📄 Technical Data Sheet – STF Irrigation Filters

1. Inline Mini Filter (STF–Inline)

• Type: Compact disc/cartridge screen filter

• Connection Sizes: ½″, ¾″, 1″ (Y‑Y type connections)

• Flow Rate: 4–25 m³/h depending on size STF+8STF+8STF+8STF+5stf-filters.netlify.app+5pdf.agriexpo.online+5

• Filtering Accuracy: 130 µm (disk cartridge)

• Max Pressure: 8 bar

• Temp Range: 0–60 °C

• Materials: UV‑resistant polypropylene body; resistant to acids/fertilizers stf-filters.com+6STF+6STF+6pdf.agriexpo.online

• Dimensions (example 1″): Ø 184×166.7 mm; weight ~0.31 kg STF

2. Manual Screen Filter (STF–MS)

• Type: Manual-clean stainless/plastic screen filter

• Sizes: 2″, 3″, 4″, 6″

• Flow Rate: Up to 100 m³/h

• Filtering Area: Up to 3160 cm²

• Max Pressure: 10 bar

• Temp Range: Up to 60 °C; pH 4–11 Reddit+12stf-filters.netlify.app+12stf-filters.com+12

• Materials: Stainless lid/screen; reinforced polyamide body stf-filters.netlify.app+1stf-filters.com+1

3. Self-Cleaning Screen Filter (STF–FMA Series)

• Type: Electric (or hydraulic) self-cleaning screen filter (vertical design)

• Filtration Range: 74–1000 µm

• Screen Area: Up to 4950 cm²

• Pressure Range: 2–10 bar

• Fluid Temp: Up to 50 °C stf-filters.com+1stf-filters.netlify.app+1

• Materials: AISI‑304/316 stainless steel; epoxy‑polyester coating

• Control: Electric-driven, auto backflush via pressure or timer stf-filters.com+12stf-filters.com+12stf-filters.netlify.app+12

4. Manual Disc Filter (STF–MD)

• Type: Manual-clean disc/cyclonic filter

• Sizes: 2″, 3″, 4″

• Flow Rate: Up to 100 m³/h

• Filtration: 100–400 µm; filtration area 1200–3400 cm²

• Max Pressure: 10 bar

• Materials: Polypropylene body; polyamide discs; stainless steel lid stf-filters.com+2stf-filters.com+2stf-filters.netlify.app+2

📊 Summary Table

🛠 Application & Recommendations

• Inline Mini: Ideal for small drip systems or point-of-use filtration.

• Manual MS/MD: Suitable for general irrigation lines—easy tool-free maintenance.

• Self-Cleaning FMA: Best for intensive, large-scale operations requiring continuous flow and automatic flushing

• ⚙️ How an STF Irrigation Filter Works

  🔹 1. Water Inlet

  Water enters the filter through the inlet connection, carrying suspended particles such as sand, silt, algae, and organic matter.

  🔹 2. Filtration Process

  Depending on the filter type:

  ✅ Screen Filters

  • Water passes through a stainless steel or plastic mesh screen.

  • Fine particles are trapped on the surface of the screen, while clean water exits through the outlet.

  ✅ Disc Filters

  • Water flows through a stack of grooved plastic discs compressed together.

  • Dirt is trapped between the disc grooves as water flows through.

  ✅ Sand/Media Filters

  • Water flows downward through a bed of granular media (usually sand or gravel).

  • Suspended particles are captured within the media bed.

  ✅ Hydrocyclone Filters

  • Water enters tangentially and spins rapidly.

  • Centrifugal force causes heavier particles (sand) to settle in a collection chamber at the bottom.

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  🔹 3. Clean Water Outlet

  Filtered (clean) water exits the filter through the outlet port, ready to flow into the irrigation system — drip lines, sprinklers, or pipes.

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  🔄 4. Cleaning Process

  🧼 Manual Filters

  • The screen or discs are manually removed and rinsed with water when pressure drop is noticed or flow decreases.

  🔁 Automatic/Self-Cleaning Filters

  • Equipped with a differential pressure sensor or timer.

  • When the filter is dirty, a backflush cycle is triggered automatically:

    • A small portion of clean water flows in reverse.

    • Debris is flushed out through a drain valve, without interrupting the main flow.

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  🛡️ Why It’s Important

  • Prevents clogging of drippers and emitters.

  • Maintains consistent flow rates and irrigation efficiency.

  • Protects pumps, valves, and fertigation systems.

  • Increases lifespan of the entire irrigation network