Valve Section
AssemblyFour top-action piston valves (rotary on many European instruments); the fourth valve corrects the sharp 1+3 combination and extends the low range. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Valve Section
8 top-level lines as of r177458| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Piston Valve | tuba-piston | 4× | 4 | · | part |
| 2 | Valve Casing | tuba-valve-casing | 4× | 4 | · | part |
| 3 | Finger Button | tuba-finger-button | 4× | 4 | · | part |
| 4 | Valve Guide | tuba-valve-guide | 4× | 4 | · | part |
| 5 | Coil Spring | coil-spring | 4× | 4 | · | part |
| 6 | Valve Felt | tuba-valve-felt | 8× | 8 | · | part |
| 7 | Valve Top Cap | tuba-top-cap | 4× | 4 | · | part |
| 8 | Valve Bottom Cap | tuba-bottom-cap | 4× | 4 | · | part |