Rexroth DB 20-2-52/100 Pilot-Operated Pressure Relief Valve

Description

This is a Rexroth DB 20 series pilot-operated pressure relief valve, designed to limit pressure in a hydraulic circuit. It ensures system safety by reliably diverting excess flow to the tank when the preset pressure level is reached. This model is engineered for subplate mounting, making it ideal for integration into standard hydraulic systems.

Specifications

• Manufacturer: Rexroth
• Model: DB 20-2-52/100
• Material Number (MNR): R900589433
• Type: Pilot-operated pressure relief valve
• Size: NG20
• Mounting Interface: ISO 6264-AR-08-2-A
• Pressure Adjustment Range: up to 100 bar
• Maximum Operating Pressure: 315 bar
• Maximum Flow Rate: 400 l/min

Label Info

• MNR: R900589433
• Type: DB 20-2-52/100
• FD: 10511

Application

Used in a wide range of industrial hydraulic applications, including machine tools, presses, plastic injection molding machines, and general manufacturing equipment to protect the system from pressure spikes.

Country of Origin

Made in Germany.

CO2 Impact

Reusing this industrial component prevents the emission of approximately 12 kg of CO2 compared to manufacturing a new one. This is a significant saving, contributing to a more sustainable industrial practice.

Availability

This item is a tested, used product in excellent working condition. Order now from PLC2Day for expert support and fast delivery.

FAQ

Question?
How do I adjust the pressure setting on this DB 20-2-52/100 valve?

The pressure is adjusted by turning the adjustment element, which is under the protective cap. Loosen the lock nut and turn the element clockwise to increase pressure and counter-clockwise to decrease it. Always use a pressure gauge to verify the setting.

Question?
What is the significance of the "-2-" in the model number?

The "-2-" designation indicates that this is a valve for subplate mounting, with the porting pattern according to ISO 6264. This ensures it can be mounted on standard hydraulic manifolds and subplates of the corresponding size (NG20).

Question?
Can this valve be used with different hydraulic fluids?

This valve is typically designed for use with mineral oil (HL, HLP) based fluids according to DIN 51524. For use with other fluids, such as synthetic esters or water glycols, you must verify the seal compatibility (typically NBR or FKM) and consult the official Rexroth datasheet for material compatibility.

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Last Update: March 13, 2026