES (synthetic esters)	FKM	VDMA 24568
	Insoluble in water	HETG (rape seed oil)	FKM, NBR	VDMA 24568
	Soluble in water	HEPG (polyglycols)	FKM	VDMA 24568
Other hydraulic fluids on request

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!

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