Right material selection
Right material selection
(OP)
For transfer of Soldium Hypochlorite (12% solution) and FeCl3 (40% solution), which are the best material for the pump and its wetted parts including the Shaft. Some of the manufacturers are recommending Glass Fibre Reinforced Plastic....Shaft is of SS316..
The pumps are used to transfer the chemicals from bulk storage tank to the individual units day tanks.
Thanks to share your experience and preferably the suitable Pump manufacturers.
The pumps are used to transfer the chemicals from bulk storage tank to the individual units day tanks.
Thanks to share your experience and preferably the suitable Pump manufacturers.





RE: Right material selection
Some good chemical transfer pumps are shaftless MAGDRIVE style.
I have used the following pumps.
http://www.iwakiamerica.com/products/MD.htm
But there are others out there as well.
A GRP pump body would be okay but there are also a number of other pumps that are of a "plastic" body type.
Regards
Ashtree
"Any water can be made potable if you filter it through enough money"
RE: Right material selection
The Hypo has known material solutions, for metals people would use a 6%Mo superaustenitic or a Ni-Mo-Cr alloy. Non-metals would be preferred if the temp and pressure would allow it.
The ferric chloride is almost impossible to handle with metals, at a price that anyone would be able to swallow.
For both of these you also need to be careful about which plastics you use, some won't cut it.
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P.E. Metallurgy, Plymouth Tube
RE: Right material selection
RE: Right material selection
Plastic materials, or plastic-lined, are your only hope. Solid plastic materials would be OK with the hypochlorite too but it's strongly aklaline so stay away from glass-reinforced plastics. Iwaki, March and Little Giant all make small magdrives without any internal metallic components, which are widely used for ferric chloride, pickling solutions and other corrosives at low pressures and modest temperatures.
If you need the pump to be very mechanically robust or to go to higher pressures, numerous manufacturers are making ETFE or PFA-lined ductile iron magdrive centrifugals which work well and last for a long time if you never run them dry. We had particularly good luck with Innomag which I believe Flowserve or one of the other monsters bought, but Durco (also a Flowserve product),
All plastic/ceramic air diaphragm pumps are the option if you need to pump dry.
RE: Right material selection
I would simply avoid any metallic pump in this service.
RE: Right material selection
RE: Right material selection
Could you please share more information about glass-reinforced plastics, ETFE and PFA in chemical industry?
RE: Right material selection