Product Overview

The DREM10-5X/100YG24K4M is a Bosch Rexroth pilot-operated proportional pressure reducing valve designed for continuous hydraulic pressure regulation according to an electrical command value.

The verified model is:

DREM 10-5X/100YG24K4M

with Rexroth material number:

R900915969.

Rexroth defines the DREM family as a pilot-operated proportional pressure reducing valve. Unlike a conventional directional solenoid valve, the DREM regulates pressure through a pilot stage and main valve stage. Rexroth also identifies DREM as a version with maximum pressure limitation, providing an additional mechanical pressure-protection function.

The model code identifies:

• DREM: Proportional pressure reducing valve with maximum pressure limitation
• 10: Size 10
• 5X: Component Series 5X
• 100: 100 bar pressure rating
• Y: External, separate and depressurized pilot return
• G24: 24 VDC
• K4: 3-pole + PE electrical connection
• M: NBR seals

For OEM replacement applications, the correct configuration must be matched by pressure rating, pilot circuit, electrical interface, sealing material and mounting dimensions.

Our replacement program focuses on in-situ interchangeability and 100% simulated operating-condition testing.

Technical Specifications

DREM 10-5X/100YG24K4M

• Manufacturer: Bosch Rexroth
• Full Model: DREM 10-5X/100YG24K4M
• Material Number: R900915969
• Product Series: DREM
• Product Type: Pilot-operated proportional pressure reducing valve
• Nominal Size: Size 10
• Component Series: 5X
• Pressure Rating: 100 bar
• Control Principle: Pilot-operated proportional pressure regulation
• Electronics: External control electronics
• Supply Voltage: 24 VDC
• Pilot Return: External, separate and depressurized to tank
• Electrical Connection: K4, 3-pole + PE, EN 175301-803
• Seal Material: NBR
• Mounting: Subplate mounting
• Porting Standard: ISO 5781 family
• Maximum Operating Pressure: 315 bar for the DREM Size 10 platform
• Maximum Set Pressure: 100 bar for the specified /100 pressure-rating version
• Maximum Main-Valve Flow: up to 300 L/min on current DREM Size 10 platform data; exact 5X flow capability should be confirmed from the applicable historical characteristic curve
• Minimum Set Pressure: approximately 2 bar on DRE(M) Size 10 platform data
• Pilot Flow: approximately 0.8 L/min on current DREM Size 10 platform data
• Hydraulic Fluid Temperature: -20°C to +80°C
• Viscosity Range: 15–380 mm²/s
• Fluid Cleanliness: ISO 4406(c) Class 20/18/15
• Maximum Pressure Limitation: Integrated DREM mechanical pressure-limiting function
• Displacement: Not applicable
• Maximum Rotational Speed: Not applicable.

Ordering Code Breakdown

DREM

Pilot-operated proportional pressure reducing valve with maximum pressure limitation.

10

Nominal Size 10.

5X

Component Series 5X.

This identifies the historical component generation; current Rexroth DREM products are also offered in later series such as 6X and 7X.

100

100 bar pressure rating.

This is the pressure-setting class, not the absolute mechanical operating-pressure limit of the valve platform.

Y

External, separate and depressurized pilot-oil return to tank.

G24

24 VDC supply.

K4

3-pole electrical connector, 2 + PE, according to EN 175301-803.

Final M

NBR seals.

Key Technical Advantages

1. Pilot-Operated Proportional Pressure Regulation

The DREM uses a pilot stage together with a main valve stage to regulate pressure at the controlled port.

This architecture allows proportional pressure adjustment in industrial hydraulic systems.

2. Integrated Maximum Pressure Limitation

The DREM version includes a mechanical maximum-pressure limitation function.

Rexroth specifies this function for protecting against excessive A-port pressure caused by abnormal proportional-solenoid control conditions.

3. 100 Bar Pressure Class

The /100 version is intended for applications requiring a maximum pressure-setting level of approximately 100 bar.

The pressure-setting rating must be distinguished from the platform’s maximum working pressure of 315 bar.

4. External and Separate Pilot Return

The Y configuration routes pilot oil externally and separately to the tank at zero back pressure.

Correct implementation of this return circuit is essential for stable pilot-stage operation.

5. Linearized Pressure/Command Characteristic

Rexroth specifies a linearized pressure/command value characteristic curve for the DRE(M) family, supporting predictable pressure control through external electronics.

6. High Main-Valve Flow Capability

Current DREM Size 10 platform data specify maximum flow up to 300 L/min, with pilot flow around 0.8 L/min.

The large difference between pilot and main flow illustrates the hydraulic amplification of the pilot-operated architecture.

7. Standard Industrial Mounting

The DREM Size 10 platform uses subplate mounting and ISO 5781-related porting, supporting integration into standardized hydraulic manifolds and power units.

8. Optional A/B Check-Valve Function

Depending on the ordering code, DREM valves may include an A/B check valve to provide free-flow capability in the required direction.

This configuration must be matched during replacement.

Application Areas

Typical applications include:

• Industrial hydraulic power units
• Hydraulic clamping systems
• Machine tools
• Pressure-control circuits
• Automated production machinery
• Hydraulic test systems
• Forming and processing equipment
• Hydraulic cylinder pressure control
• Multi-pressure hydraulic systems
• Industrial proportional pressure-control systems

The primary function is proportional pressure reduction and regulation, not directional switching.

Expert Maintenance Tips

1. Keep the Y Return Circuit Separate

The Y configuration requires an external, separate and depressurized pilot return.

Return-line restriction can disturb pilot-stage pressure control and cause pressure instability.

2. Do Not Confuse 100 Bar With Maximum Working Pressure

For the specified version:

Pressure rating = 100 bar

while:

Maximum platform working pressure = 315 bar

These parameters have different engineering meanings.

3. Check the External Amplifier

The DREM 5X configuration uses external electronic control.

The troubleshooting chain should therefore include:

controller → amplifier → solenoid current → pilot stage → main spool → A-port pressure

4. Maintain ISO 4406 Class 20/18/15 Cleanliness

Rexroth specifies ISO 4406(c) Class 20/18/15 for the DREM platform.

Contamination control is especially important because the pilot stage operates with comparatively small hydraulic flow passages.

5. Verify the Proportional Solenoid

Check coil resistance, control current, connector condition and amplifier output whenever the regulated pressure drifts or fails to reach the command value.

6. Verify the A/B Check-Valve Configuration

The presence or absence of an A/B check valve can significantly affect circuit behavior.

The replacement valve should therefore be matched to the original hydraulic schematic and ordering code.

7. Keep the Subplate and Sealing Surfaces Clean

Before installation, inspect the mounting surface, O-rings, P/A/B/Y ports and fastening hardware.

8. Perform Complete Pressure-Control Testing

After replacement, verify:

24 VDC → external amplifier → command signal → proportional solenoid → pilot stage → main spool → A-port pressure

Then test zero command, intermediate commands, maximum command, pressure holding, dynamic response, leakage and maximum-pressure limitation.

Our OEM replacement program can include 100% simulated operating-condition testing to validate hydraulic performance, electrical behavior and in-situ interchangeability.