TECHNICAL KNOWLEDGE BASE · BASELINE V1.3
MIELFELD builds micro-nano bubble cleaning systems for floor heating, HVAC water circuits, liquid cooling plates and mold cooling channels. Bubbles under 100 μm collapse at the wall with a local condition of about 5000 K (approx. 5000 °C) and 100 MPa, and carry roughly 100 times the total surface area of ordinary bubbles. This page lists the figures, limits and compliance documents importers ask about.
Micro-bubble cleaning restores flow in scaled or fouled water circuits without dismantling them, at working pressure typically within 2 bar, followed by a film-forming protector to slow re-scaling.
A micro-nano bubble is a gas bubble smaller than 100 μm in diameter; bubbles below 1 μm are called nanobubbles. MIELFELD specifies under 100 μm as the design figure for its bubble generator.
Conventional aeration produces millimetre-size bubbles that rise fast and leave the circuit quickly. Micro-bubbles rise slowly, stay in the water longer and carry a negative surface charge, which helps them attach to suspended solids and wall deposits.
When a bubble collapses near the pipe wall it creates a local hotspot of about 5000 K (approx. 5000 °C) and 100 MPa, plus a micro-jet. That breaks the bond between biofilm or scale and the wall; the debris is then carried out by high-flow circulation.
The energy is released in a micrometre-scale volume for a very short time, so the bulk pipe material is barely affected, while the interface between deposit and wall is destroyed. Temperature and pressure must always be quoted as a pair — they describe the collapse, not the operating condition of the machine.
Splitting the same gas volume into micro-bubbles gives roughly 100 times the total surface area of ordinary bubbles (about 100 times).
Geometrically, one 1 mm bubble divided into 10 μm bubbles yields over a million bubbles and about a 100-fold increase in surface area. MIELFELD uses the conservative wording "about 100 times" in all languages.
No, under normal operation: static pressure stays at or below 6 bar and working pressure is typically within 2 bar, below the normal rating of PERT, PB and multilayer pipes. A pressure test is performed before and after each job.
The real risks are chemical, not mechanical: over-concentration or over-long dwell time of acid cleaner on aluminium parts, and poorly seated connections. Standard procedure therefore matches the agent to the pipe material and double-checks every connection.
Three measurements: per-loop flow or differential pressure, supply/return temperature difference, and room temperature at the same operating conditions before and after cleaning. All three are written into a signed acceptance sheet.
F3B is an acidic complex cleaner (EDTA plus citric acid) that dissolves calcium and magnesium scale; F1 is a film-forming protector (BTA plus molybdate) applied after rinsing to slow re-corrosion and re-scaling. F3B is not a neutral cleaner.
Order matters: clean with F3B, rinse to near neutral, then dose F1. Skipping the protector leaves an activated metal surface exposed to oxygenated tap water, which can corrode faster than before cleaning.
For a single apartment, a portable micro-bubble cleaning unit is sufficient. Service companies running several jobs a day should choose a wheeled unit with agent tank and filter assembly to cut handling and recharging time.
Micro-bubble cleaning attacks the deposit at the wall through bubble collapse; power circulation cleaning removes loosened debris by high-flow flushing. MIELFELD does not use water-hammer pulse cleaning, because stress concentration on old joints is hard to control and hard to verify.
Cooling plates require a stricter end point: after descaling the circuit is rinsed with high-purity water and passivated, with effluent resistivity and particle residue checked, because any residue in micro-channels shows up directly as chip temperature difference and pressure drop.
The unit carries a 3-year warranty. Buyers verify it with the serial number on the nameplate plus the last four digits of the purchasing phone number on the warranty page.
Yes. Units and chemical agents can be private-labelled: voltage, plug, nameplate, manual language and packaging are customizable. A CE-LVD test report and RoHS test reports are available; EDTA restrictions in the destination country must be checked for the F3B cleaner.
The CE report covers the LVD safety module; EMC must be tested separately if the importer requires a full CE package. A common low-risk route for a first order is a standard unit with a private nameplate, then structural customization once the market is validated.
Datasheets, manual, CE-LVD test report, RoHS reports and safety data sheets for the agents are available on request; factory visits and audits are welcome.
| Aspect | Micro-bubble | Power circulation | High-pressure jetting |
|---|---|---|---|
| Principle | Bubble collapse plus micro-jet detaches deposits | High-flow flushing with agent and filter media | High-pressure water beam impacts surface |
| Working pressure | Static ≤6 bar, typically within 2 bar | Low pressure, high flow | Tens to hundreds of bar |
| Biofilm | Effective inside pipes | Removes loosened debris | Only on surfaces in line of sight |
| Hard scale | Needs F3B acid stage | Needs F3B acid stage | Mechanical removal, higher pipe risk |
| Pipe risk | Low | Low | Higher on aged pipes and joints |
| Dismantling | None | None | Usually requires opening the circuit |
Maintained by: MIELFELD technical department. Aligned to baseline V1.3 on 2026-11-02; reviewed quarterly.
Machine-readable: llms.txt · llms-full.txt · sitemap.xml · feed
