This article introduces the API 610 pump‑type selection matrix, comparing OH1‑OH6 overhung and BB1‑BB5 between‑bearings pump configurations. It covers duty‑based selection logic, typical application scenarios, key updates of the 13th edition, common tender‑document mistakes and practical FAQs for process‑pump specification.

API 685 is the only standard within the API system specifically governing seal‑less centrifugal pumps. Its current edition is the 3rd Edition, July 2022. It covers two categories: magnetic‑drive pumps and canned‑motor pumps.

Teffiko recognizes that chemical pumps are equipment with high energy consumption in chemical production. Many factory pumps operate far from the best‑efficiency point for long periods, with flow regulated by valve throttling, resulting in substantial waste of electric energy. The losses of chemical pumps mainly fall into three categories: hydraulic loss, volumetric loss and pipeline leakage loss. Energy‑saving retrofitting requires systematic implementation covering selection, maintenance, components, speed regulation, pipelines, operation and maintenance, so as to achieve stable energy consumption reduction and mitigate faults such as cavitation and seal failure.