Load-Sensing Hydraulic Manifold
Load-Sensing Hydraulic Manifold, QFZMG28H
The QFZMG28H load-sensing hydraulic manifold is designed based on the LUDV principle and is suitable for closed-center variable displacement pump systems. Proportional flow distribution among multiple actuators is achieved through load pressure compensation. Targeted at high-pressure, high-flow applications, the valve is mainly used in construction machinery such as rotary drilling rigs and crawler cranes, where continuity of combined motions is critical.
Features & Advantages
- LUDV flow distribution mechanism: When system flow is insufficient, flow is distributed proportionally among actuators, maintaining continuous combined operation.
- Multi-actuator control capability: Supports control of up to 8 actuators, suitable for complex hydraulic system configurations.
- System stability design: Integrates load-holding valves, secondary pressure relief valves, and load pressure compensators, delivering high repeatability and low hysteresis.
- Proportional control and tuning capability: Utilizes hydraulic pilot proportional control and supports flow adjustment via spool stroke limiting.
Selection Guidelines
2 Spool Load-Sensing Hydraulic Manifold
8 Spool Load-Sensing Hydraulic Manifold
Specifications
| Fluid Media | Hydraulic oil |
|---|---|
| Mounting Type | Flanged connection |
| Control Type | Hydraulic/Solenoid |
| Seal Material | NBR/FKM (Viton) |
| Body Material | Cast iron |
| Nominal Diameter | 28mm |
| Max. Flow Rate | 400L/min |
| Max. Working Pressure | 350bar |
Dimension Drawing
Diagram
Customer Cases
A mining dump truck showcased by Shantui Heavy Industry at the 2024 Shanghai Bauma Exhibition, equipped with QFZMG32 series load-sensing hydraulic manifold.
A rotary drilling rig manufactured by a construction machinery enterprise in China, using QFZMG28H series load-sensing hydraulic manifold.
A directional drilling rig manufactured by a Guizhou-based Chinese manufacturer, using QFZMG28H series load-sensing hydraulic manifold.
A roadway drilling rig produced by a drilling equipment manufacturer in China, equipped with QFZMG15H series load-sensing hydraulic manifold.
A prototype tracked vehicle developed by a listed company in Hebei Province, tested with QFZMG14H series load-sensing hydraulic manifold.