Design for Viscous Liquid Substance

You can use a peristolic pump with probably tygon tubing.

http://www.fraingroup.com/sub_cat_Pump_109_-Peristolic_288.html

http://www.professionalplastics.com/TygonTubingProducts

http://www.professionalplastics.com/TYGON2075

Try different sizes of brass filters to get the purity you want. I would pump the stuff up to tank and let gravity flow thru the filter to a holding tank..

Dear Guest, Research the Tesla Fluid pump. It can handle liquids, gases, non-miscible materials, paints, fly-ash, even shear sensitive liquids.

Regards Dragon

Yes, the Tesla Fluid style would probably be an appropriate choice, see:

http://www.discflo.com/