Structured Manufacturing Data (2026)

I/P Converter

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard I/P Converter used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical I/P Converter is characterized by the integration of Torque Motor / Coil Assembly and Flapper-Nozzle Assembly. In industrial production environments, manufacturers listed on CNFX commonly emphasize Aluminum Alloy (Housing) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A device that converts an electrical current signal (I) into a proportional pneumatic pressure signal (P).

Product Specifications

Technical details and manufacturing context for I/P Converter

Definition
An I/P Converter is a critical component within a Positioner system that translates a low-power electrical control signal (typically 4-20 mA) into a proportional pneumatic output pressure (typically 3-15 psi or 0.2-1.0 bar). This allows electronic control systems to precisely actuate pneumatic valves or actuators via the Positioner.
Working Principle
The device receives an input electrical current. An internal coil generates a magnetic force proportional to this current. This force acts on a flapper/nozzle assembly or a force-balance mechanism, which modulates the supply air flow through a pneumatic relay, producing an output pressure that is linearly proportional to the input current signal.
Common Materials
Aluminum Alloy (Housing), Copper (Coil Windings), Stainless Steel (Internal Components), Elastomers (Seals & Diaphragms)
Technical Parameters
  • Input current range (e.g., 4-20 mA) and corresponding output pressure range (e.g., 0.2-1.0 bar). (mA / bar) Customizable
Components / BOM
  • Torque Motor / Coil Assembly
    Converts the input electrical current into a proportional magnetic force.
    Material: Copper, Ferromagnetic Core
  • Flapper-Nozzle Assembly
    Modulates air bleed based on magnetic force to control the pneumatic relay.
    Material: Stainless Steel
  • Pneumatic Relay / Amplifier
    Amplifies the small pressure signal from the flapper-nozzle to control the main output pressure.
    Material: Aluminum, Stainless Steel, Elastomers
  • Feedback Bellows or Diaphragm
    Provides force-balance feedback to achieve precise linear output proportional to input.
    Material: Stainless Steel, Elastomer
  • Housing Part
    Protects internal components and provides mounting and connection points.
    Material: Aluminum Alloy or Engineering Plastic

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for I/P Converter.

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 150 psi (input), 3 to 15 psi (output)
other spec: Flow capacity: 0.5 SCFM, Input signal: 4-20 mA DC, Supply pressure: 20-30 psi
temperature: -20°C to 80°C
Media Compatibility
✓ Clean dry air ✓ Inert gases (nitrogen, argon) ✓ Non-corrosive process gases
Unsuitable: Corrosive or abrasive media (e.g., chlorine gas, high-particulate slurries)
Sizing Data Required
  • Input current signal range (e.g., 4-20 mA)
  • Required output pressure range (e.g., 3-15 psi)
  • Supply air pressure available (e.g., 20-30 psi)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Seal degradation and leakage
Cause: Chemical incompatibility with process fluid leading to seal swelling, hardening, or cracking; thermal cycling causing material fatigue; improper installation or misalignment
Internal component fouling or blockage
Cause: Particulate accumulation from process fluid contamination; scale or deposit formation due to chemical reactions; biological growth in compatible fluids; improper filtration upstream
Maintenance Indicators
  • Visible fluid leakage around flange connections or seal points
  • Abnormal pressure drop across the converter exceeding design specifications
Engineering Tips
  • Implement regular fluid analysis and filtration to maintain fluid cleanliness within manufacturer specifications
  • Establish predictive maintenance using vibration analysis and thermal imaging to detect early mechanical issues before failure

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems IEC 61000-6-2:2016 - Electromagnetic Compatibility (EMC) - Generic Standards - Immunity for Industrial Environments ATEX Directive 2014/34/EU - Equipment for Use in Potentially Explosive Atmospheres
Manufacturing Precision
  • Input Voltage Accuracy: +/-0.5% of full scale
  • Output Signal Linearity: +/-0.1% of full scale
Quality Inspection
  • Environmental Stress Testing (Temperature, Humidity, Vibration)
  • Electrical Performance Verification (Accuracy, Linearity, Response Time)

Factories Producing I/P Converter

Manufacturer profiles with relevant production capability in China

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the typical input/output range for this I/P converter?

This I/P converter typically accepts 4-20mA electrical current input and converts it to a proportional 3-15 psi pneumatic pressure output, making it compatible with standard industrial control systems.

What materials ensure durability in industrial environments?

The converter features an aluminum alloy housing for corrosion resistance, stainless steel internal components for longevity, copper coil windings for efficient electrical performance, and elastomer seals/diaphragms for reliable pneumatic sealing.

How does the flapper-nozzle assembly work in this converter?

The flapper-nozzle assembly converts small electrical signals from the torque motor into precise pneumatic pressure changes. As the flapper moves relative to the nozzle, it modulates air flow to create proportional pressure output through the pneumatic relay.

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.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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