Magnetic coil WL4751

electromagneticinsulationAC

Overview
The WL4751 solenoid valve coil is an electromagnetic actuator that converts electrical energy into magnetic force to drive a valve plunger for controlling liquids and gases. Available in AC and DC versions with customizable voltages, power ratings, insulation classes and protection levels. Manufactured with high‑grade copper wire, precision winding and strict quality control to provide stable magnetic force, fast response, low consumption and long service life.

How it works
The coil consists of insulated copper wire wound around a magnetic core. When energized, current through the winding generates a magnetic field that attracts the plunger/armature and shifts the valve sealing element to open, close or regulate fluid flow. Key design and performance factors include:

• Number of turns in the coil
• Diameter and quality of copper wire
• Voltage input and current level
• Magnetic material quality and magnetic circuit design
• Air gap design
• Operating temperature and duty cycle

Basic characteristics
Compact industrial design with high electromagnetic efficiency. Options for continuous-duty or intermittent operation and custom designs to match valve tube size, environmental requirements and performance criteria. Typical attributes are stable magnetic force, rapid response and extended durability.

Product Datasheet
Brand: Weilong Technology
Model Number: WL4751
Rated Voltage: DC or AC available
Rated Power (W): Custom
Service Life: 100 Thousand Times
Certification: CE, RoHS, ISO9001
Material: Copper Coil
Lead Wire Length (mm): 200
Install Style: TBD
Tolerance of Dimension: +/- 0.1 MM
Water-proof: None
Insulation Class: F (155°C)
Hi-Pot Test: AC 600V 50/60Hz 1 s
DC Resistance: 134 Ω
Working Temperature: -10°C - 100°C
Duty Cycle: 1-100%
RoHS Compliance: Yes
Payment Term: TT, or LC At Sight
Sample Order: Yes
Warranty: 1 Year
MOQ: 1000 pcs
Supply Ability: 500000 pcs per Week
Delivery Time: 30 Days
Port of Loading: shenzhen

Applications
Widely used in pneumatic and hydraulic systems, water and gas control, medical devices, automotive systems and industrial automation. Typical applications include control of pneumatic cylinders, hydraulic valves, pumps, water treatment equipment and precision medical instruments.

Advantages

• Fast response and reliable switching
• Compact size and simple electrical control
• Low energy consumption when specified correctly
• Customizable for voltage, size, power and environmental protection

Disadvantages

• Poor thermal design or incorrect voltage may cause overheating and reduced lifespan
• Primarily provides on/off switching; precise proportional control requires additional electronics

Troubleshooting (common faults)

• Coil not operating: check supply voltage, wiring, coil continuity and connections
• Weak magnetic force: verify voltage, coil specification, magnetic elements and air gap
• Overheating: possible overvoltage, continuous operation beyond duty cycle, inadequate heat dissipation
• Slow valve operation: inspect mechanical friction, contamination or weakened electromagnetic force
• Short-circuit faults: may result from insulation damage or moisture ingress

Technical specifications

• Brand: Weilong Technology
• Model: WL4751
• Voltage: AC or DC (custom available)
• Material: Copper coil with F-class insulation (155°C)
• DC Resistance: 134 Ω
• Lead wire length: 200 mm
• Service life: ~100,000 cycles (typical)
• Hi-Pot: AC 600V 50/60Hz 1 s
• Operating temperature: -10°C to 100°C
• Duty cycle: 1–100%
• Certifications: CE, RoHS, ISO9001
• MOQ: 1000 pcs; Supply ability: 500,000 pcs/week
• Warranty: 1 year; Typical delivery: 30 days; Port of loading: Shenzhen