Freshwater Generator / Watermaker · Freshwater Generators
Donghwa Entec DF-20 — Fresh Water Generation for Marine/Industrial. As a Shell-and-Tube Heat Exchanger, it is normally installed in an engine-room cooling, heating, condensing, feedwater or process circuit according to the listed duty. In that role, its primary purpose is to transfer heat between two fluid streams while keeping the media separated, or to condition feedwater in a heat-transfer vessel. Shell-and-tube units differ from plate exchangers through their tube bundle and shell construction, and special deaerators or air heaters add process functions beyond simple liquid-to-liquid cooling. For exact ratings, dimensions, settings, capacities, materials and variant-specific limits, refer to the manufacturer documentation for the exact figure.
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Source: komarine.com · not checked against a manufacturer datasheet
What our service work and the manufacturer documentation say about keeping this model running.
Surveyors check distillate quality via the salinometer and dump valve function, vacuum integrity, and the condition of the plate packs and gaskets. Plates should be opened and descaled at intervals suited to feed water and operating hours, with pumps, ejector and instrumentation tested.
Keep a full set of plate gaskets, spare titanium plates where practical, pump mechanical seals, a salinity sensor and dump valve parts, and ejector nozzle components. Carry descaling chemicals and spare gauges for vacuum and temperature.
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