Product Overview
The Rexroth ZDR 6 DA3-43/75YM (Material Number: R900421983) is a high-precision sandwich plate pressure reducing valve designed for direct-controlled pressure regulation in industrial hydraulic systems. Manufactured by Bosch Rexroth, this valve is part of the proven ZDR 6 series, which is engineered to reduce a higher primary system pressure to a constant, lower secondary pressure. The “DA3” designation indicates a direct-operated pressure reducing valve with a specific adjustment type, while the “75YM” suffix defines the pressure rating and adjustment configuration. This sandwich plate design allows for space-saving integration directly between a directional control valve and its subplate, eliminating the need for additional piping and minimizing leak points. The valve is ideal for sub-circuits requiring a stable, reduced pressure independent of the main system load, ensuring precise control in demanding industrial applications.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Sandwich Plate Pressure Reducing Valve |
| Model Designation | ZDR 6 DA3-43/75YM / R900421983 |
| Operating Pressure | Up to 315 bar (primary), adjustable secondary pressure up to 75 bar |
| Mounting & Connection | Sandwich plate design, ISO 4401-03 (CETOP 3) interface |
| Adjustment Type | Manual adjustment with locknut (DA3) |
| Flow Rate | Up to 60 L/min (nominal) |
| Pressure Setting Range | Up to 75 bar (secondary pressure) |
Engineering Features & Advantages
- Precision Pressure Regulation: Direct-operated spool design ensures accurate and stable reduction of primary pressure to a constant secondary pressure, independent of flow fluctuations and backpressure.
- Sandwich Plate Construction: Compact, space-saving design allows direct mounting between directional control valves and subplates, reducing piping complexity and potential leakage points.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust materials and precise machining for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth OEM standards, ensuring drop-in replacement without modification.
- Versatile Adjustment: Manual adjustment with locknut provides secure pressure setting retention even under vibration.
Typical Industrial Applications
This pressure reducing valve is commonly used in plastic injection molding machines, metallurgical presses, CNC machine tools, and general industrial hydraulic systems where precise sub-circuit pressure control is required. It is particularly suited for clamping circuits, pilot pressure systems, and any application demanding a stable reduced pressure from a higher main system pressure.
PRODUCT IMAGES
Rexroth ZDR 6 DA3-43/75YM / R900421983 Sandwich Plate Pressure Reducing Valve
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Shop the genuine REXROTH ZDR 6 DA3-43/75YM / R900421983 Pressure Reducing Valve. This Germany-made hydraulic component features a direct-operated, poppet-type design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.