Vacuum Components - CF Flange Reducer Nipples Technical Guide

CF Flange Reducer Nipples are high-performance vacuum fittings designed to connect pipes of different diameters in ultra-high vacuum (UHV) systems. Made from 304L/316L stainless steel, they offer exceptional vacuum compatibility and sealing performance, widely used in semiconductor manufacturing, scientific research, and aerospace applications.

Product Overview

CF Flange Reducer Nipples are essential vacuum components that combine ConFlat (CF) flange standards with diameter-reducing functionality. These precision-engineered fittings connect vacuum pipes or equipment of different sizes, ensuring leak-tight sealing and stable fluid transfer in ultra-high vacuum (UHV) environments. Their high-precision design makes them ideal for demanding applications in scientific research, semiconductor fabrication, and aerospace engineering.

Structure & Features

Design & Construction

CF Flange Section

Material: High-purity stainless steel (304L or 316L) for corrosion resistance

Key Features:

Ultra-flat sealing surface (≤0.5µm roughness)

Metal gasket sealing (Helicoflex or copper)

Compatible with 10⁻⁹ to 10⁻¹² mbar vacuum levels

Reducer Body Section

Material: Matched stainless steel for thermal stability

Key Features:

Smooth conical transition between different pipe diameters

Customizable size combinations

Key Advantages

Ultra-High Vacuum (UHV) Performance
 Metal-to-Metal Sealing (Leak Rate <1×10⁻¹⁰ mbar·l/s)
 Multiple Size Combinations
Thermal Expansion Compensation (Optional)
 High Mechanical Strength (Up to 10 bar)
Corrosion-Resistant Stainless Steel
Easy Installation with Standard CF Flanges
Maintenance-Free Long Service Life

Applications

Scientific Research

Particle accelerator vacuum chambers

Electron microscopes

Surface analysis systems (XPS, AES)

Nuclear fusion experiments

Semiconductor Industry

Vacuum deposition systems (PVD, CVD)

Plasma etchers

Molecular beam epitaxy (MBE)

Ion implantation machines

Aerospace & Defense

Satellite thermal vacuum testing

Spacecraft propulsion systems

Space telescope assembly

Rocket fuel system testing

Other High-Tech Fields

Synchrotron radiation facilities

Vacuum metallurgy

Medical vacuum systems

High-energy physics experiments

Technical Specifications

Notes:

Material: 304L / 316L stainless steel

Surface Finish: Ra ≤ 0.8 µm

Temperature Range: -270°C to +450°C

Custom Sizes & Lengths Available

CF Flange Reducer Nipples – FAQs

1: What’s the difference between CF reducer nipples and standard reducers?
CF Flange Reducer Nipples are designed for UHV systems with metal sealing, while standard reducers use elastomer gaskets and are for low/medium vacuum.

2: How do I select the right CF reducer nipple?
Consider: 1) Pipe diameters, 2) Operating pressure, 3) Space constraints. Our engineers can assist with selection.

3: What’s the maximum temperature rating?
Standard models withstand -270°C to +450°C. Special designs available for extreme conditions.

4: Installation tips for vacuum system components?
1：Clean sealing surfaces, 2：Use torque wrenches, 3： Avoid misalignment, 4：Perform leak tests.

5: Do these require maintenance?
Metal-sealed CF flanges are virtually maintenance-free. Periodic bolt checks are recommended.

6: Can I get custom semiconductor equipment fittings?
Yes! We provide custom sizes, materials, and surface finishes for specialized applications.

7: Are they corrosion-resistant?
Standard 304L/316L offers excellent resistance. For harsh environments, electropolished or coated versions are available.

8: How is leak testing performed?
Helium mass spectrometry (best) or pressure decay tests. Our standard leak rate: <1×10⁻¹⁰ mbar·l/s.

9: Does length affect vacuum coating system performance?
Longer reducers help with thermal expansion but may increase flow resistance. We optimize designs for balance.

10: Quality assurance for aerospace vacuum testing parts?
We supply: 1) Material certs, 2) Dimensional reports, 3) Leak test data. ISO 9001 certified manufacturing.

Conclusion

CF Flange Reducer Nipples are critical for high-precision vacuum systems, offering reliable sealing, flexible sizing, and long-term durability. Whether for semiconductor tools, research labs, or space applications, these components ensure optimal vacuum performance.