Product Overview
The Rexroth SL 10PB3-44/QMG24 (Material Number: R901426805) is a pilot-operated check valve from the proven Rexroth SL series, engineered for leak-free load holding and controlled flow blocking in industrial hydraulic systems. As a modular sandwich-style valve, it is designed for direct mounting between a directional control valve and a subplate or manifold, conforming to ISO 4401 / DIN 24340 size 10 (NG10) interface standards. The valve permits free flow in one direction and blocks reverse flow until a pilot pressure signal is applied to the integrated pilot piston, which hydraulically unseats the poppet to allow controlled return flow. The “QMG24” designation indicates a 24 V DC solenoid-actuated pilot control configuration, enabling precise electrical release of the check function within automated hydraulic circuits. This pilot-operated check valve is a critical safety and load-holding component in systems requiring reliable prevention of actuator drift, load dropping, or unintended reverse motion.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot-Operated Check Valve (Modular / Sandwich Plate Design) |
| Model Designation | SL 10PB3-44/QMG24 / R901426805 |
| Nominal Size | NG10 (Size 10) per ISO 4401 / DIN 24340 |
| Operating Pressure | Up to 315 bar (working pressure, standard industrial grade) |
| Pilot Actuation | 24 V DC solenoid pilot control (QMG24 configuration) |
| Flow Direction | Free flow in one direction; pilot-released blocked flow in reverse |
| Mounting & Connection | Sandwich plate mounting, ISO 4401 / DIN 24340 NG10 interface |
| Sealing | NBR / FKM O-ring seals (standard industrial hydraulic media compatibility) |
| Hydraulic Fluid | Mineral oil based hydraulic fluids per DIN 51524 |
Engineering Features & Advantages
- Leak-Free Load Holding: The precision-ground poppet and seat geometry provide zero-leak sealing in the blocked direction, preventing actuator drift and load dropping in vertical or suspended load applications.
- Pilot-Controlled Release: The integrated pilot piston enables hydraulic or solenoid-actuated unseating of the check valve, allowing controlled reverse flow only when the pilot signal is present — ensuring safe, sequenced operation.
- Modular Sandwich Construction: Designed for direct stacking between directional valves and subplates, minimizing piping, reducing leak points, and simplifying system integration in compact manifold assemblies.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction and wear-resistant internal components for extended service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original REXROTH standards, allowing straightforward retrofit into existing hydraulic systems without rework.
Typical Industrial Applications
This pilot-operated check valve is a critical safety and load-holding component in systems requiring reliable prevention of actuator drift, load dropping, or unintended reverse motion.
PRODUCT IMAGES
REXROTH SL 10PB3-44/QMG24 / R901426805 Pilot-Operated Check Valve
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