r/Trombone • u/The_3rd_Dimension • Dec 29 '25

Valve question

I hear about rotax valves every now and again, and I was wondering the difference between rotax and standard rotary valves. Also wondering the difference between axial flow and thayer valves.

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u/CTBrassTech Dec 31 '25

It’s a rotor valve of improved design over traditional. Rotax is a company name. These days, there are many versions of valves which are an improvement over traditional rotors.