3/4-Way Spool Type Solenoid Operated Threaded Cartridge Valve
Product Overview
The 3/4-Way Spool Type Solenoid Operated Threaded Cartridge Valve is a solenoid-driven three-position four-way directional control valve with spool structure. It adopts threaded cartridge installation and can be embedded into standard cavities of hydraulic manifold blocks.
Equipped with four oil ports, the valve is used to control bidirectional movement and stop state of double-acting hydraulic cylinders and hydraulic motors. A variety of spool center functions are optional, such as closed center, open center and float center, meeting diverse system design demands. With compact modular structure, it is widely used in integrated hydraulic systems of industrial machinery and mobile equipment.
Key Technical Specifications
- Structure: Sliding spool construction
- Function: 3 Position 4 Way
- Mounting: Standard threaded cartridge installation
- Max working pressure: Up to 315 bar
- Driving mode: Double solenoid operation (solenoids fitted on both ends)
- Optional coil voltage: DC12V, DC24V, AC110V, AC220V
- Spool center types: Closed center, Open center, Float center, etc.
- Working medium: Anti-wear hydraulic oil
- Fluid temperature: -20℃ ~ +85℃
- Recommended oil cleanliness: NAS Class 8 or better
- Feature reminder: Spool design brings slight inherent internal leakage, not suitable for circuits requiring strict zero leakage.
Working Principle
When both solenoids are de-energized, symmetrical return springs maintain the spool in the neutral middle position, and the hydraulic circuit keeps the status defined by neutral spool function.
When one side solenoid is energized, electromagnetic force pushes the spool to slide axially toward the opposite side, switching internal flow passages to drive the actuator forward. Once the solenoid loses power, the spring pushes the spool back to neutral.
When the other solenoid is energized, the spool slides in the reverse direction, reversing the oil flow and making the actuator move backward. Power-off resets the spool to the middle position to stop movement.
Core Advantages
1. Double-solenoid control, realize forward, reverse and stop control of actuators
2. Threaded cartridge compact structure, embedded installation saves manifold layout space
3. Multiple neutral spool functions available for flexible hydraulic system design
4. Standard universal cartridge valve installation dimensions, excellent interchangeability
5. Stable flow performance, smooth commutation with low hydraulic impact
6. Various coil voltage options to satisfy global equipment power supply requirements
7. Easy disassembly and replacement, no need to take apart the whole manifold block during maintenance
Typical Applications
- Double-acting hydraulic cylinder forward/reverse & stop control
- Hydraulic motor positive/reverse rotation control
- Automation production equipment and machine tool hydraulic systems
- Hydraulic power units with modular valve blocks
- Agricultural machinery, light engineering machinery auxiliary hydraulic circuits
- Logistics lifting devices, clamping and positioning equipment
