Industry-Verified Manufacturing Data (2026)

Coil

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Coil used in the Electrical Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Coil is characterized by the integration of Copper Windings and Bobbin. In industrial production environments, manufacturers listed on CNFX commonly emphasize Copper wire construction to support stable, high-cycle operation across diverse manufacturing scenarios.

An electromagnetic component that generates a magnetic field when energized, used to actuate the valve mechanism in a solenoid valve bank.

Product Specifications

Technical details and manufacturing context for Coil

Definition
The coil is the electromagnetic actuator within a solenoid valve bank that converts electrical energy into mechanical motion. When electrical current flows through the coil windings, it creates a magnetic field that attracts the valve plunger or armature, causing the valve to open or close. In a valve bank configuration, multiple coils work together to control the flow of fluids or gases through individual valve ports.
Working Principle
The coil operates on electromagnetic principles. When voltage is applied to the coil terminals, current flows through the copper windings, creating a magnetic field. This magnetic field attracts the ferromagnetic plunger, overcoming spring force and mechanical resistance to move the valve mechanism. When de-energized, the magnetic field collapses and the spring returns the plunger to its original position.
Common Materials
Copper wire, Insulation material, Bobbin/core material
Technical Parameters
  • Coil dimensions including outer diameter, inner diameter, and length (mm) Customizable
Components / BOM
  • Copper Windings
    Conducts electrical current to generate magnetic field
    Material: Copper wire
  • Bobbin
    Provides structural support for windings and insulation
    Material: Plastic or composite material
  • Terminal Pins
    Electrical connection points for power supply
    Material: Brass or copper alloy
  • Insulation Layer
    Prevents electrical shorts between windings
    Material: Polyester film or enamel coating
Engineering Reasoning
12-24 VDC, 0.1-2.0 A, magnetic flux density 0.5-1.2 T
Coil temperature exceeds 155°C (Class F insulation limit), insulation resistance drops below 1 MΩ at 500 VDC, magnetic saturation at 1.5 T
Design Rationale: Joule heating (I²R losses) exceeding thermal dissipation capacity, insulation breakdown due to partial discharge at >500 V/mm electric field strength, magnetic core saturation reducing inductance by >30%
Risk Mitigation (FMEA)
Trigger Continuous operation at 2.5 A (125% rated current) for >30 minutes
Mode: Insulation thermal degradation leading to inter-turn short circuit
Strategy: Embedded PTC thermistor with cutoff at 130°C, current limiting to 2.0 A via PWM control
Trigger Voltage transient exceeding 48 VDC (200% rated voltage) for >10 μs
Mode: Dielectric breakdown between coil layers causing ground fault
Strategy: TVS diode clamping at 36 VDC, reinforced insulation with 1.5 mm creepage distance

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Coil.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 5000 psi (dependent on valve body rating)
other spec: Voltage tolerance: ±10% of rated voltage, Insulation class: H (180°C), Duty cycle: Continuous or intermittent (specify)
temperature: -20°C to +120°C (operating), -40°C to +150°C (storage)
Media Compatibility
✓ Hydraulic oil (mineral-based) ✓ Compressed air (filtered, dry) ✓ Water/glycol mixtures
Unsuitable: Conductive or abrasive slurries with high particulate concentration (>5% by weight)
Sizing Data Required
  • Required force/stroke (N/mm)
  • Supply voltage and frequency (VAC/VDC, Hz)
  • Valve flow coefficient (Cv) and response time requirement

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion
Cause: Exposure to corrosive fluids or atmospheric conditions, leading to material degradation, pitting, and eventual leaks or structural failure.
Fouling
Cause: Accumulation of scale, debris, or biological growth on coil surfaces, reducing heat transfer efficiency and increasing pressure drop.
Maintenance Indicators
  • Visible leaks or moisture around coil connections
  • Abnormal temperature differentials or reduced heat transfer performance
Engineering Tips
  • Implement regular chemical cleaning or mechanical brushing to prevent fouling and maintain thermal efficiency
  • Apply protective coatings or use corrosion-resistant materials compatible with the operating environment

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems ASTM A480/A480M - Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip CE Marking - Conformity with EU directives for pressure equipment (PED 2014/68/EU) or machinery (2006/42/EC)
Manufacturing Precision
  • Outer Diameter: +/- 0.5% of nominal diameter
  • Coil Pitch Uniformity: +/- 2% of specified pitch
Quality Inspection
  • Dimensional Verification (using CMM or laser scanning)
  • Non-Destructive Testing (Eddy Current or Ultrasonic testing for material integrity)

Factories Producing Coil

Verified manufacturers with capability to produce this product in China

✓ 95% Supplier Capability Match Found

P Project Engineer from Brazil Feb 14, 2026
★★★★★
"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Coil so far."
Technical Specifications Verified
S Sourcing Manager from Canada Feb 11, 2026
★★★★★
"Testing the Coil now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
P Procurement Specialist from United States Feb 08, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

8 sourcing managers are analyzing this specification now. Last inquiry for Coil from Brazil (1h ago).

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Frequently Asked Questions

What materials are used in this electromagnetic coil for solenoid valves?

This coil is constructed with high-conductivity copper wire windings, durable insulation material to prevent short circuits, and a bobbin/core material that maintains structural integrity during operation in solenoid valve banks.

How does this coil actuate valves in a solenoid valve bank?

When energized with electrical current, the coil generates a precise magnetic field that moves the valve mechanism, enabling controlled fluid or gas flow in industrial applications requiring reliable valve actuation.

What are the key components in the BOM for this coil?

The bill of materials includes the bobbin (core structure), copper windings (for electromagnetic generation), insulation layer (for electrical safety), and terminal pins (for secure electrical connections in valve systems).

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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