The PARKER R4R03-59331B110 is a heavy-duty industrial pressure control valve engineered for precise regulation of hydraulic system pressure in demanding applications. This direct-operated, spring-loaded relief valve protects components from overpressure by diverting excess flow to tank when the set pressure is reached.
PARKER R4R03-59331B110 Technical Specifications
| Product Type | Pressure Control Valve |
| Series | R4R03 |
| Model | R4R03-59331B110 |
| Actuation | Direct-operated, spring-loaded |
| Mounting | Modular / Subplate |
| Maximum Operating Pressure | Up to 350 bar (5075 psi) |
| Adjustment | Manual, with locknut |
| Fluid Compatibility | Mineral oil, synthetic hydraulic fluids |
| Port Connections | ISO 4401 / CETOP standard |
Key Engineering Features
- Direct-acting design for fast response and low hysteresis
- Hardened, precision-ground spool and seat for long service life
- Adjustable pressure setting with tamper-resistant locknut
- Modular mounting interface for easy integration into existing manifolds
- High flow capacity with minimal pressure drop
Industrial Applications
- Hydraulic power units and central systems
- Presses, injection molding machines, and machine tools
- Mobile and industrial hydraulic circuits requiring overpressure protection
- Test stands and simulation equipment
For technical inquiries, dimensional drawings, or replacement support for PARKER R4R03-59331B110, contact the Pro-Hydraulic engineering team.
PRODUCT IMAGES




PARKER R4R03-59331B110 Pressure Control 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 PARKER R4R03-59331B110 Pressure Control Valve. This precision-engineered industrial component delivers reliable fluid control for heavy-duty systems.