Vapor lock
Vapor lock
(OP)
My vertical can pump (centrifugal) cannot pump the light end condensate from the HPKO drum which pressure is ambient to the Condensate Surge Drum (P = 270 psig). Firstly, I think it might occur from lower S.G. from the designed value (S.G. = 0.65) which will effect in insufficient of head due to system curve lift. But yesterday I try to test and found that condensate lever in HPKO durm not decrease. So I take the sample of the condensate to the lab and found that S.G. = 0.66. The discharge pressure gauge is 300 psig which is enough for the condensate to go through the system to CSD. And while testing the pump, there's no cavitation noise. Then I try to bleed the line if there's any gas/vapor on the discharge side, but the condensate came out. I take that condensate to test at the lab and got S.G. = 0.66 which I think is the same one as in the HPKO drum ( not coincedent). Now I'm focusing on vaporlock but I'm not sure if this can be the cause.
Hope anyone can help.
Hope anyone can help.





RE: Vapor lock
RE: Vapor lock
Mike Halloran
Pembroke Pines, FL, USA
RE: Vapor lock
If this is my misunderstood please educated me.
RE: Vapor lock
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Vapor lock
Compare it with ... well, what it should be at the OP.
Mike Halloran
Pembroke Pines, FL, USA
RE: Vapor lock
You mention pump discharge pressure gauge is 300 PSI and the pump is not delivering. I would assume this is also equal to shut off condition. The pump will be boiling if you do not have a recirculation line.
You only have about 20PSI difference between pump shut of pressure and the discharge vessel pressure + the static head pressure.
Condensate with 0.66 SG is very unlike to have a VP lower than atmospheric.
RE: Vapor lock
The real point is that MikeHalloran has an excellent suggestion for your situation.
Regards,
SNORGY.