Instructions for using the filter media calculation utility

When you choose to buy a pressure filter tank to install by yourself, what type of filter material do you need to choose, how much is the quantity, and how should you calculate it?

Our Filter Material Calculator utility will help you solve those problems easily

What is filter media?

Filter media is the most important part of the filtration system to separate unwanted particles from the solution to be filtered. The type of media chosen to use in the filter tank depends on the quality of the input liquid and the quality requirements of the output liquid.

Types of filter media

In general, filter media are very diverse, each type plays a certain role in the filtration process. We list some common types of filter materials as follows to include in the worksheet:

Instructions for using the filter media calculation utility with images

Calculation utility interface:

Enter filter tank diameter (mm):
FRP filter tank model:

Average filter flow (for sand filter - 15m3/m2.h): m3/h

Filter media

Total height of filter media: mm

Media type Filter media height Unit Results Unit
Filter gravel mm kg
Filter sand mm kg
Anthracite coal mm kg
Activated carbon mm kg
Birm for removed iron mm kg
ODM for removed iron mm L
Softener resin mm L

Enter the input value

Step 1: Enter the diameter of the filter tank, the unit is mm. For example, if your filter tank is 900mm in diameter, you only need to enter the number 900 (this is also the utility’s default number).

  • The system will automatically suggest the corresponding filter tank model if the diameter range you enter corresponds to the FRP filter tank range.
  • The next line is the filter flow corresponding to the diameter you entered. Note that this flow applies to the pressure sand filter tank, the average filtration speed selected is 15m/h. If you use a filter to soften water, the filtration speed can be increased by 1.2-1.5 times, then the filtration flow will also increase correspondingly.

Step 2: Is the selection of filter media

Total height of filter media: That is, if you choose any type of filter media below, the total height of filter media poured into the filter tank will be shown here.

The height of the filter media depends on the height of the existing filter tank, but usually this height ranges from 600mm to 1800mm. To determine this height, you need to know how tall your filter tank is, then subtract 300mm to 600mm of space above from the tank mouth down to leave space for the media to expand when backwashing from the bottom up.

Step 3: Enter the thickness of the filter media layer you want to pour into the tank:

  • Support gravel: The support gravel layer needs to be poured 100-200mm above the bottom distributor of the tank to prevent other media above that are smaller in size from entering the filter slot. Normally in this box you enter 300-450
  • Filter sand: Normally you choose 300-1000 in this box, depending on the filter tank height you choose to pour many types of filter material or not. If only sand and gravel are filtered, the sand layer can be 800mm high or more
  • Anthracite coal: Normally you choose 300-500 in this box, depending on the filter tank height you choose to fill with a variety of filter materials or not. If only sand, coal and gravel are filtered, this coal layer can be 500mm or more high
  • Activated carbon: Normally you choose 600-1000 in this box, depending on the filter tank height you have. Activated carbon filter tank usually only contain support gravel and activated carbon to increase filtration efficiency, so the height of activated carbon can be selected to max.
  • Birm for iron removal: Normally you choose 200-900 in this box, depending on the filter tank height you choose to fill with many types of filter material or not and depends on the height of the filter tank you have.
  • Iron-reducing ODM granules: Normally you choose 200-600 in this box, depending on the filter tank heightyou choose to fill with a variety of filter materials or not and depends on the height of the filter column you have.
  • Softener resin: Usually you choose 800-2000 in this box, depending on  the filter tank height you have. Ion resin filter tank usually contain only gravel and ion resin beads or only contain ion resin beads to increase filtration efficiency, so the resin height can be selected to max.

Then the result will be as follows:

Filter media calculator -3

Filter media calculator -4
Filter media calculator 

If you have any questions about how to calculate filter media, please contact our Company’s Sales department for more detailed instructions.

Popular types of filter materials are provided by Song Phung Company

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