Product Overview
The Parker R4V03-5333009G0QA125 (also referenced as 026-36139-H) is a pilot operated pressure relief valve from Parker’s R4V series of hydraulic pressure control valves. It is engineered to protect hydraulic circuits from overpressure by diverting excess flow back to tank once the adjustable set pressure is reached, thereby safeguarding pumps, actuators, and downstream components. The pilot operated design combines a balanced main poppet with a smaller pilot stage, delivering accurate pressure control, low pressure override, and stable operation across a wide flow range. This valve is a direct fit for industrial power units, manifolds, and OEM hydraulic systems requiring dependable pressure limiting and system unloading.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Pressure Relief Valve (Pressure Control Valve) |
| Model Designation | R4V03-5333009G0QA125 / 026-36139-H |
| Manufacturer | Parker Hannifin |
| Series / Size | R4V Series, NG06 (CETOP 3 / NFPA D03) subplate mounting |
| Operating Pressure | Standard Industrial Grade (up to 315 bar rated) |
| Pressure Adjustment | Adjustable via screw / knob with locknut, spring range per model code |
| Mounting & Connection | Subplate mounting to ISO 4401 / CETOP 3 interface |
| Seal Material | NBR (Buna-N), compatible with mineral-based hydraulic fluids |
| Fluid Compatibility | Mineral oil and standard industrial hydraulic fluids |
Engineering Features & Advantages
- Precision Pressure Control: Pilot operated two-stage design provides accurate, repeatable pressure setting with minimal override and hysteresis, protecting sensitive downstream components.
- Stable Performance: Balanced main poppet minimizes the influence of back pressure and flow forces, ensuring consistent relief behavior across the full operating range.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with hardened internal components and a robust housing for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, including the ISO 4401 / CETOP 3 subplate interface for drop-in installation.
- Adjustable Setpoint: Field-adjustable pressure setting with locknut to secure the desired relief pressure, simplifying commissioning and maintenance.
Typical Industrial Applications
This pilot operated pressure relief valve is widely used in hydraulic power units and manifold systems
PRODUCT IMAGES
PARKER R4V03-5333009G0QA125 / 026-36139-H Pilot Operated Pressure Relief 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 R4V03-5333009G0QA125 / 026-36139-H Pilot Operated Pressure Relief Valve. This Germany-made hydraulic component features a precise pressure control design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.
