Ductile Iron Impeller or SS?
Ductile Iron Impeller or SS?
(OP)
In a few projects, I met the problem. Some bidders proposed duplex stainless steel CD4MCu for impellers while some other bidders proposed ductile iron impellers. The applications are for water with no or little solids. Normally the bids with CD4MCu is about 10% higher than the DI bids. I like the CD4MCu but could not justify the 10% extra cost.
What's your opinion and if any disadvantage of ductile iron impellers in water application?
What's your opinion and if any disadvantage of ductile iron impellers in water application?





RE: Ductile Iron Impeller or SS?
Guess the only advantage of CD4MCu is that in 100 years when the casing etc have been replaced 3 - 4 times you will still have a near new impeller.
Naresuan University
Phitsanulok
Thailand
RE: Ductile Iron Impeller or SS?
RE: Ductile Iron Impeller or SS?
RE: Ductile Iron Impeller or SS?
If your water is demineralized and is fully oxygeneated then the ductile and cast are unsuitable for the application. Nor are any of the "yellow" alloys.
RE: Ductile Iron Impeller or SS?
RE: Ductile Iron Impeller or SS?
But your question was - to compare ductile iron with CD4MCu which has been done.
Naresuan University
Phitsanulok
Thailand