The damage of the bellow sealed globe valves is not due to use in the production process, on the contrary, it is damaged due to mechanical squeezing.
Although the bellows of the bellow sealed globe valve have different elasticity grades, different coatings, and different PTFE guard plates, all bellow sealed globe valves have invisible wear from the outside corrosion and particle adhesion.
Therefore, in order to avoid the aseptic process production being forced to stop due to the damage of the diaphragm valve, in practice, the bellows is usually replaced before the specified service life. As a result, whether it is the number of bellows that are forced to be replaced, the maintenance costs caused by this, or the downtime of the equipment, they are significantly more than the PTFE bellows valve.
