3WH Series Electromagnetic Directional Valve| Bosch Rexroth
Boost Performance with 3WH Series Electromagnetic Directional Valve by Bosch Rexroth
Experience precision and reliability with the Bosch Rexroth 3WH Series Electromagnetic Directional Valve from LOYAL INDUSTRIAL PTE. LTD. Perfect control for your hydraulic systems, upgrade today!
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Choose Bosch Rexroth’s 3WH Series Electromagnetic Directional Valve for unmatched precision and reliability. Elevate your hydraulic systems to new heights—invest in excellence today!

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3WH Series Function And Performance
Function and Operation
- Flow direction control for fluids with different actuation methods.
- The main valve has a housing, main control spool, return springs and pilot valves.
- By moving the main control spool to guide flow between ports P, A, B and T; pilot valves work.
Performance Limits And Adjustments
- Different spool types have characteristic curves.
- Switching performance is bounded by the flow direction and pressure.
- It uses pressure reducing valves together with pre-load valve to regulate pilot pressure.


Features and Applications of the 3WH Series Electromagnetic Directional Valve
Features:
- Many ways to Actuate: Examples are pneumatic-hydraulic, hydraulic-hydraulic, and mechanical-hydraulic.
- Mounting on Subplate: It complies with ISO 4401 and NFPA T3.5.1 R2-2002 standards for easy installation.
- Control Enhancement: For precise spool positioning, it has spring centering, spring end position, and hydraulic end position.
- Manual Override: Optional feature for emergency or manual operation.
- Time Switching Adjustability: This controls the time the valve takes to respond.
- Pre-load Valve: Optional integration that keeps hydraulic pressure consistent.
- Adjustment of Spool and Stroke: Can be customized to fit specific applications.
- Position Monitoring: Contactless sensors and inductive position switches ensure accurate spool position monitoring.
- Strong Design: It can handle up to 350 bar (5076 psi) and 1100 l/min (290 US gpm).
Applications:
- Industrial Automation: Machinery control needs precision hydraulics.
- Mobile Hydraulics: Construction equipment such as bulldozers, loaders, backhoes, etc.
- Manufacturing: Injection molding machines, presses, assembly lines, etc.
- Energy Sector: Oil, gas, and renewable energies require high-pressure systems with large flow rates.
- Marine and Offshore: Ship steering systems, deck machinery, underwater devices where robust controls are necessary.
The 3WH Series Electromagnetic Directional Valve is perfect for many different types of industrial use because it is multifunctional, reliable, precise, versatile, and durable.
3WH Series Mounting And Controlling
Mounting and porting
- Subplate mounting standard is ISO 4401 or NFPA T3.5.1 R2-2002.
- Different subplates for various configurations.
Controlling and Adjusting Options
- Spring centering/spring end position/hydraulic end position.
- Manual override (optional).
- Switching time adjustment (optional).
- Pre-load valve in channel P of the main valve (optional).
- Main spool stroke adjustment (optional).
- Main spool stroke adjustment/End position check (optional).
- Inductive position switches available, as well as proximity sensors.

3WH Series Electromagnetic Directional Valve :Technical Specifications Overview Table
Parameter | Details |
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Product Type | 3WH Series Electromagnetic Directional Valve |
Size | 6 |
Component Series | 6X (WP), 5X (WH) |
Maximum Operating Pressure | 315 bar (4600 psi) |
Maximum Flow | 60 l/min (15.8 gpm) |
Valve Actuation Types | Pneumatic (WP, WPZ), Hydraulic (WH, WHZ) |
Port Patterns | DIN 24340 Form A, ISO 4401-03-02-0-05, NFPA T3.5.1 MR1, ANSI B93-7 D03 |
Spool Positions | 2 positions, 3 positions |
Order Code | 3WH 6 A5X/ R900472229, 4WH 6 D5X/ R900449957, 4WH 6 E5X/ R900476667, 4WH 6 J5X/ R900470475, 4WH 6 Y5X/ R900470211 |
Seal Material | NBR, FKM |
Operating Temperature Range | -30 to +80°C (-22 to +176°F) for NBR seals, -20 to +80°C (-4 to +176°F) for FKM seals |
Hydraulic Fluid | Mineral oil (HL, HLP) to DIN 51524, biodegradable fluids to VDMA 24568, HETG, HEPG, HEES |
Viscosity Range | 2.8 to 500 mm²/s (35 to 2320 SUS) |
Contamination Class | ISO 4406 (c) Class 20/18/15 |
Pilot Pressure | 4 bar (minimum), 10 bar (maximum) |
Performance Limits | Refer to characteristic curves and power limits in PDF |
The Bosch Rexroth 3WH Series Electromagnetic Directional Valve is a versatile and robust hydraulic component, featuring various actuation types (pneumatic and hydraulic), high maximum operating pressure (315 bar), and compatibility with multiple port patterns.


