Product Overview
The Parker R4V03-5351011G0QA525 (also referenced as 026-99113-H) is a pilot operated pressure relief valve from Parker’s R4V series of hydraulic pressure control valves. It functions as a normally closed, pilot-stage-controlled safety and limiting valve that protects hydraulic circuits from overpressure by diverting excess flow back to tank once the adjustable set pressure is reached. The pilot stage provides precise, stable cracking behavior with minimal pressure override, while the balanced main spool handles high flow rates with low pressure drop. This valve is engineered for continuous-duty industrial hydraulic power units, offering reliable system protection, accurate pressure regulation, and smooth, chatter-free operation across demanding operating cycles.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve – Pilot Operated Pressure Relief Valve (Pressure Control Valve) |
| Model Designation | R4V03-5351011G0QA525 / 026-99113-H |
| Manufacturer | Parker Hannifin |
| Series / Size | R4V Series, Size 03 (NG6 / CETOP 3 interface) |
| Operating Pressure | Standard Industrial Grade (up to rated 315 bar, pressure range per model code) |
| Adjustment Type | Adjustable pressure setting via protected adjustment screw / knob |
| Mounting & Connection | Standard ISO 4401 / CETOP 3 subplate mounting interface |
| Seal Material | NBR (Buna-N) standard; FKM available on request |
| Fluid Compatibility | Mineral-based hydraulic oils, HLP/HM grades per DIN 51524 |
Engineering Features & Advantages
- Precision Performance: Two-stage pilot operated design delivers accurate, repeatable pressure setting with low pressure override and stable, chatter-free relief across the full flow range.
- Balanced Main Spool: Minimizes the influence of back pressure and flow forces, ensuring consistent cracking and reseating behavior for reliable circuit protection.
- 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 CETOP 3 / ISO 4401 mounting pattern for drop-in installation.
- Adjustable & Lockable Setting: Field-adjustable pressure range with locking feature to prevent drift from vibration or unauthorized tampering.
Typical Industrial Applications
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PRODUCT IMAGES
PARKER R4V03-5351011G0QA525 / 026-99113-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 R4V03-5351011G0QA525 / 026-99113-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.
