Industry-Verified Manufacturing Data (2026)

Feedthrough

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Feedthrough 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 Feedthrough is characterized by the integration of Flange and Conductor / Penetrator. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel (304, 316) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A vacuum-tight electrical, fluid, or mechanical connection that passes through the wall of a vacuum chamber.

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Product Specifications

Technical details and manufacturing context for Feedthrough

Definition
A feedthrough is a critical component of a vacuum chamber that allows electrical power, signals, fluids, or mechanical motion to be transmitted from the external environment into the vacuum environment without compromising the chamber's vacuum integrity. It serves as a sealed interface, maintaining the required pressure differential.
Working Principle
The feedthrough creates a hermetic seal where a conductor, tube, or shaft penetrates the chamber wall. This is achieved using specialized sealing techniques such as glass-to-metal seals, ceramic-to-metal seals, or elastomer O-rings, depending on the application's vacuum level, temperature, and media requirements.
Common Materials
Stainless Steel (304, 316), Copper, Alumina Ceramic, Glass, Viton (FKM)
Technical Parameters
  • The flange size (e.g., CF, KF, ISO) and the overall length or penetration depth. (mm) Customizable
Components / BOM
  • Flange
    Provides the mechanical and vacuum seal interface to mount the feedthrough to the chamber wall.
    Material: Stainless Steel
  • Conductor / Penetrator
    The central element (e.g., wire, tube, shaft) that transmits the signal, power, fluid, or motion.
    Material: Copper, Stainless Steel
  • Insulator / Seal
    Electrically insulates the conductor from the flange and provides the primary vacuum seal.
    Material: Alumina Ceramic, Glass
Engineering Reasoning
1e-7 to 1e-9 mbar vacuum pressure range, -40°C to 200°C temperature range, 0-600 VDC electrical rating
Leak rate exceeds 1e-9 mbar·L/s (helium leak detection threshold), dielectric breakdown at 650 VDC, thermal expansion mismatch exceeding 15 ppm/K differential
Design Rationale: Metal-to-ceramic brazing failure due to coefficient of thermal expansion mismatch (CTE: Kovar 5.3 ppm/K vs. Alumina 7.2 ppm/K), outgassing of polymer seals above 150°C, electron multipacting at 10^-3 mbar pressure range
Risk Mitigation (FMEA)
Trigger Thermal cycling between -40°C and 200°C at 5°C/min rate
Mode: Ceramic-to-metal seal fracture creating 1e-6 mbar·L/s leak path
Strategy: CTE-matched material selection (Ni-Fe alloy with 5.5 ppm/K), graded brazing with Ag-Cu-Ti filler, thermal stress relief annealing at 850°C for 2 hours
Trigger Partial pressure of water vapor exceeding 1e-4 mbar at 300 K
Mode: Surface flashover at 450 VDC across 10 mm ceramic insulator
Strategy: RF-sputtered alumina coating with 99.5% purity, bake-out procedure at 350°C for 48 hours, getter material integration (Zr-V-Fe alloy)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Feedthrough.

vacuum chamber electrical feedthrough stainless steel vacuum feedthrough flange high vacuum feedthrough for machinery ceramic insulator vacuum feedthrough custom vacuum feedthrough manufacturing

Applied To / Applications

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

Vacuum Chamber
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: High vacuum (10^-9 mbar) to 10 bar overpressure
other spec: Electrical: Up to 20 kV, Fluid: Flow rates 0-100 L/min, Mechanical: Torque up to 50 Nm
temperature: -200°C to +450°C (depending on seal material)
Media Compatibility
✓ Ultra-high vacuum environments ✓ Cryogenic fluids (LN2, LHe) ✓ High-purity gas systems
Unsuitable: Highly corrosive chemical slurries with abrasive particles
Sizing Data Required
  • Chamber wall thickness and material
  • Required number and type of connections (electrical/fluid/mechanical)
  • Operating pressure differential across the chamber wall

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Seal Degradation
Cause: Chemical attack from process fluids, thermal cycling, or mechanical wear compromising the feedthrough's hermetic seal, leading to leaks or contamination ingress.
Electrical Insulation Breakdown
Cause: Moisture ingress, thermal stress, or voltage spikes causing insulation failure, resulting in short circuits, arcing, or loss of signal integrity.
Maintenance Indicators
  • Visible fluid leakage or moisture accumulation around the feedthrough housing
  • Audible arcing or crackling sounds, or erratic instrument readings indicating electrical faults
Engineering Tips
  • Implement regular seal integrity testing (e.g., helium leak detection) and use compatible sealing materials rated for the specific chemical and thermal environment.
  • Install surge protection devices, ensure proper grounding, and maintain environmental controls (e.g., humidity, temperature) to prevent electrical insulation degradation.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ANSI/ASME B31.3 - Process Piping DIN EN 10204 - Metallic Products Types of Inspection Documents
Manufacturing Precision
  • Bore Diameter: +/-0.01mm
  • Surface Flatness: 0.05mm
Quality Inspection
  • Helium Leak Test
  • Dimensional Verification with CMM

Factories Producing Feedthrough

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

S Sourcing Manager from Australia Jan 24, 2026
★★★★★
"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Feedthrough meets all ISO standards."
Technical Specifications Verified
P Procurement Specialist from Singapore Jan 21, 2026
★★★★☆
"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Feedthrough arrived with full certification. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Germany Jan 18, 2026
★★★★★
"Great transparency on the Feedthrough components. Essential for our Machinery and Equipment Manufacturing supply chain."
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.”

14 sourcing managers are analyzing this specification now. Last inquiry for Feedthrough from Vietnam (34m ago).

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Frequently Asked Questions

What materials are commonly used for feedthroughs in vacuum applications?

Common materials include Stainless Steel (304, 316 grades), Copper for conductivity, Alumina Ceramic for insulation, Glass for viewports, and Viton (FKM) for sealing applications.

What are the main components of a vacuum feedthrough?

A typical feedthrough consists of three main components: the Conductor/Penetrator (carries signal or fluid), the Flange (provides vacuum-tight mounting), and the Insulator/Seal (maintains vacuum integrity while isolating components).

How do I select the right feedthrough for my machinery application?

Consider your vacuum level, temperature range, media type (electrical, fluid, mechanical), material compatibility with your process, flange size/type, and required certifications for your industry application.

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 Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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