Product Overview
The Rexroth Z2S16-1-51 (Material No. R900328797) is a pilot operated check valve belonging to the Rexroth Z2S series of modular sandwich plate valves. Designed for leak-free load holding and reliable blocking of flow in one direction, this valve permits free flow in the forward direction and prevents reverse flow until a sufficient pilot pressure is applied to the pilot port. The Z2S16-1-51 is a size 16 (NG16 / CETOP 7) modular component, engineered to be sandwiched between a directional control valve and a subplate, making it an ideal solution for load holding, load locking, and pressure retention circuits in demanding industrial hydraulic systems. As a genuine Rexroth component, it delivers the precision metering, low leakage, and long service life expected from the original manufacturer.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Check Valve (Modular Sandwich Plate Valve) |
| Model Designation | Z2S16-1-51 / R900328797 |
| Nominal Size | NG16 (CETOP 7 / ISO 4401-07) |
| Operating Pressure | Up to 315 bar (working pressure, standard industrial grade) |
| Pilot Pressure Ratio | Standard pilot ratio (approx. 1:4.5 area ratio for reliable opening) |
| Mounting & Connection | Sandwich plate mounting per ISO 4401 / CETOP 7 interface |
| Sealing | NBR (Buna-N) seals, suitable for mineral oil based hydraulic fluids |
| Fluid Temperature Range | -20 °C to +80 °C (standard NBR configuration) |
Engineering Features & Advantages
- Precision Performance: The pilot operated poppet design ensures virtually leak-free blocking of reverse flow, providing secure load holding and preventing drift in actuator circuits even under sustained pressure.
- Modular Sandwich Construction: Designed as a size 16 modular valve, it integrates directly between a directional control valve and subplate, simplifying system design and reducing piping and potential leak points.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with hardened internal components and proven Rexroth quality for extended service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, ensuring drop-in replacement without modification to existing manifolds or circuits.
Typical Industrial Applications
The Rexroth Z2S16-1-51 pilot operated check valve is widely used in heavy industrial hydraulic systems requiring reliable load holding and pressure retention. Typical applications include plastic injection molding machines, metallurgical presses, construction and marine hydraulics, CNC machine tools, and general manifold-based hydraulic power units where secure blocking of actuator movement is critical.
PRODUCT IMAGES
REXROTH Z2S16-1-51/ / R900328797 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 Z2S16-1-51/ / R900328797 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.