Vacuum powder discharge valve
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Dear experts, the drying tank uses vacuum drying; the material is a powder with a particle size of around 50 microns. The discharge valve is a ball valve, and it often happens that after discharging the material the valve closes, resulting in a decrease in vacuum level. I would appreciate any recommendations for a better valve
Damage to the sealing ring causes the ball valve to not seal properly; it is recommended to clean the valve regularly. Removable valves are recommended.
Is there a problem with the way the valve is installed? It is best to install it vertically, and the material delivery pipeline needs to be pneumatically driven.
Thank you. It is installed vertically; there are no pipes at the valve outlet, and a receiving box is placed below the valve to collect the fluid
Is it because the seal isn’t tight enough that the vacuum level isn’t high enough?
What is the caliber? What is the pressure rating?
-0.7MPa DN100
For this valve, you should take a look at my coaxial valve. Ball valves experience this issue due to structural reasons, and it has nothing to do with quality; any valve with a rotating angular stroke mechanism will have this problem. Powder will inevitably enter the sealing surface, cause wear, and then lead to leakage.