Rod over bend is a old design of heating elements and one can get maximum efficiency in this design as its 95% area of element is open for radiation
Available in both grades Kanthal and NiCr
ROB elements can take maximum surface load than any other design of elements. Rod over bend means its thicker wire design so can go for higher element temperature and gets better life. there is always gap between two elements for expansion
The element is very easy to install, its maintenance friendly Very less breakdown time while
Selection of wire is very important job in this . Pitch and loop height of element design also very important