KF bellows are flexible 304 stainless steel vacuum hoses with a KF flange on each end. They connect pumps, chambers and fittings that don't line up exactly, and reduce vibration between a pump and the rest of the system. LoCo Science carries bellows in KF-16, KF-25 and KF-40 from 100 mm to 2500 mm, and KF-50 from 100 mm to 1000 mm, measured flange to flange. Each one is helium leak tested for maximum performance.
Which KF bellows do I need?
- Find your flange size: Measure the outside diameter of your flange and compare it to our KF flange size chart, or check the size marked on your equipment.
- Bridge a short gap or small misalignment: 100 mm or 300 mm.
- Make a longer run: 500 mm, 1000 mm or 2500 mm (KF-50 up to 1000 mm).
- Connect each end: One clamp and centering ring set of the same size per end, so two per bellows.
Frequently asked questions
Are LoCo's KF bellows leak tested?
Yes. Every LoCo bellows is helium leak tested.
How are KF bellows measured?
Flange to flange.
How many clamps does a KF bellows need?
Two, one for each end. Every LoCo KF clamp is sold as a set with one centering ring.
