Pumping Sodium Hypochlorite
Pumping Sodium Hypochlorite
(OP)
Just a quick survey of peoples thinking:
Pumping low concentration Sodium Hypochlorite at ambient temperatures, the material corrosion charts shows Polypropylene to be quite suitable, however, long term you get lots of brittleness at sharp corners in components such as pump casings etc.
Our preferred option is either ETFE or PFA lined, but we regularly come up against Polypropylene which is also much cheaper.
My question to the pump users in this forum is when would you opt to use a known inferior material on such applications, would you simply add this to your routine maintenance lists to check pump robustness ?
Unfortunately cost savings are being driven more and more into Industry, and i'm guessing these decisions are all side effects to 'cutting costs'
Pumping low concentration Sodium Hypochlorite at ambient temperatures, the material corrosion charts shows Polypropylene to be quite suitable, however, long term you get lots of brittleness at sharp corners in components such as pump casings etc.
Our preferred option is either ETFE or PFA lined, but we regularly come up against Polypropylene which is also much cheaper.
My question to the pump users in this forum is when would you opt to use a known inferior material on such applications, would you simply add this to your routine maintenance lists to check pump robustness ?
Unfortunately cost savings are being driven more and more into Industry, and i'm guessing these decisions are all side effects to 'cutting costs'
Ash Fenn
www.cdrpumps.co.uk





RE: Pumping Sodium Hypochlorite
So, surround the pump with a sturdy barricade, properly support the pipes around it, and budget to replace it every N years, or when it develops cracks or other evidence of material degradation.
Mike Halloran
Pembroke Pines, FL, USA
RE: Pumping Sodium Hypochlorite
As a pump supplier (which you appear to be) that is a difficult recommendation to make. You do not know what type of plant system (spill containment, backup pumps, maintenance quality, etc.) that the pump will be part of. For example, if there are backup pumps, then breakdown of one pump is not a problem. Down the road, you would not want to be blamed for some problem that is out of your control.
I would survey other users and find some common ground among them.
RE: Pumping Sodium Hypochlorite
Ash Fenn
www.cdrpumps.co.uk
RE: Pumping Sodium Hypochlorite
Instead say 'perfectly satisfactory for a limited time', or something like that.
Mike Halloran
Pembroke Pines, FL, USA
RE: Pumping Sodium Hypochlorite
RE: Pumping Sodium Hypochlorite
But your post made me chuckle to myself - commercial suicide !!
Ash Fenn
www.cdrpumps.co.uk
RE: Pumping Sodium Hypochlorite