Product Overview
The Rexroth LFA 50 KWA-71 (Material No. R900938209 / 12504828) is a high-performance control cover engineered for use with two-way cartridge valves in industrial hydraulic systems. As a key component within Rexroth’s modular cartridge valve platform, this control cover serves as the pilot interface that governs the main stage spool position, enabling precise directional, pressure, and flow control functions. The LFA series control covers are designed to mount directly onto standard cartridge valve receiving bores, providing a compact, leak-tight pilot control assembly that integrates seamlessly into manifold block systems. With the KWA-71 pilot configuration, this cover facilitates controlled opening and closing of the main cartridge poppet or spool, delivering reliable directional spool valve performance for demanding high-pressure industrial circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve — Control Cover for Cartridge Valve (Directional Spool Valve Pilot Interface) |
| Model Designation | LFA 50 KWA-71 |
| Material / Part Number | R900938209 / 12504828 |
| Nominal Size | NG50 (Size 50 cartridge valve interface) |
| Pilot Configuration | KWA-71 pilot control pattern — directional spool actuation with defined pilot oil supply and return |
| Operating Pressure | Up to 350 bar (standard industrial grade for Rexroth cartridge valve systems) |
| Pilot Pressure Range | Typically 10–315 bar depending on circuit configuration |
| Mounting & Connection | Direct bolt-on to NG50 cartridge valve receiving bore; standard ISO / Rexroth manifold interface |
| Sealing | O-ring face seal at cartridge interface; leak-tight pilot gallery separation |
| Hydraulic Fluid Compatibility | Mineral oil based hydraulic fluids (HL, HLP, HLPD, HVLP) per DIN 51524 |
| Fluid Temperature Range | -20°C to +80°C (standard NBR seal configuration) |
Engineering Features & Advantages
- Precision Performance: The hydraulic valve — control cover for cartridge valve (directional spool valve pilot interface) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Constructed for continuous duty with durable, corrosion-resistant materials and proven engineering for maximum system uptime.
- Direct Fit Replacement: Precision-manufactured to original REXROTH specifications for direct replacement, minimising downtime and eliminating fitment issues.
- Rated Capability: Rated for pressure ratings up to 350 bar, supporting stable operation across the full working range.
Typical Industrial Applications
With the KWA-71 pilot configuration, this cover facilitates controlled opening and closing of the main cartridge poppet or spool, delivering reliable directional spool valve performance for demanding high-pressure industrial circuits.
PRODUCT IMAGES
REXROTH LFA 50 KWA-71/12504828 / R900938209 Control Cover for Cartridge 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 LFA 50 KWA-71/12504828 / R900938209 Solenoid Directional Spool Valve. This Germany-made hydraulic component features a robust spool design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.