Rexroth DR Pilot Operated Relief Valve

Rexroth DR Pilot Operated Relief Valve

The Rexroth DR Pilot Operated Relief Valve is a robust and reliable hydraulic component, engineered to maintain system pressure within a defined range. This valve excels in applications where consistent pressure regulation is critical, ensuring optimal performance and protection of hydraulic circuits.

Its pilot-operated design allows for precise control over pressure settings, making it an ideal choice for demanding industrial environments. The Rexroth DR valve is crafted with high-quality materials, guaranteeing durability and long service life, even under challenging conditions.

Rexroth DR Features

  • Pilot-Operated Design: The Rexroth DR valve is a pilot-operated pressure reducing valve, which ensures precise control and stability in reducing system pressure, particularly in high-demand hydraulic systems​.
  • Multiple Mounting Options: This valve is versatile in its installation, supporting subplate mounting with porting patterns according to DIN 24 340, ISO 5781, and CETOP-RP 121 H, as well as threaded and manifold mounting options​.
  • Wide Pressure Range: The valve is available in five pressure stages, with settable pressures up to 350 bar, making it suitable for a broad range of applications where different pressure levels are required​.
  • Adjustable Pressure Settings: The DR valve offers four different adjustment elements, including a rotary knob, a sleeve with hexagon and protective cap, a lockable rotary knob with a scale, and a rotary knob with a scale, providing flexibility and ease of adjustment​.
  • High Flow Capacity: The valve can handle a maximum flow of up to 400 L/min, depending on the size, ensuring efficient operation even in high-flow applications​.
  • Optional Check Valve: An optional check valve can be integrated, which allows free flow in the reverse direction (from A to B), enhancing the valve's functionality in systems requiring this feature.
  • Robust and Reliable Construction: Designed with a robust construction, the DR valve is built to withstand harsh operating conditions, including high operating pressures and varying fluid types, ensuring long-term reliability​.

Rexroth DR Specifications

SpecificationDetail
Valve TypeDR Pilot Operated Relief Valve
Nominal Sizes6, 10, 16, 20, 25, 32
Maximum Operating Pressure350 bar (5076 PSI)
Maximum Flow Rate60 L/min (DR6), 150-400 L/min (other sizes)
Pressure Stages5 stages: 50, 100, 150, 200, 315, 350 bar
Adjustment Elements4 types: Rotary knob, Sleeve with hexagon and protective cap, Lockable rotary knob with scale, Rotary knob with scale
Mounting OptionsSubplate mounting according to ISO 4401-03-02-0-05 (DR6), DIN 24 340 form D, ISO 5781, CETOP–RP 121 H
Operating Temperature Range-30°C to +80°C (-22°F to 176°F) for NBR seals; -20°C to +80°C (-4°F to 176°F) for FKM seals
Hydraulic FluidMineral oil (HL, HLP), Fast bio-degradable fluids, HETG, HEPG, HEES
Viscosity Range10 to 800 mm²/s
ISO Cleanliness CodeISO 4406 (C) class 20/18/15
Optional Check ValveAvailable for subplate mounting valves
Corrosion ProtectionOptional corrosion-protected design (240 h salt spray test according to EN ISO 9227)
Pilot Oil SupplyInternal pilot oil supply, external pilot oil drain
Installation PositionOptional
WeightDR6: 1.2 kg; DR10-DR32: 3.4-8.0 kg depending on size and mounting type

