8 replies to this topic

[Satis M]

Hello,

 

I would like to know the viscosity correction factor in the strainer mesh delta P calculation.

 

Most vendors provide values for viscosity 25cP next value for 100cP. I am trying to find delta P for 64cP, 9 gpm, 1.2 SG fluid across 400 mesh.Any leads ?

 

Regards, Satis.

[fallah]

Satis,

 

Normally most vendors of the strainers have the tables of pressure drop correction factor for various viscosities. It might the correction factor for desired viscosity be obtained by interpolation between two adjacent viscosities. But selected vendor can submit the best solution for this query...

[Satis M]

Mr. Fallah,

 

I have gone through the tables and charts and calculation methods provided by vendors. But I would like to get the backup  of the viscosity correction factor chart. Are these correction factors are empirical or calculated ?

 

Regards,

 

Satis.

[fallah]

 Are these correction factors are empirical or calculated ?

 .

 

Satis,

 

IMO, those correction factors are to be founded through empirical methods...

[sukanta87]

Hi Satis,

 

The below one is for gas filter but you may get an idea for your strainer DP

https://www.dropbox....jpuzqt60/DP.png

 

For accuracy contact the vendor.

[latexman]

Personally, I don't worry too much about accuracy of strainer dP, because I allow 10X this dP for the dirty condition.  So, use the 100 cP value to get close enough, 10X it, and move on.  That usually works for most strainer application.  Is this one special?

[Shivshankar]

Hi,

 

Here is link, may be useful.

 

http://seperationtec...-and-strainers/

[Satis M]

Thanks, Sukanta, latexman, shivshankar.

 

My problem is in cusp. the fluid I am handling is 64cP and 400mesh, to filter 40+ micron.

 

I have chosen 400mesh. With all approximation, extrapolation, etc. delta P is less than .5 bar at 70% clogging.

 

Is there anyway to find the delta P, mathematically. For perforated sheets, delta P can be calculated using Reynolds no, d'Arcy equation, no of holes etc. My vendor can't provide any calculation, for some reason.

[curious_cat]

Is there anyway to find the delta P, mathematically. For perforated sheets, delta P can be calculated using Reynolds no, d'Arcy equation, no of holes etc. My vendor can't provide any calculation, for some reason.

 

Look up a similar strainer from another vendor who does have a deltaP diagram. 

 

Even better, dump your vendor.