Proportional Hydraulic Multi-Way Valve
2 month ago
Product details
1. Basic Introduction
Modular load-sensing proportional multi-spool valve, core control component for mobile hydraulic machinery. Combined by inlet section + multiple working spool sections + end cover, freely stack 1~12 spools as required .
Control options: manual pilot, hydraulic pilot, 12/24VDC electro-proportional control & CAN bus proportional control .
Core design: pre-pressure compensation + LS load sensing, outlet flow independent of load pressure, stepless speed regulation for cylinders & hydraulic motors .
2. Main Technical Parameters
- Max working pressure: 320~420bar (32~42MPa)
- Single spool rated flow: 30~300L/min, inlet total flow up to 500L/min
- Control voltage: DC12V / DC24V, proportional drive current: 200~600mA PWM
- Load sensing: LS feedback for variable pump energy-saving unloading
- Optional spool functions: built-in relief valve, counterbalance valve, anti-cavitation replenishing valve, load holding valve
3. Core Features
1. Load-independent flow: Each actuator runs at customized speed simultaneously without mutual interference under mixed load .
2. High control precision, small hysteresis, smooth startup & stop with no hydraulic impact .
3. LS energy-saving system: Pump outputs only required pressure & flow to reduce heat loss and fuel consumption.
4. Modular assembly, flexible spool combination, easy maintenance and aftermarket replacement .
5. High-strength alloy valve body, precision ground spool for wear resistance and long service life.
4. Application Scope
Concrete pump truck boom system, truck-mounted crane, mini excavator, aerial work platform, loader, agricultural machinery, drilling rig and other mobile construction equipment.
I. Definition and Functions
1. Definition
AProportional Hydraulic Multi-Way Valveis a hydraulic valve that proportionally controls hydraulic oil flow, direction, and pressure via electrical signals (e.g., current or voltage). It integrates directional control and proportional regulation technologies, enabling synchronized or independent proportional control of multiple actuators (e.g., hydraulic cylinders, motors).
2. Core Functions
• Directional Control: Drives valve spool movement via solenoids to redirect hydraulic oil flow, enabling actuator start/stop or directional reversal.
• Flow Regulation: Continuously adjusts valve port opening through proportional solenoid input signals, controlling hydraulic oil flow for actuator speed modulation.
• Pressure Compensation: Built-in pressure compensators maintain consistent output flow despite load variations, enhancing system stability.
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II. Technical Features
1. Proportional Control Technology
• Utilizes proportional solenoids as electro-mechanical converters, generating force/displacement proportional to input electrical signals for high-precision control.
• Supports closed-loop control (e.g., with integrated displacement sensors) to further improve accuracy and dynamic response.
2. Modular Design
• Composed of multiple directional control sections, each independently controlling one actuator. Supports parallel, series, or composite oil circuit configurations.
• Integrates auxiliary functions (e.g., relief valves, overload protection, makeup valves) to simplify hydraulic system design.
3. Load-Sensing Technology
• Employs load-sensing shuttle valves and pressure compensators to monitor load pressure in real time and adjust pump output, reducing energy waste.
• In fixed-displacement pump systems, compensators maintain pump outlet pressure ~10 bar above load pressure, minimizing overflow losses.
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III. Application Scenarios
1. Construction Machinery
• Excavators: Controls synchronized movement of boom, arm, and bucket for efficient operation.
• Cranes: Enables smooth telescoping and rotation of the boom for safe lifting.
• Concrete Pump Trucks: Precisely controls boom articulation for high-rise concrete placement.
2. Industrial Automation
• Stamping Presses: Regulates hydraulic cylinder speed and force for diverse material processing.
• Injection Molding Machines: Controls mold opening/closing speed and clamping pressure for product quality consistency.
3. Agricultural Machinery
• Combine Harvesters: Adjusts header height and conveyor speed for optimized harvesting efficiency.
• Tractors: Controls hydraulic hitch system elevation for varied tillage requirements.
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IV. Performance Advantages
1. High Precision Control
• Proportional solenoids and closed-loop technology achieve precise flow/pressure regulation, meeting demanding operational needs.
• Low hysteresis (typically ≤3%) and high repeatability (≤1%) ensure consistent actuator movement.
2. Energy Efficiency
• Load-sensing technology reduces overflow losses, lowering system energy consumption.
• Variable-displacement pump systems directly control pump output via load pressure signals, further improving efficiency.
3. Reliability
• Strong contamination resistance for harsh environments (e.g., dust, high temperatures).
• Modular design facilitates easy maintenance and component replacement, minimizing downtime.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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