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Safety Instructions for Rexroth Electromagnetic Directional Valve
Here are a few directions that should be followed for the safe use of 3WH series electromagnetic directional valves:
- Operating Pressure:Maximum pressure in bars for channels P, A and B is 350 (5076 psi).
- Tank port T: max 250 bar (3626 psi), internal drain port Y: max 160 bar (2321 psi).
- Hydraulic Fluids:According to DIN 51524, you’re supposed to use mineral oil (HL, HLP) and biodegradable fluids as per VDMA 24568.
The fluid temperature range is from -30°C to +80°C.
- Contamination Control:Fluid cleanliness should be maintained at ISO 4406 class 20/18/15 standards.
- Installation:It’s recommended that these devices be installed vertically, particularly when hydraulic spool returns are involved.
- Manual Override:If necessary this can be done but not exceeding the tank pressure of 50 bar.
Temperature Range:
- Ambient: -30°C to +50°C, Storage: -20°C to +70°C.
- Surface Protection:Paint coating with maximum thickness being 100 μm.
- Usage Notes:Be careful when using single rod cylinders because there might be pressure intensification.
For pilot pressures above 250 bars employ the use of a Pressure Reducing Valve “D3” together with Throttle Insert “B10” on the pilot valve.
Bosch Rexroth 3WH Series Electromagnetic Directional Valve Catalog
Model | Order Number | Price (USD) | Contact Us |
---|---|---|---|
3WH 6 A52 | R900472229 | 278.9 | Inquiry about this Parts |
3WH 6 B52 | R900472230 | 158.31 | Inquiry about this Parts |
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Interested in learning more about our products and how they can benefit your operations? Visiting our official website or reaching out to our customer service team through official channels will provide you with all the information and assistance you need.
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Common questions about the 3WH Series Electromagnetic Directional Valve
Explore the advantages of the Rexroth 3WH Series Electromagnetic Directional Valve for enhanced performance.
Q:How does it achieve high precision in fluid control?
A:High precision is achieved through advanced design which includes well engineered spool with minimum internal leakage; moreover electromagnetic solenoid ensures accurate and consistent movement of valve spool thereby allowing precise flow rate regulation based on quantity demanded at any given moment while robust construction coupled with utilization of high quality materials further contribute towards attaining such level.
Q:What are its voltage/current requirements during operation?
A:These valves may come in different voltage ratings ranging from 12V DC up to 220V AC; similarly they have various models each having unique current consumption specifications but generally speaking this value falls within range of 0.1 – 2.0 amps depending on selected voltage category hence one should check technical details specific model being used.
Q:Can these valves work under high pressure conditions?
A:Yes, designed for working in environments characterized by elevated levels of pressure; thus maximum operating pressure usually ranges between 250 bar (3625 psi) and 350 bar (5075 psi) while proof pressures are typically rated at around 1½ times more than highest expected operational pressure thereby making them robust enough to withstand extreme situations without failure.
Q:How should I maintain my 3WH Series valves for best performance?
A:In case where there is no response at all then it would be prudent enough first check whether power supply delivers correct voltage levels along with required current strength; thereafter continuity of solenoid coil should also be established and if found defective replacement must done immediately but suppose erratic operation take place other things need considering such as control signal problems fluid contamination inside valve blockage so on which can avoided through regular inspection/maintenance exercises.
Q:Are these energy-saving devices?
A:Absolutely yes because they come equipped with low-power solenoids besides having internally optimized mechanisms that help cut down energy consumption thus lowering operational costs which in turn makes them environmentally friendly too.
Q:Why choose 3WH Series over other types?
A:There are several benefits associated with using this kind rather than others including higher accuracy control; quickness during response time; durability feature being made possible by its construction method involving employment of strong materials coupled with design concept aimed at ensuring toughness against various forces encountered while operating under different conditions also saves power most especially when compared to hydraulic pneumatic manual valves etc., therefore offering unbeatable performance flexibility reliability all rolled into one package suitable for wide application range.
Q:What are some innovations that can be expected with electromagnetic directional valves going forward?
A:For electromagnetic directional valves in future, there could be IoT incorporation for live tracking & control, advanced materials such as composites & nanotechnology to improve durability, energy saving through low power solenoids enhanced with AI driven control systems and self repairing substances. These improvements will further enhance their performance reliability and sustainability.