KF Flexible Bellows | Vacuum Bellow Hose | Helium Leak Tested | KF16–KF50 | Custom Lengths

stainless steel KF/NW flexible bellows designed for vacuum systems. Available in KF16, KF25, KF40, and KF50 sizes with a vacuum range down to 1×10⁻8 Torr. Hose thickness from 0.15mm to 0.3mm, lengths from 100mm to 3000mm, fully customizable. Helium leak tested for reliable vacuum integrity. Ideal for semiconductor, high-purity gas, and vacuum equipment applications.

SizeHose Thickness (mm)ID (mm)OD (mm)D (mm)l (mm)Standard Length (mm)
KF160.15 or 0.220313012.7100 – 3000
KF250.15 or 0.225.236.54012.7100 – 3000
KF400.15 or 0.238.2565512.7100 – 3000
KF500.15 or 0.250.266.57512.7100 – 3000
KF630.265868725100 – 3000
KF800.28010011425100 – 3000
KF1000.210012513425100 – 3000

ISO-KF components are assembled by inserting a centering ring between the two flange faces and securing the assembly with a flange clamp, providing a reliable vacuum seal with quick, tool-free installation.


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Material

SS304, SS316L

Size

KF16, KF25, KF40, KF50, KF63, KF80, KF100

Length (mm)

100, 150, 200, 250, 300, 400, 500, 750, 800, 1000, 1200, 1500, 1800, 2000, 2500, 3000

Country of Origin

China

Connection Type

ISO-KF Vacuum Flange

Leak Test

Helium Leak Tested

Working Pressure

Vacuum to Atmospheric Pressure

Vacuum Range

≥ 1 × 10⁻⁸ Torr

Application

Vacuum Systems, Semiconductor Equipment, High-Purity Gas Lines

Customization

Available

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