Product Overview
The Rexroth Z1S 6 D05-40/V (R901086090) is a direct-operated, spring-loaded check valve designed for modular sandwich plate mounting within industrial hydraulic systems. As part of the Rexroth Z1S series, this valve functions as a reliable one-way flow control element, permitting free flow in one direction while positively blocking reverse flow to protect downstream components, maintain circuit integrity, and prevent load-induced backflow. The “D05” designation indicates a size 5 (NG6 / CETOP 3) modular interface, and the “40” series reflects the standard Rexroth modular valve generation. The “V” suffix denotes the FKM (fluorocarbon) seal variant, making the valve compatible with phosphate ester (HFD) hydraulic fluids and elevated operating temperatures. This check valve is engineered for seamless integration into vertical stacking assemblies, providing dependable leak-free isolation in demanding industrial circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Check Valve (Modular Sandwich Plate Design) |
| Model Designation | Z1S 6 D05-40/V / R901086090 |
| Nominal Size | NG6 (CETOP 3 / D05 modular interface) |
| Operating Pressure | Up to 315 bar (standard industrial grade) |
| Cracking Pressure | Approx. 1.5 bar (spring-loaded, standard configuration) |
| Seal Material | FKM (Viton) — “V” variant, suitable for HFD fluids |
| Mounting & Connection | Modular sandwich plate, ISO 4401 / CETOP 3 interface |
| Fluid Compatibility | Mineral oil (HLP), phosphate ester (HFD), and selected synthetic fluids |
Engineering Features & Advantages
- Precision One-Way Flow Control: Spring-loaded poppet/seating design ensures rapid, positive closure and reliable reverse-flow blocking, protecting pumps, actuators, and downstream valves from pressure surges and backflow.
- Modular Sandwich Construction: The NG6 / CETOP 3 modular interface allows direct vertical stacking with directional, pressure, and flow control valves, minimizing piping, reducing leak points, and simplifying system assembly.
- FKM (Viton) Sealing System: The “V” seal variant delivers superior chemical and thermal resistance, enabling reliable operation with aggressive hydraulic fluids such as phosphate esters (HFD) and in high-temperature environments.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with hardened internal components and precision-machined sealing surfaces for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth Z1S series standards, ensuring drop-in replacement without modification to existing manifold assemblies.
Typical Industrial Applications</h
PRODUCT IMAGES
REXROTH Z1S 6 D05-40/V / R901086090 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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- 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 Z1S 6 D05-40/V / R901086090 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.