Product Overview
The Rexroth Z2S 6-1-6X (Material No. R900347495) is a pilot operated check valve designed for leak-free load holding and controlled flow in hydraulic systems. As part of the Rexroth Z2S series, this modular valve is engineered to prevent reverse flow in a hydraulic circuit until a pilot pressure signal is applied to release the poppet from its seat. The valve features a robust poppet-type seating design that ensures zero internal leakage in the blocked direction, making it ideal for load-holding applications where drift must be eliminated. The Z2S 6-1-6X is a sandwich plate (modular) valve conforming to ISO 4401 / DIN 24340 size 6 (NG6) mounting patterns, allowing direct stacking between directional control valves and subplates without additional piping. The “6X” designation indicates the 60 series generation, reflecting Rexroth’s ongoing refinement of sealing technology, spring characteristics, and pilot ratio options. This valve is widely deployed in industrial hydraulic power units, press circuits, and clamping systems where reliable load retention and controlled decompression are critical to operational safety and process repeatability.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Check Valve (Modular / Sandwich Plate Design) |
| Model Designation | Z2S 6-1-6X / R900347495 |
| Nominal Size | NG6 (Size 6) per ISO 4401 / DIN 24340 |
| Operating Pressure | Up to 315 bar (working pressure, dependent on circuit configuration) |
| Cracking / Pilot Pressure | Pilot ratio per Z2S 6-1 series (standard pilot pressure release) |
| Flow Direction | Free flow in one direction; blocked in reverse until pilot pressure applied |
| Mounting & Connection | Sandwich plate mounting, ISO 4401 / DIN 24340 NG6 interface |
| Sealing | NBR (Buna-N) standard; FKM available for high-temperature service |
| Fluid Compatibility | Mineral oil based hydraulic fluids per DIN 51524 (HL, HLP); HFC/HFD on request |
| Fluid Temperature Range | -20 °C to +80 °C (NBR seals) |
Engineering Features & Advantages
- Precision Performance: The pilot operated check valve (modular / sandwich plate design) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Designed for dependable long-term operation in demanding industrial environments, with quality bearings and sealing systems ensuring extended maintenance intervals.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original REXROTH standards, allowing straightforward retrofit into existing hydraulic systems without rework.
- Rated Capability: Rated for pressure ratings up to 315 bar, supporting stable operation across the full working range.
Typical Industrial Applications
This valve is widely deployed in industrial hydraulic power units, press circuits, and clamping systems where reliable load retention and controlled decompression are critical to operational safety and process repeatability.
PRODUCT IMAGES
REXROTH Z2S 6-1-6X/ / R900347495 Pilot Operated Check Valve
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Shop the genuine REXROTH Z2S 6-1-6X/ / R900347495 Pilot Operated Check Valve. This Germany-made hydraulic component features a robust poppet design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.