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Matching a tube with a sleeve

Busada pneumatic tubing consists of three major parts; the tube, the bend, and the sleeve. The tube is designated by Outer Diameter, and Wall, from the Wall we extrapolate the Inner Diameter. The Inner Diameter is crucial to the part being conveyed (it may be a canister, a cup, powder, pellets, caps, etc.)  Likewise, a bend's critical dimension is the Inner Diameter (we are not considering radius here). In order to connect a bend to a straight tube, one needs a coupling. The sleeve, however, has one critical dimension, and that is its Inner Diameter.

Recently I received a call from a customer who wanted to replace a PVC tube used for canister transfer. I received a picture and responded with a few questions. 

I needed the carrier to determine the needed Inner Diameter of the pneumatic tube. For that I would need the carrier, and she sent it to me. 



We were easily able to match the carrier to our transparent tubing, but we needed more; we needed the Outer Diameter of the Outlet Tube. From there we could fabricate a sleeve to connect our clear tubing to her carrier box.


In other words, we needed to make a sleeve with the ID of the sleeve = to OD the of the Outlet Tube and our Carrier tube. 

Here was our solution:


We used a 2" OD x 1.875" ID tube and, with a combination of two sleeves, capped it to a 2.625" cap. The length was 10"

Charles Busada - 04-Jul-2017


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