Purging condensate in a vacuum line

[nbog]

If someone has experince with draining condensate from a vacuum line, I would appreciate any hint/help:
Pilot-plant:

I have a line under vacuum (2" Hg). Gas mixture (containig solid particles) contains water which condenses during the start-up (until the whole line gets hot). I was thinking about putting u-tube so the condensate will overflow as it bulds-up and then shut it off when the system gets hot. However, I might go with higher vacuum in the future experiments so the U-tube would have to be far below the line to prevent water in it to be sucked up.

Question is: Is the U-tube good idea at all or someone has better solution?


Thanks,
Nik

 

[Fzob]

I have drained steam condensate from vacuum systems by installing a vacuum rated vessel 32+ feet above the drain point on a pipe with a trap on the bottom. It works fine.

At 2" Hg you will only need to have about 2.5' of water column. This should be easily done with a pipe trap.

 

[nbog]

Thanks Fzob,

Nick

 

[StoneCold]

If it is a small project just put in a drop leg with two valves. Then use the valves as an airlock to transfer the water out of the pipe.

Regards
StoneCold