Editorial Technical Reference

Coil/Solenoid

This page explains how Coil/Solenoid is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Electromagnetic component that converts electrical energy into mechanical motion to actuate valves.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Coil/Solenoid

Definition
A coil/solenoid is an electromagnetic actuator used within valve/driver systems for pneumatic or electric applications. Its primary function is to control fluid flow by generating a magnetic field when energized, which moves a plunger or armature to open or close the valve mechanism. The coil consists of copper wire wound around a ferromagnetic core, with insulation material separating the windings. When an electric current passes through the coil, the resulting magnetic field attracts the plunger, converting electrical energy into linear mechanical motion. This motion is then used to actuate the valve, either directly or through a pilot mechanism. The coil/solenoid is a component-level product, meaning it is typically integrated into a larger valve assembly by the system manufacturer. Key parameters for selection include operating pressure (1.0–1.6 MPa), nominal voltage (24 V DC ±10%, per IEC 60038), coil resistance (20–40 Ω at 20°C), power consumption (5–10 W, continuous duty), response time (10–50 ms), operating temperature (-40 to 85°C, per IEC 60068-2-1/2), ingress protection (IP54–IP65, per IEC 60529), insulation class (F, per IEC 60085), coil material (copper, per ASTM B3), and weight (0.2–0.5 kg). These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The coil/solenoid is designed for use in industrial machinery and equipment, where reliable actuation is critical. Proper installation and maintenance are essential to ensure long service life. Signs of potential failure include increased response time, overheating, or intermittent operation. Regular inspection of the coil resistance and insulation integrity is recommended. Always consult the manufacturer's documentation for specific installation, operation, and maintenance procedures.
Working Principle
When electrical current flows through the coiled wire, it creates a magnetic field that attracts a ferromagnetic plunger, converting electrical energy into linear mechanical motion to operate the valve. The strength of the magnetic field depends on the number of turns, the current, and the core material. The plunger moves against a spring or other return mechanism, and when the current is removed, the plunger returns to its original position. This principle allows precise control of valve opening and closing, enabling automated fluid control in industrial systems.
Common Materials
Copper wire, Insulation material, Ferromagnetic core
Technical Parameters
ParameterTypical rangeNotes & selection driver
Operating Pressure1.0–1.6 MPaBelow 1.0 MPa the seat load is insufficientISO 5208
Nominal Voltage24 ±10% V DCOther voltages on requestIEC 60038
Coil Resistance20–40 ΩAt 20°C
Power Consumption5–10 WContinuous duty
Response Time10–50 msOpening and closing
Operating Temperature-40–85 °CExtended range optionalIEC 60068-2-1/2
Ingress ProtectionIP54–IP65Dust and water jet protectionIEC 60529
Insulation ClassFClass H availableIEC 60085
Coil MaterialCuCopper wire, class 180ASTM B3
Weight0.2–0.5 kgDepends on size

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Wire winding Part
    Conducts electrical current to generate magnetic field
    Material: Copper or aluminum
  • Bobbin Part
    Supports and insulates the wire winding
    Material: Plastic or composite material
  • Terminal connections Part
    Electrical connection points for power supply
    Material: Brass or copper alloy
  • Insulation layer Part
    Prevents electrical shorts and protects the winding
    Material: Polyester, polyimide, or epoxy
  • Plunger Optional
    The ferromagnetic core the coil pulls in — the part that actually moves the valve.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 300 psi (standard), up to 1000 psi (high-pressure variants)
duty cycle: Continuous or intermittent (typically 100% ED for DC, 50% ED for AC)
temperature: -20°C to +80°C (standard), up to +120°C (high-temp variants)
response time: 10-50 ms (depending on size and voltage)
voltage range: 12V DC to 240V AC/DC
Media Compatibility
✓ Hydraulic oil (mineral-based) ✓ Compressed air (dry, filtered) ✓ Water/glycol mixtures (non-corrosive)
Unsuitable: Highly corrosive fluids (e.g., strong acids, chlorine solutions) or abrasive slurries with >5% solids concentration
Sizing Data Required
  • Required force/stroke (N/mm)
  • Supply voltage/frequency (V/Hz)
  • Valve type/port size (e.g., 1/4" NPT, G1/2)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Insulation breakdown
Cause: Thermal degradation from overheating due to excessive current, voltage spikes, or poor ventilation, leading to short circuits or open windings.
Mechanical binding or sticking
Cause: Contamination (e.g., dirt, debris, moisture) or corrosion on the plunger/armature and sleeve, preventing proper movement and causing coil burnout or failure to actuate.
Maintenance Indicators
  • Audible buzzing or humming during operation, indicating improper seating, loose components, or electrical issues.
  • Visible overheating (discoloration, burning smell) or intermittent operation, suggesting electrical faults or mechanical resistance.
Engineering Tips
  • Ensure proper voltage supply and use surge protection to prevent electrical stress; regularly inspect for cleanliness and apply appropriate lubricants to moving parts to reduce friction.
  • Implement routine thermal imaging or resistance testing to detect early insulation wear and verify environmental controls (e.g., sealing, cooling) to minimize exposure to contaminants and moisture.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
IEC 60076-6 Power transformers - Reactors EN 60204-1 Safety of machinery - Electrical equipment of machines

Quoted from the published standard.

Manufacturing Precision
  • Wire diameter tolerance: +/-0.01mm
  • Coil winding pitch uniformity: +/-5%
Quality Inspection
  • Insulation resistance test (megohmmeter)
  • Inductance measurement (LCR meter)

Manufacturers of Coil/Solenoid

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Frequently Asked Questions

What is the operating pressure range for this coil/solenoid?

The reference operating pressure range is 1.0–1.6 MPa. However, this is a directory reference and must be confirmed for the specific model and application with the legal manufacturer or supplier.

What is the nominal voltage and coil resistance?

The nominal voltage is 24 V DC ±10% (per IEC 60038), and the coil resistance is 20–40 Ω at 20°C. These values are typical reference ranges and should be verified for the exact product.

What is the ingress protection rating?

The ingress protection rating is IP54–IP65, per IEC 60529, providing dust and water jet protection. Confirm the exact rating for your model.

What are the operating temperature limits?

The operating temperature range is -40 to 85°C, per IEC 60068-2-1/2. Extended ranges may be optional, but verify with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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