Product Overview
The Rexroth S 20 A05-10/450J3 (Material No. R901424190) is a direct-operated hydraulic check valve from the proven Rexroth S-series modular valve family. Engineered as a sandwich-style flow control component, it permits free flow in one direction while blocking reverse flow with a spring-loaded poppet or ball seat design, delivering zero-leak shut-off and dependable load holding. With a nominal size of NG20 (SAE 3/4″) and a rated pressure of 450 bar, this valve is designed for integration into modular manifold stacks or as a standalone inline check element within high-pressure industrial hydraulic circuits. Its robust housing and precision-machined sealing faces ensure minimal pressure drop in the free-flow direction and rapid, chatter-free closure, making it a critical safeguard against reverse flow, load dropping, and pressure surges in demanding power units.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Check Valve (Flow Control & Modular Valve) |
| Model Designation | S 20 A05-10/450J3 |
| Material Number | R901424190 |
| Nominal Size | NG20 (SAE 3/4″) |
| Operating Pressure | Up to 450 bar (rated) |
| Cracking Pressure | Approx. 0.5 bar (standard spring configuration) |
| Mounting & Connection | Sandwich / Modular plate interface per ISO 4401 / DIN 24340 |
| Sealing Material | NBR (FKM available on request) |
| Fluid Compatibility | Mineral oil based hydraulic fluids (HL, HLP, HLP-D) |
| Operating Temperature Range | -20 °C to +80 °C (standard NBR seals) |
Engineering Features & Advantages
- Zero-Leak Reverse Shut-Off: Precision-lapped poppet and seat geometry delivers metal-to-metal sealing with virtually no internal leakage, ensuring reliable load holding and protection against reverse flow in high-pressure circuits.
- Low Pressure Drop in Free Flow: Optimized flow passages and large nominal size (NG20) minimize pressure loss during forward flow, improving overall system efficiency and reducing heat generation.
- Modular Sandwich Design: Compact plate-mount construction allows direct stacking into existing Rexroth modular valve assemblies, simplifying system integration and reducing piping requirements.
- 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: Exact dimensional and functional compatibility with original Rexroth OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
Typical Industrial Applications
With a nominal size of NG20 (SAE 3/4″) and a rated pressure of 450 bar, this valve is designed for integration into modular manifold stacks or as a standalone inline check element within high-pressure industrial hydraulic circuits.
PRODUCT IMAGES
Rexroth S 20 A05-10/450J3 / R901424190 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.
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
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