REXROTH DBW20B2-52/315-6EW230N9K4 R900911748

Rexroth DBW 20 Series Hydraulic Pressure Relief Valve Description This is a pilot-operated pressure relief valve, model DBW 20 B2-52/315-6EW230N9K4 from Bosch Rexroth. It is designed to limit pressure in hydraulic systems, thereby protecting components from overpressure. This valve features an integrated solenoid for electrical unloading of the pressure circuit. It is built for subplate mounting according to ISO 6264 standards, ensuring interchangeability and ease of installation. Specifications Manufacturer: Rexroth Type: DBW 20 B2-52/315-6EW230N9K4 Part Number (MNR): R900911748 Valve Type: Pilot-operated pressure relief valve Size: 20 (NG20) Maximum Pressure Setting: 315 bar Solenoid Voltage: 230V AC, 50/60 Hz Mounting Interface: ISO 6264-AR-08-2-A Label Info MNR: R900911748 FD: 21010 Serial: 000123559458 Application This valve is widely used in general industrial machinery, presses, injection molding machines, and any hydraulic system requiring reliable pressure limitation and the ability for electrical unloading or pressure switching. Country of Origin Made in Germany. CO2 Impact Opting for this component saves approximately 37 kg of CO2 compared to manufacturing a new one. This choice supports sustainable industrial practices by reducing waste and energy consumption. Availability This item is in stock and ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ What is the function of the 230V AC solenoid on this DBW 20 valve?The solenoid allows for electrical unloading of the pressure circuit. When energized, it connects the pilot stage to the tank, causing the main valve to open and relieve system pressure to a minimum value, which is useful for starting pumps under no load or for safety functions. What is the recommended hydraulic fluid and cleanliness class for this valve?Bosch Rexroth generally recommends mineral oil-based hydraulic fluids (HL, HLP) according to DIN 51524. For optimal performance and longevity, a fluid cleanliness of at least ISO 4406 class 20/18/15 is recommended. Can the pressure setting of 315 bar be adjusted, and if so, how?Yes, the pressure setting is adjustable up to the maximum of 315 bar. Adjustment is made via a screw, usually located under a protective cap. Turning the adjustment screw clockwise increases the pressure setting. Always consult the product datasheet and ensure the system is depressurized before making any adjustments. profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners. Last Update: Friday, March 13, 2026