Design 8 note of the bellows stop valve

Design 8 points of attention for the bellows stop valve
1. The gap between the bellows and the valve stem is generally 1~2mm.
2. The bellows cannot withstand the torque. The design should ensure that the bellows only stretch and compress.
3. When the bellows valve is opened or closed, the bellows are in a compressed and stretched state.
4. The bellows shall have the minimum layer thickness necessary to withstand the pressure and shall be tested.
5, pay attention to the compatibility of materials, practice has proved that inconel alloy is a good material for bellows high temperature and high pressure resistance.
6. The welding quality of the bellows should have process evaluation and welding records.
7. As a bellows valve for throttling, the influence of the flow rate on the bellows should be considered.
8. The bellows has a certain rigidity, and the increase of the operating torque caused by the bellows stretching or compression should be considered.