Product Overview
The Rexroth ZDZ60A2-4X/210Y (Material No. R900579606) is a pilot-operated pressure sequence valve designed for precise, load-dependent control of secondary hydraulic circuits in industrial power units. As a member of the Rexroth ZDZ series, this valve operates on a balanced spool principle, allowing a connected downstream function to be actuated only after the primary system pressure reaches the adjustable set point. The 4X designation indicates the current Rexroth component series with proven, field-tested internal geometry, while the 210Y pressure rating reflects a nominal adjustment range up to 210 bar. This valve is engineered for panel or manifold mounting and serves as a reliable sequencing, unloading, or pressure-holding element in demanding hydraulic systems.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve — Pressure Control Valve (Pressure Sequence Valve) |
| Model Designation | ZDZ60A2-4X/210Y |
| Material / Part Number | R900579606 |
| Operating Pressure | Adjustable up to 210 bar (nominal pressure range per model code) |
| Control Principle | Pilot-operated, balanced spool with adjustable spring pre-load |
| Mounting & Connection | Subplate / manifold mounting per ISO 5781 interface |
| Adjustment Type | Mechanical set screw with locknut (optional pressure adjustment variants available) |
| Hydraulic Fluid | Mineral oil based hydraulic fluids (HL, HLP) per DIN 51524 |
Engineering Features & Advantages
- Precision Performance: The pilot-operated balanced spool design delivers accurate, repeatable pressure sequencing with minimal hysteresis, ensuring downstream actuators engage only at the exact set pressure.
- Adjustable Pressure Setting: The 210Y pressure range allows fine-tuning of the sequencing threshold to match specific circuit requirements, with a locknut to secure the set point against vibration.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with hardened spool and sleeve components that resist wear and contamination-induced sticking.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth OEM standards, including the R900579606 material number, ensuring drop-in interchangeability.
- Versatile Circuit Function: Suitable for sequencing, unloading, and pressure-holding duties, enabling compact and efficient multi-actuator hydraulic system design.
Typical Industrial Applications
This pressure sequence valve is widely deployed in plastic injection molding machines for clamp and injection sequencing, metallurgical presses for multi-stage pressing cycles, construction and marine hydraulic systems for priority and secondary circuit control, and CNC machine tools where controlled pressure staging is required for tool clamping or workholding. It is also found in general industrial power units
PRODUCT IMAGES
REXROTH ZDZ60A2-4X/210Y / R900579606 Pressure Sequence Valve
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine REXROTH ZDZ60A2-4X/210Y / R900579606 Pilot Operated Pressure Relief Valve. This Germany-made hydraulic component features a precise pressure control design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.