Product Overview
The Parker R4V03-5351009G0QA125 is a pilot operated pressure relief valve from the Parker R4V series, engineered to protect hydraulic circuits from excessive pressure and maintain precise system pressure regulation. The valve operates on a two-stage pilot principle: a small pilot poppet senses system pressure and opens at the set value, allowing flow to drain from the main spool chamber, which then shifts the balanced main spool to divert full pump flow to tank. This design delivers fast, stable response with minimal pressure override, making it ideal for continuous-duty industrial hydraulic power units and high-pressure machine circuits. The R4V03 size 03 (NG10 / CETOP 3) body is a direct-mount, subplate-style valve suitable for manifold or sandwich mounting configurations.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve — Pilot Operated Pressure Relief Valve (Pressure Control Valve) |
| Model Designation | R4V03-5351009G0QA125 |
| Series / Size | Parker R4V Series, Size 03 (NG10 / CETOP 3) |
| Operating Pressure | Standard Industrial Grade (Up to 350 bar rated) |
| Pressure Adjustment | Adjustable via protected hex set screw with locknut |
| Mounting & Connection | Subplate / Manifold Mounting, ISO 4401 / CETOP 3 Interface |
| Seal Material | NBR (Buna-N) — compatible with mineral-based hydraulic fluids |
Engineering Features & Advantages
- Precision Performance: Two-stage pilot operated design provides accurate cracking pressure, low pressure override, and stable regulation even under rapid flow changes.
- Industrial Reliability: Balanced main spool and hardened internal components are built for continuous operation under severe industrial conditions and high cyclic duty.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Parker R4V03 OEM standards, ensuring drop-in replacement without manifold modification.
- Fast Response: Pilot stage reacts quickly to pressure transients, minimizing system shock and protecting downstream components from pressure spikes.
Typical Industrial Applications
This pilot operated pressure relief valve is widely deployed in plastic injection molding machines, metallurgical presses, CNC machine tool hydraulic power units, and construction & marine hydraulic systems. It serves as the primary system safety and pressure-limiting valve in pump outlet lines, accumulator circuits, and multi-actuator manifolds where reliable overpressure protection and precise pressure control are essential.
PRODUCT IMAGES
PARKER R4V03-5351009G0QA125 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 R4V03-5351009G0QA125 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.
