Product Overview
The Rexroth S 6 A1.0 (Material Number R900422881) is a direct-operated hydraulic check valve designed for leak-free load holding and precise flow direction control in industrial hydraulic circuits. As a member of the Rexroth S 6 series, this valve permits free flow in one direction while blocking reverse flow with minimal pressure drop, protecting pumps, actuators, and downstream components from backflow surges. The “A1.0” designation indicates a nominal flow capacity of 1.0 L/min with a standard cracking pressure, making it ideal for pilot lines, control circuits, and compact manifold assemblies where reliable one-way flow control is critical. Its robust poppet-and-spring design ensures fast closing response, zero leakage in the blocked direction, and long service life under continuous industrial duty.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Check Valve (Flow Control & Modular Valve) |
| Model Designation | S 6 A1.0 / R900422881 |
| Operating Pressure | Standard Industrial Grade (Up to 315 bar rated) |
| Nominal Flow Rate | 1.0 L/min (A1.0 designation) |
| Mounting & Connection | Standard ISO / Manufacturer Interface (subplate or manifold mounting) |
| Sealing Principle | Poppet-type seat, zero leakage in blocked direction |
| Cracking Pressure | Standard spring rating (low-pressure opening) |
Engineering Features & Advantages
- Precision Performance: Poppet-and-seat design delivers bubble-tight shut-off in the reverse direction, preventing load drift and protecting sensitive hydraulic components from pressure spikes.
- Low Pressure Drop: Optimized flow passages minimize resistance in the free-flow direction, reducing energy loss and heat generation in the circuit.
- Fast Response: Lightweight poppet and calibrated spring ensure rapid closing, ideal for dynamic load-holding and pilot-operated circuit applications.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with hardened sealing surfaces for extended service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth OEM standards, ensuring drop-in installation without modification.
Typical Industrial Applications
This Rexroth check valve is widely deployed in plastic injection molding machines for mold clamping and injection pressure holding, metallurgical presses for load retention and backflow prevention, construction and marine hydraulic systems for actuator locking, and CNC machine tools for precise pilot line control. Its compact S 6 series footprint also makes it suitable for modular manifold assemblies in general industrial power units and test stands.
PRODUCT IMAGES
Rexroth S 6 A1.0 / R900422881 Hydraulic 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 S 6 A1.0 / R900422881 Solenoid Directional Spool Valve. This Germany-made hydraulic component features a reliable spool design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.