Blog
Diaphragm Failure #5 - What Has Caused This Issue??
As far as diaphragm failures are concerned, there are a number of failure types. Different types of failures are caused by different problems.
Regarding the diaphragm rupture in the photo below, what has caused this problem?
Scroll Down For Answer
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
Answer: Undertorque
This diaphragm's outer edge will be pulled from the pump's casings due to the fact that proper torque was not applied to the liquid chamber's bolts. The diaphragm, once removed from the pump, will appear to be "out of round" and oval in shape. One should see the outer lines on the airside of the diaphragm as uniform around and at one point they will travel off the diaphragm - indicating the area of pull.
As a measure against this problem, it is highly remcommended to check the torque, - and retighten it if necessary, - before using the pump. When it comes to plastic pumps (e.g. PP, PVDF or PTFE), in particular, the torque can be loosened easily during long-term storage and transportation.
Contact us for more information about YAMADA AODD pumps.