INDUSTRY COMPONENT

Door Flange

Door flange is a precision-machined sealing interface component for vacuum chamber doors, ensuring hermetic isolation and structural integrity in industrial vacuum systems.

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Component Specifications

Definition
A door flange is a critical sealing component in vacuum sealed door systems, typically consisting of a flat, machined metal ring with precisely drilled bolt holes and a sealing groove. It serves as the mating surface between the vacuum chamber door and the chamber body, creating a vacuum-tight seal when compressed with a gasket or O-ring. The flange must maintain dimensional stability under vacuum pressure differentials and thermal cycling while providing a reliable mechanical connection.
Working Principle
The door flange operates on the principle of compressive sealing. When the vacuum door is closed, bolts apply uniform pressure to compress an elastomeric or metal gasket within the flange's sealing groove. This compression creates a hermetic barrier that prevents air ingress, maintaining the required vacuum level inside the chamber. The flange's flatness and surface finish ensure even pressure distribution across the entire sealing surface.
Materials
Stainless steel (typically 304 or 316 grade) for corrosion resistance and vacuum compatibility; Aluminum alloys (6061-T6) for lightweight applications; Occasionally titanium for specialized high-temperature or corrosive environments.
Technical Parameters
  • Seal Type O-ring or flat gasket
  • Flange Type KF, ISO, or CF
  • Vacuum Rating 10^-9 to 10^-6 mbar
  • Surface Finish Ra ≤ 0.8 μm
  • Pressure Rating Atmospheric to ultra-high vacuum
  • Temperature Range -40°C to +200°C
  • Flatness Tolerance ≤ 0.05 mm
  • Bolt Circle Diameter Standardized per vacuum flange standards
Standards
ISO 2861, ISO 1609, DIN 28403, DIN 28404

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Door Flange.

vacuum door flange sealing flange vacuum chamber component industrial flange hermetic seal vacuum technology ISO flange standards Door Flange Door Flange in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Vacuum Sealed Door

A specialized door designed to maintain vacuum integrity in pressure vessels and chambers.

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Engineering Analysis

Risks & Mitigation
  • Seal failure leading to vacuum loss
  • Surface corrosion compromising seal integrity
  • Thermal expansion causing bolt stress
  • Improper bolt torque causing uneven compression
FMEA Triads
Trigger: Insufficient bolt torque during installation
Failure: Uneven gasket compression leading to vacuum leaks
Mitigation: Implement calibrated torque wrench procedures and sequential bolt tightening patterns
Trigger: Surface contamination or damage on sealing face
Failure: Compromised seal integrity and vacuum degradation
Mitigation: Regular inspection protocols and proper cleaning procedures before assembly

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1 mm on critical dimensions, flatness within 0.05 mm over entire surface
Test Method
Helium leak detection (mass spectrometry) with sensitivity of 10^-9 mbar·l/s, pressure decay testing, and visual inspection of sealing surfaces

Buyer Feedback

★★★★☆ 4.9 / 5.0 (10 reviews)

"Found 52+ suppliers for Door Flange on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Door Flange is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Door Flange so far."

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Frequently Asked Questions

What is the difference between KF and ISO flange types?

KF (Klein Flange) uses a clamp and O-ring system for quick connections in medium vacuum applications, while ISO flanges use bolted connections with metal gaskets for high and ultra-high vacuum systems requiring superior sealing performance.

How often should door flange seals be replaced?

Elastomeric O-rings typically require replacement every 6-12 months depending on usage frequency and vacuum cycling, while metal gaskets can last several years but must be inspected for deformation during each maintenance cycle.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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