Product Overview
The Rexroth Z2S6B1-66/SO40 (Material No. R900392949) is a pilot operated check valve from the proven Z2S series, designed for leak-free load holding and reliable blocking of flow in one direction while permitting free flow in the opposite direction. As a sandwich plate (modular) valve, it mounts directly between a directional control valve and a subplate in accordance with ISO 4401 / DIN 24340 (NG6 / CETOP 3 interface), enabling compact system integration without additional piping. The valve remains closed under spring and system pressure until a pilot signal is applied to the pilot port, at which point the poppet is hydraulically unseated to allow reverse flow. This design makes the Z2S6B1-66/SO40 ideal for load-holding circuits, cylinder locking, and prevention of load creep or drift in industrial hydraulic systems.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Check Valve (Modular / Sandwich Plate Design) |
| Model Designation | Z2S6B1-66/SO40 |
| Material Number | R900392949 |
| Size / Nominal Diameter | NG6 (CETOP 3 / ISO 4401-03) |
| Operating Pressure | Up to 315 bar (working pressure, depending on port configuration) |
| Cracking / Pilot Pressure Ratio | Pilot ratio per Z2S series (approx. 1:4.5 area ratio, model-dependent) |
| Mounting & Connection | Sandwich plate, ISO 4401-03 / DIN 24340-A6 port pattern |
| Sealing | NBR (Buna-N) seals, suitable for mineral oil based hydraulic fluids |
| Fluid Temperature Range | Approx. -20 °C to +80 °C (standard NBR) |
Engineering Features & Advantages
- Precision Performance: Spring-loaded poppet provides tight, leak-free sealing in the blocked direction, effectively preventing load creep, drift, and unintended actuator movement in holding circuits.
- Pilot Controlled Release: Hydraulic pilot pressure acting on the internal piston unseats the poppet, allowing controlled reverse flow only when the pilot signal is present, ensuring safe and sequenced operation.
- Modular Sandwich Construction: Compact NG6 sandwich design mounts directly between directional valve and subplate, minimizing installation space and eliminating external piping and potential leak points.
- 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 OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
Typical Industrial Applications
This design makes the Z2S6B1-66/SO40 ideal for load-holding circuits, cylinder locking, and prevention of load creep or drift in industrial hydraulic systems.
PRODUCT IMAGES
Rexroth Z2S6B1-66/SO40 / R900392949 Pilot Operated Check Valve
âš¡ 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 Z2S6B1-66/SO40 / R900392949 Check Valve. This Germany-made hydraulic component features a poppet-type design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.