Product Overview
The PARKER R4R06-59512P2G0R8110 is a pilot operated pressure reducing valve from Parker’s R4R series, engineered to maintain a constant reduced outlet pressure regardless of fluctuations in inlet pressure or changes in flow demand. Utilizing a balanced pilot-stage sensing element acting on a main spool, this valve delivers precise downstream pressure regulation for industrial hydraulic circuits where secondary circuit pressure must be held below main system pressure. The R4R06 frame size is designed for inline mounting within medium to high pressure hydraulic power units, offering stable pressure control, minimal hysteresis, and fast response to dynamic load changes. This valve is a direct fit replacement for OEM Parker R4R series installations and is suitable for continuous-duty industrial service.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Pressure Reducing Valve (Pressure Control Valve) |
| Model Designation | R4R06-59512P2G0R8110 |
| Series / Frame Size | Parker R4R Series, Size 06 (NG6 / CETOP 3 interface class) |
| Operating Pressure | Standard Industrial Grade (up to 350 bar inlet, reduced outlet per adjustment range) |
| Control Function | Pilot operated pressure reduction with balanced main spool |
| Adjustment | Manual pressure adjustment via set screw / adjustment knob |
| Mounting & Connection | Subplate / manifold mounting, standard ISO / Parker interface |
| Seal Material | NBR (Buna-N) standard, compatible with mineral-based hydraulic fluids |
| Fluid Compatibility | Mineral oil based hydraulic fluids (HL, HLP, HV per DIN 51524) |
Engineering Features & Advantages
- Precision Pressure Regulation: The pilot operated design senses downstream pressure through a dedicated pilot stage, allowing the main spool to modulate flow with high accuracy and minimal pressure override, keeping the reduced outlet pressure stable even as inlet pressure or load flow varies.
- Balanced Spool Design: The balanced main spool minimizes the influence of inlet pressure on the set reduced pressure, resulting in consistent regulation across the full working pressure range and reduced operator re-adjustment.
- Low Hysteresis & Fast Response: Optimized pilot orifice and spring characteristics deliver repeatable pressure settings and quick reaction to sudden changes in downstream flow demand, protecting sensitive secondary circuits.
- Industrial Reliability: Hardened, precision-ground spool and sleeve assembly built for continuous operation under severe industrial conditions, with proven Parker R4R series durability.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original PARKER standards, allowing straightforward retrofit into existing hydraulic systems without rework.
Typical Industrial Applications
This valve is a direct fit replacement for OEM Parker R4R series installations and is suitable for continuous-duty industrial service.
PRODUCT IMAGES

PARKER R4R06-59512P2G0R8110 Pilot Operated Pressure Reducing Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine PARKER R4R06-59512P2G0R8110 Solenoid Directional Control Valve. This US-made hydraulic component features a robust spool design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.





