Standardization of Industrial Fluid Filtration Terminology and Specifications

What have you learned over the years? Since you come from the tech side, one would think you would already know the answer.

And the term filter is so broad as to be almost useless.

I'd reconnect with my technical side.

Your questions are "odd" at best, sounding more like job interview questions than anything else.

Specifications and Regulations - Camfil

How to Determine Air Filter Specifications | Universal Air Filter

Procurement Guideline - National Air Filtration Association

Air Filters (industrial) Specifications | IHS Engineering360

Filter Specifications and Efficiencies: Fundamental Changes ...

Your post troubles me!

Why would you want to "establish provable standards for liquid filtration media"? when there are already known and testable standards available worldwide.

I suspect that you will also find there are other criteria that have nothing to do with the particle size. (Like the ash content for scientific filter media or "neutrality" for those used in water analysis.)

Why remove particles before a filter? Probably because there is some history of those particles damaging the filter media.

We have a few filter sets of varoious performance. Sand filters, settling beds, filter papers for laboratory work, membrane filters and even some vortex devices. Each has a specific task to perform. Some are expected to provide 100% exclusion or particles to size "x", while others are only expected to remove 95%.

My advice if you are heading up a sales force is to tell them all the following.

First ask the customer "What do you want?" then LISTEN!

And then listen some more!

And after that,consult with the designers to confirmthat they can deliver that expectation.

You will have happy customers and happy support staff.

Partial reply: Depth filtration: how is it impacted by various devices?

Depth filtration depends on many things and devices to effect it. High velocity will disturb the accumulated retained materials which will force it further into the filter media. This reduces the available filtering openings thus reducing the flow through the filter media. As the pores become clogged the effective pore size is reduced since many of the larger pores are clogged and fewer large pores are available.

Turbulence in the flow such as from a pump, especially from a pulsating pump, will disturb more of the accumulated solids and force them deeper into the filter media. This can begin the clogging of the filter media.

Greater depth of the filter media reduces the flow of solids getting through the filter media but also increases the flow from the greater available contact area. It also decreases filter flow rates due to the increase in the number of particles being separated and caking.

Two good resources of information are MILLIPORE http://www.emdmillipore.com/US/en/life-science-research/chromatography-sample-preparation/filtration-products/O3Wb.qB.CnUAAAFBw_plvzI_,nav?cid=BI-XX-BSP-P-GOOG-ASP0-B343-1010

and PALL http://www.pall.com/main/food-and-beverage/product.page?id=46837

Good Luck, Old Salt