Rexroth DR Catalogue

ModelDR Pilot Operated Relief Valve PriceStock Status
DR10-4-5X/50YM$551-$890Limited Stock
DR10-4-5X/100YM$780-$918Limited Stock
DR10-5-5X/200YM$682-$700Limited Stock
DR10-5-5X/315YM$668-$734Limited Stock
DR10-4-5X/200Y$803-$942Limited Stock
DR10-4-5X/315Y$752-$968Limited Stock
DR10-5-5X/200Y$714-$967Limited Stock
DR10-5-5X/315Y$631-$979Limited Stock
DR20-4-5X/50YM$632-$890Limited Stock
DR20-4-5X/100YM$734-$1021Limited Stock
DR20-5-5X/50YM$687-$885Limited Stock
DR20-2-5X/100YM$918-$1019Limited Stock
DR20-4-5X/50Y$560-$781Limited Stock
DR20-4-5X/100Y$616-$855Limited Stock
DR20-5-5X/50Y$632-$659Limited Stock
DR20-2-5X/100Y$796-$802Limited Stock
DR6DP1-5X/25YM$587-$1009Limited Stock
DR6DP1-5X/75YM$554-$900Limited Stock
DR6DP2-5X/25YM$556-$748Limited Stock
DR6DP2-5X/75YM$710-$749Limited Stock
DR6DP1-5X/75Y$559-$944Limited Stock
DR6DP2-5X/25Y$669-$983Limited Stock
DR6DP2-5X/75Y$649-$812Limited Stock

For DR for sale and stock availability, please contact our business manager for pricing information.

DR Pilot Operated Relief Valve Manual PDF

The Rexroth DR Pilot Operated Relief Valve is a precision-engineered hydraulic component designed to maintain consistent pressure control in various industrial applications. This valve offers reliable pressure regulation by diverting excess fluid when system pressure exceeds a predefined limit, ensuring safety and efficiency in operation. With its robust construction and high-performance capabilities, the DR series is suitable for a wide range of hydraulic systems, providing optimal flow control and minimising the risk of pressure spikes. Ideal for applications demanding precise pressure management, the Rexroth DR valve is a dependable choice for maintaining system integrity.

Rexroth DR Valve Manual PDF Free Download

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Rexroth DR Pilot Operated Relief Valve Applications

  • Hydraulic Systems Pressure Regulation: The DR Pilot Operated Relief Valve is commonly used in hydraulic systems to maintain a consistent and safe pressure level by controlling the maximum system pressure, ensuring operational safety and system stability in various industrial applications.
  • Machine Tool Industry: In machine tool applications, the valve helps protect sensitive components from pressure spikes, ensuring smooth and precise operations by preventing excessive pressure buildup in hydraulic circuits.
  • Mobile Equipment: The valve is ideal for use in mobile machinery, such as construction and agricultural equipment, where it ensures stable hydraulic pressure during varying load conditions, enhancing the reliability and longevity of the equipment​.
  • Press Control Systems: The valve is suited for press control systems, where it provides precise pressure control and reliable operation, crucial for the consistent performance of hydraulic presses used in manufacturing processes.
  • Injection Molding Machines: In injection molding applications, the valve controls the hydraulic pressure to ensure uniformity and quality in the molding process, preventing defects caused by pressure fluctuations.
  • Energy Sector Equipment: The valve is applicable in energy sector equipment, including wind turbines and oil and gas extraction machinery, where it helps manage hydraulic pressure in challenging environments to prevent system failures.
  • Marine and Offshore Applications: The corrosion-resistant design of the valve makes it suitable for marine and offshore applications, where it ensures safe and reliable pressure control in harsh, saline environments.

Rexroth DR FAQ

The Rexroth DR valve can operate at a maximum pressure of 350 bar, depending on the specific configuration and application.

The DR valve offers four types of adjustment elements: rotary knob, sleeve with hexagon and protective cap, lockable rotary knob with scale, and rotary knob with scale​.

The valve is available in five pressure stages: 50, 100, 200, 315, and 350 bar​.

Yes, the DR valve is compatible with various hydraulic fluids, including mineral oils (HL, HLP), biodegradable fluids like HETG and HEES, and flame-resistant fluids such as HFDU.

The maximum flow rate for the DR valve varies by size, with the largest size handling up to 400 L/min​.

The DR valve uses NBR seals, suitable for temperatures from -30°C to +80°C, and FKM seals, suitable for temperatures from -20°C to +80°C​.

Yes, the Rexroth DR valve can be configured with an internal pilot oil supply and an external pilot oil drain​.

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