Product Overview
The Rexroth LFA 25 DB2-71/420 (Material No. R900912784) is a high-performance control cover designed for use with two-way cartridge valves in industrial hydraulic systems. As a pressure control cover, it integrates a pilot-operated pressure relief function (DB2 pilot valve) that governs the main cartridge valve’s opening and closing behavior, thereby regulating system pressure with high precision. The LFA series control covers are engineered to mount directly onto standard Rexroth cartridge valve receiving bores, forming a compact, high-flow pressure control assembly. With a nominal size of NG25 and a pressure rating of up to 420 bar, this cover is suited for demanding applications requiring reliable overpressure protection and precise pressure regulation in manifold-based hydraulic circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pressure Control Valve — Control Cover for Cartridge Valve |
| Model Designation | LFA 25 DB2-71/420 |
| Material Number | R900912784 |
| Nominal Size | NG25 (Cartridge Valve Interface) |
| Pilot Valve Type | DB2 — Pilot-Operated Pressure Relief Valve |
| Operating Pressure | Up to 420 bar (Rated) |
| Mounting & Connection | Standard Rexroth NG25 Cartridge Valve Interface (ISO 7368) |
| Control Function | Pressure Control (Relief / Limiting) |
| Seal Material | NBR (Standard); FKM available on request |
Engineering Features & Advantages
- Precision Pressure Control: The integrated DB2 pilot-operated relief valve provides accurate and stable pressure regulation across the full operating range, ensuring reliable system overpressure protection.
- High-Pressure Capability: Rated for continuous operation up to 420 bar, suitable for high-pressure industrial hydraulic circuits and demanding manifold applications.
- Compact Cartridge Design: The LFA control cover mounts directly onto the NG25 cartridge valve receiving bore, eliminating the need for separate piping and reducing installation space and leak points.
- Industrial Reliability: Built for continuous operation under severe industrial conditions with robust construction and high-quality sealing for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth OEM standards, ensuring drop-in replacement without modification.
Typical Industrial Applications
This control cover is commonly used in hydraulic manifold systems for plastic injection molding machines, metallurgical presses, hydraulic press systems, and general industrial hydraulic power units requiring precise pressure relief and control. It is also suitable for marine hydraul
PRODUCT IMAGES
REXROTH LFA 25 DB2-71/420 / R900912784 Control Cover for Cartridge Valve (Pressure Control)
⚡ 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 25 DB2-71/420 / R900912784 Pilot Operated Pressure Relief Valve. This German-made hydraulic component features a pilot-operated design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.
