KF-40 hose adapters connect flexible vacuum hose to a KF-40 (NW40) flange, most often to run a vacuum pump hose to a KF manifold, chamber or instrument. LoCo Science carries two styles: hose barb adapters from 3/8" to 1" and PVC smooth hose adapters in 3/4", 1", 1.25" and 1.5". Both are turned from solid 304 stainless steel bar with no welds.
Which KF-40 hose adapter do I need?
- Connect vacuum hose: Use a hose barb adapter that matches the hose's inside diameter: 3/8", 1/2", 5/8", 3/4" or 1". Our silicone vacuum tubing fits our hose barbs.
- Connect PVC hose with a smooth fit: Use a PVC smooth hose adapter, 3/4", 1", 1.25" or 1.5", sized to the hose's inside diameter.
- Secure the hose: Add a hose clamp over the barb or smooth adapter.
- Connect the flange side: One KF-40 clamp and centering ring set.
Frequently asked questions
What is the difference between a hose barb and a smooth hose adapter?
A hose barb has ridges that grip the inside of the hose. A smooth adapter has a plain outer surface sized for PVC hose.
Which size KF-40 hose adapter do I need?
Match the adapter to your hose's inside diameter.
Do I need a hose clamp?
Yes, we recommend one. A hose clamp over the barb or smooth adapter keeps the hose secure.
