7 replies to this topic

[rikakose]

Is Multi-layers filter bag available?

 

It is a filter bag with different mesh size layers, e.g. first layer 20micron , second layer 10 micron, third layer 5 micron.

 

Is there something like this availabe in the market?

 

 

 

[thorium90]

When someone says a mesh filter, there is a nominal rating attached to it. This rating is typically in microns. This rating implies the typical average pore size from the pore size distribution. I doubt you can find any filter with multiple layers of different ratings, simply because the manufacturing process gives a range of sizes anyway... Manufacturers will always strive to make the pore size distribution as narrow as possible, but realistically, there will never be only one pore size in the entire filter area. It will always be a range centered around the nominal rating.

Edited by thorium90, 05 June 2018 - 05:01 AM.

[rikakose]

When someone says a mesh filter, there is a nominal rating attached to it. This rating is typically in microns. This rating implies the typical average pore size from the pore size distribution. I doubt you can find any filter with multiple layers of different ratings, simply because the manufacturing process gives a range of sizes anyway... Manufacturers will always strive to make the pore size distribution as narrow as possible, but realistically, there will never be only one pore size in the entire filter area. It will always be a range centered around the nominal rating.

 

Now we are using two filters in seriers to filtrate the impurities. If there is only one with size 10 micron, the product is off spec. If 2 micron is installed, it has to be replaced in no more than half day..... 

[thorium90]

Why is there a need to filter the fluid? Is it because a downstream equipment has a certain maximum impurity size? In that case, what is the filtration requirement? You mention product. Is this the product of the filter or some actual valued product with commercial value?

Can you give some information on what this fluid is? Gas, liquid, waste oil, waste water....

What is the filter you are currently using to filter this fluid? Filter bag?

[Saml]

Seem that you are looking for something similar to the Eaton LOFCLEAR 500, that has a prefilter in it to stop bigger particles.

Other manufacturers may have something similar.

[breizh]

Hi ,

You may also consider to use pressure leaf filter with filter aid . Unclear what you want to filter ( liquid , gas) ?

Lack of information leads to improper answer.

note :

- Company like CUNO is offering a variety of filters and cartridges , you may consult them .

You may also find filter where you can clean the screen ( AZO Self cleaning filter is an example )

 

My 2 cents

Breizh

Edited by breizh, 06 June 2018 - 05:27 AM.

[rikakose]

Thanks for the info.

 

The fluid going through the filter is oil with small amount of the Crystals, solids (catalyst), rust. The oil is the product to the market. So that is very valuable. The purity has to be very high.

[thorium90]

What flow rates are we talking about? 1m3/hr? 10000m3/hr?

 

You mention that if you use 2micron filter bags it will choke very quickly, it is clear that you have exceeded filtration critical flux with the 2micron filter bags.

Since the solids load and characteristic will be the same and the filtration requirement is 2micron, then I suggest you increase the filtration area to bring down the flux rate.

I would think pleated high surface area cartridge filters will probably be more suitable for you in these conditions than low surface area filter bags.