Steam trap pressure drop
Steam trap pressure drop
(OP)
Hello:
I have an exchanger using steam as a heating medium. Steam pressure inside the exchanger is 600# psig. Steam trap outlet goes to a drum 300 feet away operating at 70 psig. Does it mean that the pressure drop is consumed by the trap or by the line and exit losses.
I am designing a PSV for the drum considering a case of fail open steam trap. The trap condensate line is 3". If I use the Cv value for a 3" open gate, is it reasonable that I get a steam load for the PSV?
Thanks for your replies in advance.
Kamakkal
I have an exchanger using steam as a heating medium. Steam pressure inside the exchanger is 600# psig. Steam trap outlet goes to a drum 300 feet away operating at 70 psig. Does it mean that the pressure drop is consumed by the trap or by the line and exit losses.
I am designing a PSV for the drum considering a case of fail open steam trap. The trap condensate line is 3". If I use the Cv value for a 3" open gate, is it reasonable that I get a steam load for the PSV?
Thanks for your replies in advance.
Kamakkal





RE: Steam trap pressure drop
rgs
RE: Steam trap pressure drop
Regards
RE: Steam trap pressure drop
I believe you would be being unnecessarily conservative if you regard the trap as a 3" gate valve. As the others have said, get the actual orifice size or its Cv from the trap supplier and use that in your calculation. I wouldn't be surprised if taking the trap as a gate valve resulted in a PSV of double the capacity that would really be required.
Katmar Software
Engineering & Risk Analysis Software
http://katmarsoftware.com
RE: Steam trap pressure drop
Doug