Connection Port (Flange): Temperature Range -20°C to 150°C

Q: What are the main types of flange connections for vacuum gauges?

The main types are KF (Quick Flange), ISO (International Standard), CF (ConFlat), and ANSI flanges, each designed for specific pressure ranges and applications.

Q: How do I ensure a proper seal on a vacuum gauge flange?

Use the correct gasket material (elastomer O-rings for medium vacuum, metal gaskets for high/ultra-high vacuum), ensure clean sealing surfaces, apply proper torque to fasteners in a cross pattern, and verify with leak testing.

Q: Can different flange types be interconnected?

Yes, using appropriate adapters, but this may affect system performance. It's best to maintain consistent flange types throughout the vacuum system for optimal reliability.

Component Specifications

Definition

A precision-engineered flange component designed specifically for vacuum gauge installation, featuring standardized dimensions and sealing surfaces to ensure leak-tight connections in vacuum systems. It serves as the interface between the vacuum gauge sensor and the vacuum chamber or piping system, maintaining system integrity under varying pressure conditions from atmospheric to ultra-high vacuum levels.

Working Principle

The flange connection port operates by providing a flat, machined sealing surface that mates with a corresponding flange on the vacuum system. When compressed with appropriate fasteners and sealing elements (such as O-rings or metal gaskets), it creates a vacuum-tight seal that prevents air ingress and maintains the required vacuum level for accurate pressure measurement.

Materials

Stainless steel (typically 304 or 316 grade), aluminum alloys (for lightweight applications), or specialized vacuum-compatible materials with low outgassing properties. Surface finish: Ra ≤ 0.8 μm for optimal sealing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Leak Rate	< 1×10^-9 mbar·L/s
Port Size	DN 16 to DN 160
Flange Type	KF, ISO, CF, or ANSI
Sealing Method	O-ring, metal gasket, or elastomer
Surface Finish	Ra 0.4-0.8 μm
Pressure Rating	10^-9 to 10^3 mbar
Temperature Range	-20°C to 150°C

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

Standards

ISO 2861, DIN 28403, ISO 1609

Parent Products

This component is used in the following industrial products

Vacuum Gauges

Vacuum gauges are precision measurement devices that monitor and quantify the degree of vacuum (pressure below atmospheric) within a vacuum pumping system.

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Engineering Analysis

Risks & Mitigation

Improper sealing leading to vacuum leaks
Material incompatibility causing contamination
Over-torquing damaging flange surfaces
Thermal cycling compromising seal integrity

FMEA Triads

Trigger: Insufficient fastener torque
Failure: Vacuum leak exceeding allowable rate
Mitigation: Implement torque-controlled installation procedures and regular leak testing

Trigger: Contaminated sealing surfaces
Failure: Poor seal formation and particle generation
Mitigation: Establish cleaning protocols and inspection requirements before assembly

Trigger: Material outgassing
Failure: Increased system pressure and measurement inaccuracy
Mitigation: Use certified vacuum-compatible materials with low outgassing rates

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm on critical dimensions, flatness within 0.05 mm over sealing surface

Test Method

Helium leak detection per ASTM E493, pressure decay testing, visual inspection of sealing surfaces

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Connection Port (Flange)

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Frequently Asked Questions

What are the main types of flange connections for vacuum gauges?