Spool hydraulic directional control valve WL 6116

electrically-operatedelectro-pneumaticnormally closed

Product overview
Directional proportional valve Weilong WL 6116 is an electrically controlled hydraulic/air control valve that provides continuous regulation of flow direction and rate. The valve uses a proportional solenoid to enable variable spool displacement, delivering smooth actuator movement, adjustable speed control and improved positioning accuracy. Main components: spool, proportional solenoid, valve body, ports and electronic interface.

Working principle
The valve receives an electrical command (voltage/current) from a controller. The proportional solenoid generates force proportional to the input signal and displaces the spool accordingly. Small input signals produce small spool movement and limited flow; larger signals open additional flow paths for higher flow. Spool position connects specific ports to control direction and flow rate. In closed-loop systems, position or pressure feedback can be used to refine the command for accurate and stable motion.

Applications

• Industrial automation: control of hydraulic cylinders and motors in production and assembly equipment.
• Robotics and material handling: smooth acceleration/deceleration and precise positioning.
• Machine tools, presses and injection molding: controlled actuator motion and variable speeds.
• Mobile hydraulics: excavators, loaders, agricultural machinery, cranes and special vehicles.
• Process automation: gates, dampers and positioning mechanisms.

Advantages & Disadvantages

• Advantages: precise flow and direction control; smooth transitions; electronic interface for PLCs; flexible performance for automation and OEM integration.
• Disadvantages: higher cost versus conventional valves; requires appropriate drivers and tuning; sensitive to contamination due to small spool clearances; can generate hydraulic heat under continuous throttling.

Troubleshooting & Maintenance

• Valve unresponsive: check power supply, wiring, connector, control signal and proportional driver.
• Slow actuator motion: verify pump flow, valve sizing and check for blockages.
• Jerky motion: inspect for hydraulic contamination, air in system, sticky spool or incorrect tuning.
• Incorrect direction: confirm A/B port connections and spool configuration.
• Excessive heat: review pressure drop, unnecessary throttling and pump settings.
• Leakage or poor positioning: inspect seals, fittings, spool wear and feedback sensors.
• Preventive maintenance: use proper filtration, clean hydraulic fluid and monitor electrical connections and temperature.

Selection & design tips

• Determine operating and maximum pressures; select valves with appropriate pressure ratings.
• Calculate required flow rate to ensure control resolution and avoid pressure drops.
• Choose correct spool configuration (2/3/4-way) and port layout for the circuit.
• Match electrical compatibility (voltage, current, signal type, connectors) to controllers/PLCs.
• Consider response dynamics versus system stability for motion control.
• Verify fluid compatibility, viscosity range, sealing materials and operating temperature.
• Control contamination with appropriate filtration; avoid oversizing/undersizing the valve.
• Plan fail-safe behavior for loss of power or control signal and test the valve in the complete system.

Technical specifications

• Brand: Weilong
• Model: WL 6116
• Rated voltage: DC 12V or 24V
• Rated power: 7.2 W
• Working pressure: 0.2 MPa
• Airflow rate: 45–107 L/min
• Lead wire length: 200 mm
• Service life: ~200,000 cycles
• Insulation class: B
• Operating temperature: -10°C to 90°C
• Duty cycle: 1–100%
• Certifications: CE, RoHS, ISO9001
• Warranty: 1 year
• Supply capacity: 5,000 pcs/week; Delivery time: 30 days; Port: Shenzhen