AFX Peristaltic Pump hose failures

[PieterDen]

We have a high rate of failures on 150mm Peristaltic pump hoses, we are pumping Cupper concentrate with a 1.85SG.
Is there maybe somebody that have experience on these pumps, if so I would like to discuss and share more information.

 

[3DDave]

Pump hoses made of what material? What qualifies as a failure? How long between failures? How old are the hoses? How fast is the pump operating? What does the pump maker say about the failure? Who makes the pump? Are all the other parts of the pump in good condition? Are the rollers turning freely or does this use shoes? What have you tried in diagnosing this problem? How high is the pressure being generated? What is the inlet pressure? How does the life of the hose compare to what the maker suggest it would be?

 

[PieterDen]

I am conducting a RCFA this afternoon to get answers. Will share with you.

 

[FACS]

What is Cupper Concentrate?

Maybe a typo for Copper?

Pump hoses made of what material?

Add to this the chemical compatibility of the hose and your concentrate.

 

[ashtree]

Peristaltic hose failure are usually related to a couple of items.

1) The hose is incompatible with the material being pumped- Not common but this does happen.
2) Excessive discharge pressure- Trying to pump against too high of head, which means that the pressure in the hose in front of the roller is above the hose operating pressure.
3) The hose material is incorrect for peristaltic operation- This is common. Peristaltic hose seems very expensive and people will try to substitute with other materials that will work for a short time.
4) Excessive or very high rotation speed of the rotating rollers. This happens when a small pump is being run hard to achieve a certain dose. The peristaltic hose only has a certain number of flexes in its life and if you are running hard that number can be achieved in a short amount of time.

Excessive crush of the hose can be a problem in some pumps too, but this will often cause a jam. Not all pumps have crush adjustment.

You do not define what time frame your failures are in as that may or may not actually be excessive. Hope this information helps.

Regards
Ashtree
"Any water can be made potable if you filter it through enough money"