Product Overview
The Rexroth Z2FS 16-31/S (Material No. R971L20010) is a high-performance twin throttle check valve designed for precise flow control in industrial hydraulic systems. As a member of the Rexroth Z2FS series, this valve is a sandwich plate (modular) component that provides dual-line flow regulation for meter-in or meter-out control of actuators. It features two independently adjustable throttle cartridges, each equipped with a check valve that permits free flow in the opposite direction. The Z2FS 16-31/S is engineered for size NG16 (nominal diameter 16 mm) modular mounting, making it an ideal choice for integration into standardized hydraulic manifolds and valve stacks. Its robust construction and precision metering characteristics ensure reliable speed control of cylinders and motors in demanding industrial environments.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Twin Throttle Check Valve (Flow Control & Modular Valve) |
| Model Designation | Z2FS 16-31/S / R971L20010 |
| Nominal Size | NG16 (16 mm) |
| Operating Pressure | Up to 315 bar (standard industrial grade) |
| Flow Rate | Up to 250 L/min (dependent on throttle setting) |
| Mounting & Connection | Sandwich plate design, ISO 4401 / DIN 24340 NG16 interface |
| Adjustment Type | Manual spindle adjustment with lock nut (S = with lock nut) |
| Seal Material | NBR (standard); optional FKM available |
Engineering Features & Advantages
- Precision Performance: Dual independent throttle cartridges enable exact meter-in or meter-out flow control for two actuator lines, ensuring smooth and repeatable speed regulation.
- Integrated Check Function: Each throttle is paired with a check valve that allows unrestricted reverse flow, preventing unintended pressure build-up and enabling rapid return strokes.
- Modular Sandwich Design: The NG16 sandwich plate construction allows direct mounting between a directional valve and a subplate, simplifying system integration and reducing piping complexity.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with a robust housing and hardened internal components for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth Z2FS series valves, ensuring drop-in replacement without modification.
- Fine Adjustment: The “S” designation indicates a spindle with lock nut, providing secure setting retention even under vibration and dynamic loads.
Typical Industrial Applications
The Rexroth Z2FS 16-31/S twin throttle check valve is widely used in heavy industrial hydraulic systems where precise actuator speed control is critical. Typical applications include plastic injection molding machines, metallurgical presses, CNC machine tools, and
PRODUCT IMAGES
REXROTH Z2FS 16-31/S / R971L20010 Twin Throttle 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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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine REXROTH Z2FS 16-31/S / R971L20010 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.