Pumps, sized to the chemistry — not the catalog page

A mag-drive centrifugal pump relies on the pumped liquid to lubricate and cool its internal bushings — losing that liquid can generate rapid heat damage within seconds. Finish Thompson's M20 power monitor watches the pump's actual electrical load pattern and detects the drop in hydraulic load before motor current rises enough to trip a standard overload relay, catching dry running, deadheading, and magnet decoupling that a standard relay misses.

A sealless mag-drive pump eliminates the mechanical-seal leak path, which is the single largest failure point in a traditionally sealed pump. It doesn't eliminate every failure mode — mag-drive pumps have a different failure profile (dry running, cavitation, magnet decoupling) that needs its own protection strategy, not the assumption that sealless means leak-proof under every condition.

No — it depends on the specific bushing design. Richter's MNK series, for example, uses SAFEGLIDE PLUS dry-running-optimized plain bearings (pure SSiC or SSiC/SAFEGLIDE PLUS) specifically engineered for that condition. Dry-run tolerance should never be assumed from the pump category alone; it has to be verified for the specific model.

Flow and pressure are only two inputs in the Zero-Guesswork Specification Framework's Hydraulic gate — the real operating envelope also includes NPSH (available and required), suction condition (flooded vs. lift), operating turndown, and minimum-flow requirement. Equipment gets selected for the full system operating envelope, not because a catalog maximum happens to clear the target flow.