Linear solenoid WL7050

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Overview
The WL7050 metering pump solenoid is an electromagnetic actuator used to drive the piston or diaphragm of a metering pump for precise small‑volume dosing. The unit comprises a coil and a movable plunger (armature); when energized, the coil creates a magnetic field that moves the plunger to generate controlled fluid displacement. Compared to motor-driven solutions, solenoid actuators offer compact size, fast response and simplified maintenance requirements.

Applications

• Chemical dispensers and dosing systems
• Water treatment (chemical injection, pH adjustment)
• Medical devices and laboratory instruments
• Food & beverage dosing (flavorings, additives)
• Industrial automation (lubrication, coolant and chemical dispensing)
• Agricultural dosing (fertilizer and pesticide systems)
• Textile processing, printing machinery, fuel additive systems, environmental protection equipment

How it works
The solenoid operates by electromagnetism: energizing the coil generates a magnetic field that displaces the plunger. This linear movement drives the pump piston or diaphragm to transfer a defined volume. When power is removed, a return spring repositions the plunger, allowing the intake valve to open and the chamber to refill. Output volume is controlled by stroke length and actuation frequency.

Features and benefits

• Fast response and accurate dosing control
• Compact footprint for tight installation spaces
• Simple electromechanical design with fewer moving parts
• Reduced maintenance compared with motor-driven actuators
• Optional corrosion-resistant materials for aggressive fluids

Advantages & Disadvantages

• Advantages: precise small-volume dosing, rapid actuation, compactness, energy-efficient operation
• Disadvantages: not optimal for very high flow rates, potential heat at high frequency, possible noise/vibration, shorter life in highly aggressive media without proper materials

Troubleshooting (common issues & causes)

• Failure to start: incorrect supply voltage, damaged coil, loose electrical connections, overheating
• Reduced pumping performance: low input voltage, worn springs or plungers, mechanical wear
• Fluid leakage: damaged plungers, worn diaphragms or seals
• Overheating: continuous high-frequency operation or incorrect voltage — improve cooling or reduce duty cycle
• Vibration/noise: improper mounting, worn components or imbalance — inspect assembly and perform maintenance

Datasheet
Brand: Weilong Technology
Model Number: WL7050
Rated Voltage (V): DC220V
Rated Power (W): 150–200 W
Work Mode: Push and Pull
Holding Force (N): 30 kg
Stroke (mm): 2–5 mm (customizable)
Working Duty: 10%
Service Life: 200,000 cycles
Certification: CE, RoHS, ISO9001
Material: Superior Magnet Iron
Lead Wire Length (mm): 200 mm
Install Style: Screw-mounted
Dimension Tolerance: ±0.1 mm
Water-proof: None (standard)
Insulation Class: B
Hi-Pot Test: AC 600V 50/60Hz 2s
Non-excitation Holding Force: 0
Working Temperature: -10°C to 100°C
Duty Cycle: 1–100%
Payment Term: TT or LC at sight
Sample Order: Yes
Warranty: 1 Year
MOQ: 1000 pcs
Supply Ability: 5000 pcs/week
Delivery Time: 30 days
Port of Loading: Shenzhen

Technical specifications

• Brand: Weilong Technology
• Model: WL7050
• Rated Voltage: DC220V
• Rated Power: 150–200 W
• Work Mode: Push and Pull
• Holding Force: 30 kg
• Stroke: 2–5 mm (customizable)
• Working Duty: 10%
• Service Life: approx. 200,000 cycles
• Certifications: CE, RoHS, ISO9001
• Material: superior magnet iron
• Lead Wire Length: 200 mm
• Installation: screw-mounted
• Dimension Tolerance: ±0.1 mm
• Insulation Class: B
• Hi-Pot Test: AC 600V 50/60Hz 2s
• Operating Temperature Range: -10°C to 100°C
• Duty Cycle Range: 1–100%
• Warranty: 1 year
• MOQ: 1000 pcs; Supply Ability: 5000 pcs/week; Typical Delivery Time: 30 days