Cylinder Life

Detailed Explanation

In an electrode humidifier current flows through the water, and minerals in the boiling water build up in the cylinder. As deposits cover the electrode surface it becomes harder for the unit to reach capacity, and the cylinder is replaced. The main factors setting the replacement interval are water conductivity and hardness, annual operating hours, draining and foam control.

Below the conductivity band (including RO/DI water) an electrode unit cannot reach capacity or will not run; above it, frequent draining, foaming and rapid build-up occur.

Why It Matters

A cylinder replacement means consumables, labour and a period without humidification, so it is a significant item in an electrode unit's operating cost. In a resistive unit it is replaced by steam-tank cleaning planned around water quality.

Engineering Note

• Before unit selection, the feed-water analysis (conductivity, hardness, chloride, silica, alkalinity) is reviewed. • If RO/DI water is to be used, the electrode type is unsuitable; a resistive unit (Neptronic SKE4) or, where boiler steam is available, a steam-to-steam unit (Neptronic SKS4) is selected. • Softened water lowers hardness but does not change conductivity significantly. • Modulating control and correct drain settings limit mineral build-up in both technologies.

NKT Application Link

For this application NKT – Nem Kontrol Teknolojileri supplies the Neptronic SKE4 resistive steam humidifier and the Neptronic SKS4 steam-to-steam humidifier. NKT – Nem Kontrol Teknolojileri does not supply electrode humidifiers. Unit-selection support is based on space conditions, humidification load and the feed-water analysis; technical service and spare parts are provided. Design, installation and commissioning remain with the facility's designer and contractor.