R928006978 Rexroth PWR3 Hydraulic Filter Element

Product Overview

The R928006978 (Engineering Code: 2.0630 PWR3-B00-0-M) Hydraulic Oil Filter Element is an engineering-grade, high-efficiency filtration solution designed as a direct 100% interchangeable replacement for Bosch Rexroth 2.0630 size filter elements. Engineered in compliance with international ISO fluid power standards, this filter utilizes premium multi-layer inorganic glass fiber media (Pure Power / PWR 3-micron technology) supported by robust galvanized steel wire mesh and heavy-duty end caps, complete with an integrated 3-bar bypass valve. Every element undergoes 100% simulated operating condition testing and differential pressure verification to maintain absolute fluid cleanliness (ISO 4406 standard) under high pressure surges and severe fluid viscosity changes, protecting axial piston pumps, hydraulic motors, and sensitive servo/proportional valves.

Technical Specifications

• Model Code: R928006978 (Designation: 2.0630 PWR3-B00-0-M; Cross-compatible series: R928006755, R928006701, 2.0630 PWR6, PWR10, PWR20)

• Filtration Rating: 3 µm absolute ($\beta_x(c) \ge 200$)

• Filter Material: PWR (Multi-layer inorganic micro-glass fiber, Pure Power technology)

• Collapse Pressure Rating: 30 bar (3.0 MPa / 435 psi)

• Bypass Valve Cracking Pressure: 3 bar (0.3 MPa / 43.5 psi, ‘B00’ designation)

• Operating Temperature Range: -30°C to +100°C (-22°F to +212°F)

• Sealing Material: NBR (Nitrile Rubber standard, ‘M’ suffix; FKM/Viton optional)

• Flow Direction: Out-to-In

• Net Weight: Approx. 2.85 kg

Key Technical Advantages

• Rexroth PWR 3µm Pleat Geometry: Multi-layered inorganic micro-glass fiber media offers high porosity and maximum effective surface area, delivering over 30% greater dirt-holding capacity and extending maintenance intervals.

• Exceptional Collapse Resistance: Reinforced with heavy-duty galvanized wire mesh and an inner perforated core, preventing pleat collapse and fiber fatigue under high differential pressure surges or cold fluid startups.

• Minimal Initial Delta-P ($\Delta p$): Precision-spaced pleats reduce internal fluid resistance, minimizing system power losses and protecting upstream hydraulic pumps against cavitation risks caused by backpressure.

• 100% Drop-In Rexroth Interchangeability: Manufactured strictly to OEM envelope dimensions and machining tolerances, allowing seamless direct replacement in original filter housings without modifications.

Application Areas

• Metallurgy & Steel Mills: Continuous casting hydraulic systems, AGC roll positioning, and heavy lubrication units.

• Plastics & Injection Molding: High-tonnage injection molding machinery and servo-hydraulic power units.

• Heavy Mining & Construction Equipment: Hydraulic excavators, mobile crushers, and rotary drilling rigs.

• Industrial Machine Tools: CNC hydraulic power packs and modular hydraulic power units (HPU).

Expert Maintenance Tips

• Differential Pressure Monitoring: Always equip the housing with a differential indicator. Replace the R928006978 element when the differential pressure reaches 2.5 bar, and ensure element servicing before reaching 2.8 bar to prevent bypassing unconditioned oil into the loop.

• Proper Installation Protocol: Thoroughly clean the interior housing cavity before installing the new element. Always pre-lubricate the target O-ring seal with clean system hydraulic fluid to prevent twisting or mechanical damage during insertion.

• Fluid Contamination Sampling: Take hydraulic oil samples for particle counting (ISO 4406) during filter replacement intervals to proactively monitor mechanical wear on upstream pumps and motors.