Description
Product Introduction
The Rexroth H-4WEH25C67/6EG24N9TK4 Directional Spool Valve, material number R900244822, is a pilot-operated, electro-hydraulic directional control valve manufactured by Bosch Rexroth. It is designed to control the direction of hydraulic fluid flow in industrial hydraulic systems and machinery.
The valve uses an electrically actuated pilot stage to control the main spool, directing hydraulic fluid through the appropriate ports according to the valve’s spool configuration. This design supports the operation of hydraulic actuators, cylinders, and motors in industrial equipment requiring controlled movement and positioning.
This model belongs to the H-4WEH25 family, with nominal size 25, a C-type spool configuration, and a 24 V DC pilot solenoid. It is intended for subplate mounting in compatible hydraulic circuits. The complete type code must be matched to the original installation to ensure the correct spool function, pilot oil arrangement, electrical connection, and seal material.
Rexroth H-4WEH25C67/6EG24N9TK4
Key Features
- Electro-Hydraulic Operation: Electrical pilot control operates the main hydraulic spool.
- Directional Flow Control: Directs hydraulic fluid between pressure, tank, and actuator ports.
- Nominal Size 25: Designed for hydraulic systems using the corresponding NG25 mounting interface.
- 24 V DC Solenoid: Uses a 24 V DC pilot solenoid configuration.
- High-Pressure Capability: The H-WEH valve family supports operating pressures up to 350 bar, subject to the specific port and configuration limits.
- Subplate Mounting: Designed for installation on a compatible hydraulic manifold or mounting plate.
- Industrial Applications: Suitable for compatible hydraulic power units, machine tools, production machinery, and other industrial equipment.
Product Datasheet
| Parameter | Description |
|---|---|
| Brand | Bosch Rexroth |
| Model | H-4WEH25C67/6EG24N9TK4 |
| Material Number | R900244822 |
| Series | H-4WEH Pilot-Operated Directional Valves |
| Product Name | Electro-Hydraulic Directional Spool Valve |
| Valve Type | Pilot-operated directional control valve |
| Nominal Size | 25 (NG25) |
| Spool Symbol | C |
| Actuation | Electro-hydraulic |
| Pilot Solenoid Voltage | 24 V DC |
| Maximum Operating Pressure | Up to 350 bar, subject to port and configuration limits |
| Maximum Flow | Up to 700 L/min for the listed NG25 configuration; verify operating limits for the exact circuit |
| Mounting | Subplate mounting |
| Electrical Connection | K4 connector configuration; verify connector details and whether a mating plug is included |
| Seal Material | NBR, subject to confirmation of the complete configuration |
| Place of Manufacture / Origin | Not verified for the individual unit |
| Product Status | Confirm current condition with the seller |
| Dimensions | Refer to the manufacturer’s dimensional drawing |
| Weight | Approximately 17 kg; exact weight depends on the valve configuration |
| Country of Origin | Confirm from the product label |
| Power Requirements | 24 V DC pilot solenoid |
| Discontinued | Current lifecycle status not verified |
Installation and Compatibility Notes
- Verify the full material number: Match R900244822 and the complete type code against the original valve and hydraulic schematic.
- Check the spool symbol: The C-type spool determines the hydraulic flow paths. Confirm that it provides the required actuator behavior in the neutral or switched state.
- Confirm pilot oil requirements: Verify whether the circuit uses internal or external pilot supply and return, and check the required pilot pressure.
- Check electrical specifications: Confirm the 24 V DC supply, connector configuration, wiring polarity, and solenoid requirements before energizing the valve.
- Verify fluid and seals: Confirm that the hydraulic fluid is compatible with the specified NBR seals and the valve’s approved operating range.
- Install safely: Depressurize the hydraulic system, isolate electrical power, and follow the manufacturer’s installation and commissioning instructions.
- Test after replacement: Check for leakage, correct switching, pressure stability, and the expected movement of connected actuators before returning the machine to service.
Frequently Asked Questions
Q1: What is the Rexroth R900244822 used for?
It is a pilot-operated directional spool valve used to control hydraulic fluid flow in compatible industrial hydraulic systems.
Q2: What voltage does this valve require?
The listed configuration specifies a 24 V DC pilot solenoid. Verify the nameplate and wiring documentation before connecting power.
Q3: What is the maximum operating pressure?
The H-WEH family supports pressures up to 350 bar, but the allowable pressure must be checked for the exact valve, port, and operating configuration.
Q4: Can this valve replace another H-4WEH25 valve?
Not necessarily. The spool symbol, component series, pilot arrangement, electrical connection, seal material, and complete material number must be compatible.
Q5: Is the mating electrical connector included?
The K4 designation identifies an electrical connection configuration. Whether the mating plug is included depends on the supplied item and should be confirmed with the seller.
Q6: What should I check before ordering?
Confirm the complete model code, material number R900244822, solenoid voltage, mounting interface, spool configuration, seal material, and item condition.
Recommended Related Rexroth Models and Components
The following Bosch Rexroth products are related hydraulic control components. They have different configurations or functions and should not be treated as direct replacements without checking the hydraulic schematic and technical specifications.
- H-4WEH25C6X/6EG24N9K4 — Related NG25 directional valve configuration with a C-type spool and 24 V DC solenoid; verify the pilot and connection options.
- H-4WEH25J6X/6EG24N9K4 — NG25 directional valve with a J-type spool configuration.
- H-4WEH25E6X/6EG24N9K4 — NG25 directional valve with an E-type spool configuration.
- H-4WEH25D6X/6EG24N9K4 — Related directional valve configuration; confirm spool and actuation requirements.
- H-4WEH16E7X/6EG24N9TK4 — NG16 electro-hydraulic directional valve.
- H-4WEH32 Directional Valve — Larger nominal-size valve family for compatible high-flow hydraulic circuits.
- 4WE6 Directional Valve — Direct-acting solenoid directional valve family for smaller hydraulic circuits.
- 4WE10 Directional Valve — Solenoid-operated directional valve family for compatible medium-flow applications.
- 4WEH16 Directional Valve — Pilot-operated directional valve family in nominal size 16.
- 4WEH25 Directional Valve — Related nominal-size 25 pilot-operated valve family.
- 4WEH32 Directional Valve — Pilot-operated directional valve family in nominal size 32.
- DB Pressure Relief Valve — Pressure-control component used to limit hydraulic system pressure.
- Z2FS Sandwich Plate Valve — Flow-control component for compatible modular hydraulic assemblies.
- Z2DB Pressure Relief Valve — Modular pressure-control component for compatible hydraulic circuits.
- Rexroth Hydraulic Power Unit Components — Related pumps, filters, manifolds, and pressure-control components for hydraulic systems.
Confirm the exact material numbers and technical data before selecting any related item as a replacement.
Purchasing Reminder
Before purchasing, compare the complete type code and material number R900244822 with the existing valve. Verify the spool configuration, pilot oil arrangement, electrical connection, seal material, and mounting interface. Ask the seller to confirm the item’s condition, functional testing status, and whether any mating electrical connector or accessories are included.
