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Maximum Velocities for Pnuematic Conveying

Maximum Velocities for Pnuematic Conveying

Maximum Velocities for Pnuematic Conveying

(OP)
Dear all:

I am designing a new dilute phase vacuum pnuematic conveying system which will utilize some existing transport piping.  One of the objectives for the new design is to improve the system capacity.  I am, however, concerned about causing excessive wear in the existing piping system due to the increased transport velocities.

Therefore, I am searching for any available info on maximum recommended air velocities for these types of systems. Can anyone provide some guidance based on past experience or suggest a good reference to consult?     
 

RE: Maximum Velocities for Pnuematic Conveying

Depends on the abrasive nature of the product conveyed, which you haven't specified...

RE: Maximum Velocities for Pnuematic Conveying

(OP)
I had figured as much.  The product conveyed is tobacco dust (not particularly abrasive). It is not atypical to convey this material at 6000-6500 FPM with no major issues but the systems I'm familiar with run intermittently.  This application is a housekeeping vac system so even though the solids loading is light, it will run continously. Therefore, I want to be cautious about exceeding the above range.      

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