PBH Bag Filter Housing Sizing Guide

Sizing guide for PBH Bag Filter Housing and BP & BN Series Filter Bags

  This sizing guide provides information for the initial sizing and selection of PBH Bag Filter Housing and BP & BN Series filter Bags.

Where to use?

Use PBH bag filter for particle removal. PBH bag filter for prefiltration.
Removal of coarse and fine particles Prefiltration
PBH bag filter for the protection of fine filters. PBH bag filters can be used for straining applications.
Protection of fine filters (e.g. fine filter cartridges) Straining applications
PBH bag filters make the idea; CNC machine coolant filter. Choose Siga for food & beverage filtration.
CNC machine coolant Food & beverage

Which filter bag material to use?  

Considerations to make when choosing the best filter bag material.
Polypropylene felt is the ideal bag filter material. Nylon mesh can be a suitable bag filter material.
Polypropylene felt for general reduction of particulates. Available micron ratings 1, 5, 10, 25, 50, 100, 200 Nylon mesh for removing particulates of a specific size or straining applications. Available micron ratings 50, 100, 200, 400, 600

Typical water flow rates:

Please see the information below comparing filter size against flow rate.

Filter size

Flow rate

PBH Size 10 Housing 50 lpm (3 m3/h)
PBH Size 20 Housing 100 lpm (6 m3/h)
* With 25 micron PP felt bags * * Please note that flow rates may vary depending on application – i.e. dirt load, viscosity, micron rating etc.

What is the micron rating of various particles?

A micron is a unit of measure and equals one thousandth of a millimetre.
  • 1mm = 1000 microns (micrometer)
  • 1 inch = 24,500 microns (imcrometer)


Micron Rating

Paint pigments 0.1 – 5 micron
Corn starch 0.1 – 10 micron
Face powder 0.1 – 30 micron
Bacteria (Pharmaceutical applications) 0.2 micron
Bacteria (Food applications, beer) 0.45 or 0.65 micron
Fine clay 0.5 – 1 micron
Copier toner 0.5 – 15 micron
Coal dust 1 – 100 micron
Yeast (food applications, beer) 3 – 40 micron (average)
Silt, fine 8 – 13 micron
Silt, coarse 37 micron
Coffee 5 – 400 micron
Ginger 25 – 40 micron
Sand, very fine 60 micron
Sand, fine 125 – 250 micron
Beach sand 500 – 700 micron
Coffee, espresso 200 – 500 micron


The information in this guide is accurate to the best of our knowledge and provided for preliminary selection. It is your responsibility to determine if additional testing or information is required and if this product is fit for a particular purpose. Siga Filtration will not be responsible for any damages resulting from the use of this information.



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