Engineering editorial · Updated 2026-09-18
The short answer
Dry-run protection detects or responds to loss of liquid. Its availability and behavior must be confirmed for each model.
What to check
Ask how detection works, how quickly it acts and whether restart is automatic. Validate the response using the approved test procedure.
Make the comparison meaningful
Record supply voltage, medium temperature, circuit arrangement and the measurement location. Compare candidate pumps under the same conditions. Maximum flow, maximum pressure and a single noise value do not describe a complete working point.
Before you choose a model
Ask for the current specification, performance curve and approved operating limits for the exact variant. Agree on the test method and acceptance criteria, then validate a sample in your equipment. This guide describes selection principles, not verified performance for a Shan Neng model.