Product Overview
The Rexroth Z2FS16-8-31/S2 (Material No. R900457256) is a high-performance twin throttle check valve designed for precise flow control in industrial hydraulic systems. Manufactured by Bosch Rexroth, this modular valve is part of the Z2FS series, which is engineered to regulate the flow rate of hydraulic fluid in two directions independently. The valve features two throttle check valves in a single housing, allowing for precise adjustment of actuator speeds in both advance and return strokes. Its sandwich plate design enables direct mounting between a directional control valve and a subplate, making it an ideal component for compact, high-integrity hydraulic circuits. The Z2FS16-8-31/S2 is widely used in applications requiring accurate speed control, load holding, and smooth deceleration of hydraulic actuators.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Twin Throttle Check Valve (Flow Control & Modular Valve) |
| Model Designation | Z2FS16-8-31/S2 |
| Material Number | R900457256 |
| Operating Pressure | Up to 315 bar (standard industrial grade) |
| Nominal Flow Rate | Up to 160 L/min (dependent on throttle setting) |
| Mounting & Connection | Sandwich plate design, ISO 4401-05 mounting pattern |
| Adjustment Type | Manual adjustment with lock nut (S2 version) |
| Fluid Compatibility | Mineral oil based hydraulic fluids (HL, HLP, HLPD) |
Engineering Features & Advantages
- Precision Flow Control: Twin throttle check valves allow independent adjustment of flow in both directions, enabling precise speed control of hydraulic actuators during extension and retraction.
- Integrated Check Function: The built-in check valves permit free flow in one direction and throttled flow in the opposite direction, ensuring controlled motion and preventing unintended reverse flow.
- Modular Sandwich Design: Compact sandwich construction allows direct mounting between directional valves and subplates, reducing piping complexity and installation time.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust housing and precision-machined internal components for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, ensuring drop-in replacement without modification.
- Fine Adjustment: The S2 adjustment version features a sensitive manual adjustment mechanism with lock nut for secure setting retention under vibration.
Typical Industrial Applications
The Rexroth Z2FS16-8-31/S2 twin throttle check valve is commonly used in plastic injection molding machines for precise mold closing and injection speed control, metallurgical presses for controlled ram movement, CNC machine tools for accurate feed and positioning, and general industrial hydraulic systems requiring reliable speed
PRODUCT IMAGES
REXROTH Z2FS16-8-31/S2 / R900457256 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.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- 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 Z2FS16-8-31/S2 / R900457256 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.