AFM filtration
AFM pool filtration: the Dryden Aqua system with Calplas filter and Besgo valve
AFM filtration is a pool filtration system that replaces sand with AFM, the activated filter media from Dryden Aqua. Q-Tech brings together filter, media, valve and mixer here for owners replacing the sand in their filter or planning a new plant room.
The Calplas filter is supplied without a valve included (according to Calplas): pair it with the Besgo 5-way valve or with the one you already have.
Models in this collection
| Model | What it is | Sizes | Key fact |
|---|---|---|---|
| Calplas AFM model filter | Reinforced polyester filter with a diffuser for AFM and sand | Ø 520 to 960 mm | 900 to 1000 mm filter bed |
| AFM and AFM® ng filter glass, 21 kg bag | Activated filter media | Grades 1 (0.4–0.8 mm), 2 (0.7–2.0 mm) and 3 (2.0–4.0 mm) | 21 kg takes up the same volume as 25 kg of sand |
| AFM® ng filter glass, 11 kg bag | Pre-mixed media for small filters | Mixed grade 0.4–1.2 mm | Grades 1 and 2 in a single bag |
| Besgo 5-way automatic valve | Automatic backwash valve | DN40 to DN125 (20 to 140 m³/h) | Returns to filtration if the power fails |
| ZPM static mixer | AISI 316L stainless steel mixer | DN40 to DN300 | Pressure loss below 0.1 bar |
Data according to Calplas, Dryden Aqua and Besgo.
How to choose AFM filtration
- The flow rate of your pool pump sets the filter diameter and the Besgo size; the FlowVis flow meter shows you that flow rate.
- For an existing filter, the media is all you need: 15% less AFM by weight than sand, according to Dryden Aqua (see Filter media and spares).
- The ZPM goes between the pool pump and the filter: according to Dryden Aqua, it acts on the zeta potential so that flocculation happens before the AFM.
- Ahead of the filter, the Hydrospin hydrocyclone pre-filter or the Hydrospin Compact halve the backwash water, according to AstralPool.
- The system is completed by the SPACE PRO IA (pH, Redox and free chlorine), No Phos against phosphates and the ACO stabiliser, free of cyanuric acid.
- Other options: Sand filters, Cartridge filters, High-capacity pool filters, Selector and automatic valves or Filtration accessories.
Applications
- Private pools switching from sand to AFM without modifying the filter.
- New plant rooms for private and community pools with a Calplas filter, Besgo valve and ZPM.
- Pools with Smart pool control.
Why buy AFM filtration from Q-Tech?
- Dryden Aqua technical support with an Expert Technician, on site or by phone.
- Filter, valve and mixer can be fitted in a pre-assembled plant room in our workshop (workshop pre-assembly): it arrives tested and ready to connect.
- Questions before you buy: technical call with an Expert Technician or WhatsApp.
Frequently asked questions
Can I put AFM in my existing sand filter?
Yes. According to Dryden Aqua, AFM® ng can be installed in any sand filter without modification.
Which AFM grade do I need?
It depends on the filter: for small ones, the pre-mixed 11 kg bag; for larger ones, the grades Dryden Aqua specifies for each diameter.
Does the ZPM need power or maintenance?
It needs no power: it is static, with no moving parts. It requires an earth connection and a yearly visual check.
See all Pool filtration or choose the complete AFM system here.
FP54·261112