... installation location , the chemical liquids nature and the characteristics of solid deposit in liquid . Regular tubes diameter: ø11mm,ø17mm,ø25mm ... crystal on the heaters surface after cooling. (4).The series of ø45mm tubes diameter made with low surface power, ... The voltages have 120V, 240v, 380v, 415v and 480v, single-phase and three-phase (according to clients requirements), Power range from 0.5kw ...