Product Overview
The Rexroth Z2S 6-1-66/ (Material Number R900347495) is a pilot operated check valve designed for leak-free load holding and reliable blocking of flow in one direction, while permitting free flow in the opposite direction. As a member of the Rexroth Z2S series of sandwich plate (modular) valves, this unit is engineered for direct mounting between a directional control valve and a subplate in accordance with ISO 4401 / DIN 24340 form A, size NG6 (CETOP 3). The valve operates on a proven poppet-and-spring principle: in the blocked direction, a spring-loaded poppet seals against the seat to prevent reverse flow; when pilot pressure is applied to the pilot port, the poppet is lifted off its seat, opening the passage and allowing return flow. This design makes the Z2S 6-1-66/ an essential component for load-holding circuits, preventing actuator drift and uncontrolled descent in the event of pressure loss or directional valve neutral positioning.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Check Valve (Sandwich Plate / Modular Design) |
| Model Designation | Z2S 6-1-66/ |
| Material Number | R900347495 |
| Nominal Size | NG6 (CETOP 3 / ISO 4401 size 6) |
| Operating Pressure | Up to 315 bar (working pressure, standard industrial grade) |
| Cracking / Pilot Pressure Ratio | Pilot ratio 1:1 (pilot pressure acts on poppet area to open against load) |
| Mounting & Connection | Sandwich plate mounting per ISO 4401 / DIN 24340 form A, NG6 interface |
| Sealing | NBR (Buna-N) seals, suitable for mineral oil based hydraulic fluids |
| Fluid Temperature Range | -20 °C to +80 °C (standard NBR seal configuration) |
Engineering Features & Advantages
- Leak-Free Load Holding: The spring-loaded poppet seat design provides zero-leak blocking in the closed direction, ensuring actuators remain locked in position and preventing drift or creep under sustained load.
- Pilot-Controlled Release: Pilot pressure applied at the designated pilot port reliably lifts the poppet off its seat, enabling controlled and repeatable opening for return flow with minimal pressure loss.
- 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
This pilot operated check valve (sandwich plate / modular design) is widely used in industrial hydraulic power units, machine tools, presses, and general automation systems where reliable, precise performance is required.
PRODUCT IMAGES
REXROTH Z2S 6-1-66/ / R900347495 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.
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine REXROTH Z2S 6-1-66/ / R900347495 Pilot Operated Check Valve. This Germany-made hydraulic component features a leak-free poppet design, delivering reliable fluid control for heavy-duty industrial systems.