Product Overview
The Rexroth Z4S10-30 (Material No. R900514779) is a pilot operated check valve designed for leak-free load holding and controlled blocking of hydraulic flow in industrial systems. As part of Rexroth’s modular valve program, this unit is typically installed between a directional control valve and its subplate or manifold, allowing free flow in one direction while positively blocking reverse flow until a pilot pressure signal is applied to release the poppet. This design prevents load drift, actuator creep, and unintended movement of suspended loads, making it a critical safety and control component in demanding hydraulic circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Check Valve (Modular / Sandwich Plate Design) |
| Model Designation | Z4S10-30 / R900514779 |
| Nominal Size | NG10 (Size 10) per ISO 4401 / DIN 24340 |
| Operating Pressure | Up to 315 bar (working pressure, standard industrial grade) |
| Pilot Pressure Ratio | Standard pilot ratio (approximately 1:4.5 area ratio, model dependent) |
| Mounting & Connection | Subplate / Sandwich mounting per ISO 4401-05, port pattern NG10 |
| Sealing Material | NBR (standard); FKM available for elevated temperature service |
| Fluid Compatibility | Mineral oil based hydraulic fluids per DIN 51524; HLP, HLVP |
Engineering Features & Advantages
- Leak-Free Load Holding: The poppet-type seat design provides zero-leak blocking in the closed position, preventing drift of cylinders and motors under sustained load.
- Pilot Controlled Release: Reverse flow is unlocked only when pilot pressure is applied, enabling controlled lowering and safe sequencing of actuators in multi-function circuits.
- Modular Sandwich Construction: Compact NG10 interface integrates directly between directional valves and subplates, minimizing piping, leak points, and installation footprint.
- Industrial Reliability: Hardened, precision-ground poppet and seat components ensure long service life and consistent sealing performance under continuous industrial duty cycles.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth Z4S series specifications, ensuring drop-in interchangeability.
Typical Industrial Applications
The Rexroth Z4S10-30 pilot operated check valve is widely deployed in hydraulic systems requiring secure load holding and controlled motion, including plastic injection molding machines, metallurgical presses and rolling mills, construction and marine hydraulic systems, CNC machine tools, and general industrial power units where actuator drift or reverse flow must be reliably prevented.
PRODUCT IMAGES
REXROTH Z4S10-30/ / R900514779 Pilot Operated 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 Z4S10-30/ / R900514779 Pilot Operated Check Valve. This Germany-made hydraulic component features a robust poppet design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.