DA6VP2-4X/200-10M Rexroth Pressure Cut-Off Valve

Product Overview

The DA6VP2-4X/200-10M is a Bosch Rexroth DA 6 VP pilot-operated pressure cut-off valve, designed for hydraulic circuits requiring controlled pump unloading and accumulator pressure management. The DA 6 V family is used to switch pump flow between the hydraulic system and the tank according to adjustable upper and lower switching pressures.

Unlike a conventional direct-acting relief valve, the DA 6 VP uses a pilot-controlled main stage. When the upper switching pressure is reached, the main stage switches the pump flow from P to B operation toward a low-pressure P to T circulation condition. When system pressure falls to the lower switching point, the valve returns the pump to system supply.

This operating principle makes the valve particularly suitable for hydraulic accumulator charging circuits, pump unloading systems and industrial hydraulic power units where reducing unnecessary high-pressure circulation is important.

Bosch Rexroth material documentation identifies R900052037 as DA 6 VP2-4X/200-10M.

For replacement applications, the complete type code, pressure stage, sealing configuration, porting and control arrangement should be verified before installation.

Technical Specifications

• Manufacturer: Bosch Rexroth
• Series: DA 6 V
• Full model: DA6VP2-4X/200-10M
• Material Number: R900052037
• Valve type: Pilot-operated pressure cut-off valve
• Nominal size: Size 6 / NG6
• Mounting: Subplate mounting
• Pressure stage: 200 bar
• Adjustment range for 200-bar pressure stage: 100–200 bar
• Maximum operating pressure: 350 bar
• Maximum flow: 40 L/min
• Control principle: Pilot-operated pressure cut-off
• Switching pressure differential: Adjustable from 10% to 50% of nominal pressure
• Installation position: Any
• Approximate mass: 2.2 kg
• Ambient temperature with NBR seals: −30 to +80 °C
• Ambient temperature with FKM seals: −20 to +80 °C
• Recommended viscosity: 20–60 mm²/s
• Permitted viscosity range: 10–800 mm²/s
• Hydraulic-fluid cleanliness: ISO 4406 Class 20/18/15 maximum
• Speed: Not applicable
• Displacement: Not applicable
• Electrical actuation: The standard DA6VP2-4X/200-10M is not a standalone solenoid directional valve
• Solenoid unloading: Available on specific DA6VP2A/VP2B configurations with an attached directional spool valve

Key Technical Advantages

1. Pilot-Operated Main Stage

The DA6VP2 combines a pilot control stage with a main hydraulic stage. This architecture allows system pressure to control a higher-flow main switching function without relying solely on direct mechanical actuation.

2. Adjustable Switching Differential

The upper and lower switching points can be configured with a differential between 10% and 50% of nominal pressure. This allows the valve to be matched to accumulator capacity, pump flow, line resistance and operating pressure requirements.

3. Efficient Pump Unloading

Once the upper switching pressure is reached, the DA 6 VP can switch the pump toward low-pressure circulation instead of continuously maintaining high-pressure flow against a relief function. This is particularly beneficial in accumulator-supported hydraulic systems.

4. Standard NG6 Integration

The Size 6 construction is suitable for standardized subplate and manifold integration, making the valve practical for industrial hydraulic power units and retrofit projects.

5. 350-Bar Maximum Operating Pressure

The DA 6 V documentation specifies a maximum operating pressure of 350 bar, with a maximum flow of 40 L/min. The actual operating point must remain within the selected pressure stage and system design limits.

6. Proven Replacement-Supply Configuration

The exact DA6VP2-4X/200-10M / R900052037 combination is identifiable in Bosch Rexroth material listings, providing a clear reference for aftermarket replacement and maintenance purchasing.

Application Areas

Typical applications include:

• Hydraulic accumulator charging circuits
• Hydraulic power units
• Industrial hydraulic presses
• Clamping systems
• Metal-forming machinery
• Molding and forming equipment
• Hydraulic test systems
• Automated industrial hydraulic circuits
• High-pressure hydraulic power packs
• Pump unloading systems

The valve is especially useful where a hydraulic pump must alternate between system charging and low-pressure circulation according to accumulator or system pressure.

Expert Maintenance Tips

Verify Porting Before Installation

Confirm the P, B, T and Y connections before commissioning. Pilot and drain connections are essential to proper switching performance, and unnecessary back pressure in the control circuit should be avoided.

Keep the Accumulator Line Short

Bosch Rexroth recommends keeping the connection between the DA valve and hydraulic accumulator as short as practical and minimizing hydraulic resistance. Excessive line losses can influence real switching behavior.

Respect the 200-Bar Pressure Stage

For the /200 configuration, the documented adjustment range is 100–200 bar. The separate 350-bar figure represents maximum operating pressure and should not be interpreted as the normal adjustment range of the /200 pressure stage.

Maintain Hydraulic Cleanliness

Keep the hydraulic fluid within the specified ISO 4406 Class 20/18/15 cleanliness limit. Contamination can affect pilot passages, switching stability and long-term service reliability.

Record Original Switching Settings

During replacement, record the existing upper and lower switching pressures, accumulator pre-charge condition and original adjustment position. Reproducing only the nominal “200 bar” rating is not sufficient for accurate system commissioning.

Distinguish Standard and Solenoid-Unloading Versions

Do not assume that every DA6VP2 configuration includes electrical unloading. Specific DA6VP2A/DA6VP2B versions are available with a built-on directional spool valve for solenoid-operated unloading, whereas the standard DA6VP2-4X/200-10M should be identified according to its complete ordering code.

Engineering Replacement Assurance

For an aftermarket replacement, we recommend verifying the complete Rexroth code, material number R900052037, mounting interface, pressure stage and hydraulic porting before production. A properly engineered replacement can then be validated under 100% simulated operating-condition testing, including pressure switching, leakage and functional stability.