# Thread: HELP PVC grain pneumatic conveying system vaccum

ok sir thanks..

how i can calculate the k-factor practically?
By calculating your system and varying the K-Factor in that calculation until the calculation results match the operational data.

The derived K-factor is then the basis for calculating the modified installation.

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sorry sir i dont get your point could you more explain

that an example of the system that i want to study

Going back to your original question:

I have a problem concern extanding piping installation of an already installed PVC grain pneumatic conveying system (vaccum) my question are :
Q1: how can i calculate the maximum distance (of piping) that my vaccum pump can handle to transport pvc grain from the pickup point to the hopper?
Q2:how can i calculate the pickup velocity of the pvc grain ?
if someone could give me thhe steps that i should follow to solve this problem?
Thanks
First:
Recalculate your existing installation according to the article written by A.T. Agarwal.
From that calculation, you know the corresponding K-Factor for your product.

Second:
Calculate your extended installation according to the article written by A.T. Agarwal.
In this calculation, use the corresponding K-Factor for your product, as calculated for the existing installation

What you then actually do is using the existing installation as a reference for the extended installation.

Take care
Teus

in the article i found the equation attached in the picture

k=f(deltaPs,deltaPg,W,ρg)

HHO.png

if this equation that i should use to calculate K could you explain how i could practicly from the installation calculate the pressure drop due to solid flow and pressure drop due to gas flow and gas velocity

Indeed, the formula, shown in the picture, is from Mr. Agarwal’s article.

You can kindly ask Mr. Agarwal on this forum for his article and the calculation spreadsheet for pressure- and vacuum conveying.

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