Product Overview
The Rexroth Z2S 6 A2-46/2QV (Material No. R900439389) is a pilot operated check valve from the proven Z2S series, designed for leak-free load holding and controlled actuator locking in hydraulic systems. Configured in a sandwich (modular) plate design, this valve is mounted between a directional control valve and a subplate, allowing it to block flow in one direction while permitting free flow in the opposite direction until a pilot pressure signal unlocks the poppet. The “A2” designation indicates the pilot ratio and cracking configuration, while the “46” identifies the pressure rating series. With its robust poppet-and-spring design and precision-machined housing, the Z2S 6 A2-46/2QV delivers dependable sealing performance, minimal internal leakage, and long service life in demanding industrial circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve — Pilot Operated Check Valve (Modular / Sandwich Plate) |
| Model Designation | Z2S 6 A2-46/2QV |
| Material / Order Number | R900439389 |
| Nominal Size | NG6 (CETOP 3 / ISO 4401-03) |
| Operating Pressure | Up to 315 bar (working pressure, series 46) |
| Pilot Ratio | A2 configuration (pilot pressure release ratio per Rexroth Z2S standard) |
| Mounting & Connection | Sandwich plate, ISO 4401-03-02-0-05 interface, 4 x M5 mounting bolts |
| Sealing | NBR (Buna-N) seals, suitable for mineral oil based hydraulic fluids |
| Fluid Temperature Range | -20 °C to +80 °C (standard NBR) |
Engineering Features & Advantages
- Leak-Free Load Holding: The precision-ground poppet and seat geometry provide a tight, virtually leak-free seal in the blocked direction, preventing drift of cylinders and actuators under sustained load.
- Pilot-Controlled Release: The A2 pilot configuration allows controlled opening of the check valve via an external pilot pressure signal, enabling smooth, deliberate lowering or retraction of loaded actuators.
- Modular Sandwich Design: Compact NG6 sandwich construction integrates directly between directional valve and subplate, minimizing piping, reducing leak points, and simplifying system assembly.
- Industrial Reliability: Hardened internal components and a robust housing are engineered for continuous operation under severe industrial conditions, including high cycle rates and pressure spikes.
- 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
With its robust poppet-and-spring design and precision-machined housing, the Z2S 6 A2-46/2QV delivers dependable sealing performance, minimal internal leakage, and long service life in demanding industrial circuits.
PRODUCT IMAGES
Rexroth Z2S 6 A2-46/2QV / R900439389 Pilot Operated Check Valve
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Shop the genuine Rexroth Z2S 6 A2-46/2QV / R900439389 Check Valve. This Germany-made hydraulic component features a poppet-type design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.