Media Filter Selector
Water filter sizing for irrigation and process systems
Screen, media and disc filters with the right backwash and flux rates. Built for irrigation and process technicians.
A worked example
Amiad Metal 4 × 48″
AFM activated glass · Grade 1
These figures come from the Tenselo engine. Every result Tenselo produces shows the inputs it used and the method behind it, so the work can be checked rather than taken on trust.
Inputs
Flow
90 m³/h
Media
AFM glass
Velocity
Auto
Mode
Auto select
Results
4 × 48″
Vessels
20 m/h
Filtration velocity
4.5 m²
Bed area
22.5 m³/h
Per vessel
39.5 m³/h
Backwash
95 %
> 1 micron
Why it matters on the job
Vessel count, not guesswork
Bed area and velocity matched to flow — named to real filter ranges.
Backwash that works
Backwash flow and timing sized so the bed actually cleans.
Screen, media or disc
The right technology for your water and your particle load.
FIL-008 · manual model verification
Amiad Sigma Pro screen filter at 55 m³/h
Can one specified 4-inch Sigma Pro cover a 55 m³/h irrigation duty? This worked example checks the model at 130 microns, with average surface water and 3 bar available pressure.
Design questionDoes one 4-inch unit cover the stated flow and cleaning conditions?
Source waterDam or open surface supplySilt and light algae · average water classification
Specified filterAmiad Sigma Pro 4-inch6,000 cm² effective screen area · 130-micron duty
Design flow55 m³/h to the irrigation main15.28 L/s
Calculated check: one unit covers this stated duty. FIL-008 reports the selected 4-inch model at 54% loading and keeps the 1.95 m/s connection velocity below its 3.0 m/s check.
Verified inputs and checks
- Filtration grade
- 130 µm
- Available pressure
- 3.0 bar
- Minimum flush check
- ≥ 2.0 bar
- Number of units
- 1 specified
This static worked example was verified in the live Tenselo FIL-008 calculator on 15 September 2026. Calculator execution and project PDF reports require authorised application access.
Water filter sizing for irrigation and process duties
Tenselo's filtration calculators help designers work through flow, water quality, filtration rating and cleaning requirements. Select the tool that matches the proposed filter type, then check the result against the emitter, process and manufacturer's requirements.
Screen, disc or media filtration?
FIL-008 Screen Filter Selector and FIL-002 Disc Filter Selector use flow, water quality and micron rating to assess the filter arrangement and flushing requirements. FIL-007 Media Filter Selector covers media, vessels and backwash for the entered duty.
The catalogue also includes bag filtration, hydrocyclone and sand-separator sizing, pressure-vessel selection and air-scour blower sizing. These tools address different equipment and operating conditions.
Allow for backwash as well as service flow
Check the available pressure, the water required for cleaning and where backwash water will go. FIL-005 Filter Backwash Flow & Volume assesses backwash flow, volume and wash-water storage for a media filter. A filter that meets the service duty still needs workable cleaning arrangements.
Interpret the water test before choosing treatment
A screen or disc filter's particle rating does not answer every water-quality question. Use water analysis interpretation to review the supplied laboratory results and missing tests, then the water-treatment selection guide to assess the preliminary process sequence. Return to the relevant sizing guide once the treatment duty is defined.
Domestic filtration and water treatment
For a whole-house or single-tap system, start with domestic water filtration. For softener sizing, iron removal, reverse osmosis or ultrafiltration, use the water-treatment tools and the supplied water analysis.
The 55 m3/h screen-filter sample report shows a worked example with its assumptions and limitations. It is a static example, not a live filter selector. New accounts require approval; see account access and availability.
What is in this category
8 Filtration — Ag & Process calculators
Every calculator in this category, by its reference code. Running them requires an approved Tenselo account with access to the relevant calculators.
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FIL-001 Bag Filtration
Bag filter sizing - bags, vessels & flow vs blockage
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FIL-002 Disc Filter Selector
Flow + water quality + microns -> disc units & flush
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FIL-003 Filter / Pressure-Vessel Selector
Standard FRP mineral-tank pick for a media or resin bed
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FIL-004 Filter Air Scour Blower
Air flow and blower duty for air-scour of a media filter
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FIL-005 Filter Backwash Flow & Volume
Backwash flow, water volume and a wash-water tank for a media filter
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FIL-006 Hydrocyclone / Sand Separator
Centrifugal sand separator: indicative size by flow + clean pressure loss + separation guidance (confirm on datasheet)
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FIL-007 Media Filter Selector
Flow + pressure + microns -> media, vessels, backwash & build
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FIL-008 Screen Filter Selector
Flow + water quality + microns -> screen area, models & flush
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