Product Overview
The Rexroth Z2S 6-3-66 (Material Number R900347497) is a pilot-operated check valve designed for leak-free load holding and controlled flow in hydraulic systems. Part of the Rexroth Z2S series of sandwich plate check valves, this unit is built to block flow in one direction and permit free flow in the opposite direction until a pilot pressure signal unlocks the poppet. The Z2S 6-3-66 is engineered for direct sandwich mounting between a directional control valve and its subplate, providing a compact, modular solution for load holding, pilot-controlled lowering, and prevention of unintended actuator drift. With a nominal size of 6 (NG6 / CETOP 3 / ISO 4401-03 interface), it integrates seamlessly into standard industrial hydraulic manifolds and offers reliable, repeatable performance in demanding applications.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Check Valve (Sandwich / Modular Plate Design) |
| Model Designation | Z2S 6-3-66 / R900347497 |
| Nominal Size | NG6 (CETOP 3 / ISO 4401-03) |
| Operating Pressure | Up to 315 bar (working pressure, standard industrial grade) |
| Cracking / Pilot Pressure Ratio | Pilot ratio approximately 1:3 (pilot pressure to load pressure) |
| Mounting & Connection | Sandwich plate, ISO 4401-03-02-0-05 interface, 4 x M5 mounting bolts |
| Sealing Material | NBR (Buna-N) standard, compatible with mineral oil based hydraulic fluids |
| Fluid Temperature Range | -20 °C to +80 °C (standard NBR seals) |
| Viscosity Range | 10 to 800 mm²/s (cSt), optimal 16–36 mm²/s |
| Flow Direction | Free flow A→A2 / B→B2; blocked reverse until pilot actuated |
Engineering Features & Advantages
- Precision Performance: The pilot-operated poppet design ensures virtually leak-free blocking of flow in the closed direction, preventing load drift and holding actuators securely in position even under sustained pressure.
- 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
With a nominal size of 6 (NG6 / CETOP 3 / ISO 4401-03 interface), it integrates seamlessly into standard industrial hydraulic manifolds and offers reliable, repeatable performance in demanding applications.
PRODUCT IMAGES
REXROTH Z2S 6-3-66/ / R900347497 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 6-3-66/ / R900347497 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.