O-ring Expansion

[jmjmjmjm]

Good Day,

i have a problem regarding the O - ring of our Transfer Pump of Spent Caustic unit. the O - ring expanded that caused to break the Mechanical Seal of the said Pump. the o - ring material was EP( Ethylene Propylene) and i checked that the chemical components of the spent caustic is compatible to the said material of the O - Ring. any other factor that may be the caused of o - ring expansion.

thank you and have a nice day.

 

[MikeHalloran]

You began by asserting a causality, then asserted that the causality is unlikely.

You did not include even a single number, dimension, product identifier, photograph, nothing.

I will get back to you when my Vulcan Remote Mind Melding machine gets back from the repair shop.


Mike Halloran
Pembroke Pines, FL, USA

 

[micalbrch]

Mike, you find more info in the "material engineering other topics" (double posting).....

 

[hydtools]

Fluid compatibility does not mean that the seal material will not swell/expand when exposed to the fluid. The gland size may not be permitting the o-ring to swell without overfilling the gland resulting in destructive seal pressure due to restricted seal volume change.
Apparently the o-ring needs more space into which to expand.

Ted