Filter Pot Midi
Key Information
The BSP Filter Pot MIDI is a high-capacity side stream filtration and dosing unit engineered to protect large commercial and industrial heating and cooling systems from the damaging effects of magnetite, suspended solids, bacteria and entrained air. Suitable for closed-loop systems up to 375,000 litres, the Filter Pot MIDI combines magnetic filtration, ultra-fine particulate removal, passive deaeration and chemical dosing within a robust stainless steel package.
Designed in accordance with BSRIA BG29 and BG50 guidance, the Filter Pot MIDI continuously removes both magnetic and non-magnetic debris from circulating system water, helping to maintain system cleanliness, improve energy efficiency and extend the operational lifespan of boilers, chillers, pumps and critical plant equipment.
The unit incorporates six high-strength 8,500 Gauss neodymium magnet bars alongside BSP’s Anti-Microbial and Bio-Degradable polypropylene cartridge filters, available in 50, 20, 5 and 0.5 micron filtration ratings. The silver ion impregnated filter media actively inhibits bacterial growth and biofouling, while the enhanced biodegradable filtration media significantly reduces environmental impact compared to conventional cartridge filters.
Manufactured from durable 304 and 316 stainless steel components and generally designed to PD5500 standards, the Filter Pot MIDI is built for long-term reliability, simple servicing and minimal maintenance disruption. The integrated 24 litre dosing pot allows safe introduction of water treatment chemicals without shutting down the system, while the automatic air vent continuously removes microbubbles and trapped air to reduce noise, corrosion and component stress.
Its intelligent internal design ensures unrestricted system performance, even during extended servicing intervals, making the Filter Pot MIDI an ideal solution for maintaining water quality and system efficiency in larger HVAC installations.
Features
- Design pressure: (Bar G): FV/16
- Suitable for system volumes up to: 375,000 Litres
- Flow rate through the vessel: 0.08 L/sec to 4.34 L/sec
- Temperature range (Magnet Only): 0°C – 100°C
- Temperature range (Heating Systems): 0°C – 90°C
- Filtration rate: Down to 0.5 micron
- Dirty flow inlet connection: DN65 – 2 1/2″ BSP male
- Clean return outlet connection: DN65 – 2 1/2″ BSP female
- Dosing capacity: 24 Litres
- Filter body mounting: Wall mounted
- Designed to: Generally to PD5500
- Automatic Air Vent: 110°C / 16 Bar Max Working Pressure
Materials of Construction
- Vessel Body: 304 Stainless Steel (PED Sep 2014/68/EU – Fluid Group 2 Compliant)
- Magnets x 6No: Neodymium Rare Earth
- Cartridge Filter: Polypropylene Melt Blown Anti-Microbial + Bio-Degradable Spun Bonded Fibre
- Isolation Valves, NRV and fittings: 304 Stainless Steel
- Automatic Air Vent: 304 Stainless Steel
Further Information
| Feature | Description |
|---|---|
| Compliance | Fully compliant with BSRIA guidelines BG29 and BG50 for side stream filtration, chemical dosing, corrosion inhibitor treatment, magnetic filtration, passive deaeration, fill water pre-treatment, solids removal and filtration, bacteria and bio-fouling inhibition, CPD dynamic filling, maintenance and inspection, dynamic flushing procedure and on-line cleaning. Cartridge Filters tested to ASTM E-2149 and ASTM G-29. |
| Magnetic Filter | Removes magnetic system debris before reaching the Cartridge Filter below, helps to increase the lifespan of the boiler, chiller and cooling system components, reduces carbon emissions, increases fuel efficiency and increases the lifespan of the Cartridge Filter. |
| Anti-Microbial & Bio- Degradable Polypropylene Cartridge Filter |
BSP’s Anti-Microbial Spun Cartridge Filters remove both magnetic and nonmagnetic system debris, available in 50, 20, 5 and 0.5 micron filtration rates, ensures coalescence micro-bubble formation on the surface of the Filter and surpasses BSRIA guidance for filtration rates. These Cartridge Filters are typically used in instances when the water has a heavy degree of particles. BSP Cartridge Filters can catch and hold a large volume of particles before they become clogged. The Polypropylene filtration media is impregnated with Silver Ions and a new preparatory ingredient which increases the bio-degradable breakdown of the filtration media by 250 times (3 years from 750 years). The Silver Ions block the bacterial respiratory system of bacteria thereby destroying the energy production of the cell, leading to the bursting of the cell membrane and neutralising of the bacteria. Max working temperature is 90°C. |
| BSP Stainless Steel Automatic Air Vent | Ensures the system micro-bubbles and air are emitted from the system, helps reduce noisy pipework and decreases stress on system components. |
| 24L Dosing Pot Capacity | Enables installers and maintenance personnel to quickly and safely dose the system with water treatment chemicals. |
| DN65 – 2 1/2″ BSP Dirty Flow and Clean return Connections | Suitable for LTHW heating and cooling water systems up to 375,000 Litres in system volume. |
| DN15 – 1/2″ BSP System Fill and Drain Connections |
Using the System Fill feature with the BSP Anti-Microbial 0.5micron Cartridge Filter reduces the possibility of bacteria, dirt and debris entering the system. Further, the fill feature can also be used to add larger volumes of inhibitor when an external pump is required for dosing. The dedicated DN15 – 1/2” Drain Connection ensures the system water is drained from the vessel during filter cleaning, leading to faster filter replacement time. |
| 6No 8,500 Gauss Neodymium Magnet Bars | Each magnet is fully encased in a 304SS shell, easily removable from the 316SS Magnet Grate for cleaning and fully submerged into the system water flow path for increased filtration. |
| Installation | Complete with 2No backing plates for simple installation to wall or frame (8 x M12 holes) |
| Servicing | The cleaning of the filters can be simply achieved without the need to shut the main system down and the dosing of water treatment chemicals is achieved safely and effectively, again without the need to shut the system down. |
| Unblockable System | Even if the filters are never serviced the ingenious design ensures that the filter will not inhibit system performance. |
| Stainless Steel Components | All components are manufactured from 304SS or 316SS for easy cleaning and servicing of the the filter. |
| Pressure / Temperature Gauge | A 0-16 Bar pressure and 0-120°C Temperature Gauge is included on the front of the vessel to give extra reassurance that the vessel is empty and safe to open and remove the lid before cleaning the filters. |
| Polished Inner Surface of Vessel | The inner surface of the Vessel is highly polished to remove any crevices. Metal ‘eating’ bacteria habitate crevices within pipework. |
| Full Bore Flat Face Isolation Valves | The 304SS isolation valves do not restrict system flow and increases the ease of installation. |
| Bespoke Insulation Jacket | The bespoke insulation jacket ensures heat loss is minimised. |
| Warranty | 10 years from date of first installation. |
104/0879 Filter Pot Midi Datasheet 
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