Product Overview
The Rexroth Z2S 22A1-51 (Material Number R900433032) is a pilot-operated check valve designed for leak-free load holding and controlled load lowering in hydraulic systems. As part of the Rexroth Z2S series, this valve is a modular sandwich plate component that mounts between a directional control valve and a subplate, providing reliable blocking of flow in one direction while allowing free flow in the opposite direction. The pilot-operated design enables the valve to be opened hydraulically when system pressure is applied to the pilot port, making it ideal for applications requiring precise load control and prevention of unintended actuator movement due to external forces or gravity. This valve is engineered for high-pressure industrial hydraulic systems and is fully compatible with standard ISO 4401 mounting interfaces.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve – Pilot Operated Check Valve (Modular/Sandwich Plate) |
| Model Designation | Z2S 22A1-51 / R900433032 |
| Operating Pressure | Up to 315 bar (standard industrial grade) |
| Nominal Flow Rate | Up to 120 L/min (dependent on circuit configuration) |
| Cracking Pressure | Standard spring setting (typically 1.5 to 3 bar) |
| Pilot Ratio | Standard pilot ratio for reliable opening under load |
| Mounting & Connection | ISO 4401 / DIN 24340 standard sandwich plate interface |
| Sealing Material | NBR (Buna-N) standard; FKM available on request |
| Fluid Compatibility | Mineral oil based hydraulic fluids (HL, HLP, HLPD, HVLP) |
| Fluid Temperature Range | -20°C to +80°C (standard NBR seals) |
| Viscosity Range | 10 to 800 mm²/s (cSt) |
Engineering Features & Advantages
- Leak-Free Load Holding: The poppet-type seat design ensures zero leakage in the blocked direction, reliably preventing drift or creep of actuators under sustained load.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction and wear-resistant internal components for extended service life.
- Direct Fit Replacement: Precision-manufactured to original REXROTH specifications for direct replacement, minimising downtime and eliminating fitment issues.
Typical Industrial Applications
This valve is engineered for high-pressure industrial hydraulic systems and is fully compatible with standard ISO 4401 mounting interfaces.
PRODUCT IMAGES
REXROTH Z2S 22A1-51/ / R900433032 Pilot Operated Check 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 REXROTH Z2S 22A1-51/ / R900433032 Pilot Operated Check Valve. This Germany-made hydraulic component features a pilot-operated design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.