Product Overview
The Rexroth Z2S6B1-66/S040 (Material No. R900392949) 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. Part of the Rexroth Z2S series modular valve family, this unit is engineered for sandwich plate mounting (ISO 4401 / DIN 24340 size 6) and is typically installed between a directional control valve and its subplate. When pilot pressure is applied to the release port, the poppet is hydraulically unseated, allowing reverse flow; in the absence of pilot pressure, the valve positively seals the actuator line, preventing load drift or creep. The “B1” designation indicates a specific spring and cracking pressure configuration, while “S040” denotes a defined pilot ratio and adjustment variant, making this valve a precise, application-matched solution for demanding industrial hydraulic circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Check Valve (Modular / Sandwich Plate Design) |
| Model Designation | Z2S6B1-66/S040 |
| Material Number | R900392949 |
| Nominal Size | NG6 (Size 6) |
| Operating Pressure | Up to 315 bar (working pressure, port A/B) |
| Pilot Pressure Ratio | Defined by “S040” variant (application-specific pilot ratio) |
| Cracking Pressure | “B1” spring configuration (standard industrial grade) |
| Mounting & Connection | ISO 4401-03 / DIN 24340-A6 sandwich plate interface |
| Sealing Material | NBR (standard); FKM available on request |
| Fluid Compatibility | Mineral oil based hydraulic fluids (HL, HLP) per DIN 51524 |
Engineering Features & Advantages
- Precision Performance: The pilot operated poppet design delivers zero-leak sealing in the blocked direction, ensuring accurate load holding and preventing actuator drift in vertical or clamping applications.
- Controlled Pilot Release: The “S040” pilot ratio enables reliable opening of the check valve at low pilot pressures, optimizing system efficiency and reducing required pilot circuit pressure.
- 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
The “B1” designation indicates a specific spring and cracking pressure configuration, while “S040” denotes a defined pilot ratio and adjustment variant, making this valve a precise, application-matched solution for demanding industrial hydraulic circuits.
PRODUCT IMAGES
REXROTH Z2S6B1-66/S040 / R900392949 Pilot Operated Check Valve
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Shop the genuine REXROTH Z2S6B1-66/S040 / R900392949 Pilot Operated Check Valve. This Germany-made hydraulic component features a leak-free poppet design, delivering reliable fluid control for heavy-duty industrial systems.