Venturi style steam trap
Venturi style steam trap
(OP)
We are considering using a steam trap that utilizes an ISO standard venturi nozzle to remove the condensate from the steam system. It has no moving parts and appears to be very energy efficient. Our testing shows that it works well under varying loads (above 15% of rated max load). The venturi design should not be confused with orifice traps; I have experimented with orifice traps and was disappointed by their performance under varying loads. We have tested the veturi design rigorously on a weighted condensate test rig and have found it to work well under varying loads. Can anyone (other than steam trap manufacturers) provide me with their experiences using venturi (NOT ORIFICE) steam traps?





RE: Venturi style steam trap
Unless I have completely misinterpreted what you are trying to do
RE: Venturi style steam trap
1) No moving parts to fail
2) As the condensate forms and travels through the throat of the venturi nozzle, the pressure head of the condensate is transferred to velocity, causing the pressure of the saturated condensate to drop, which in turn causes the fluid to flash back into steam. During the flashing process, the fluid volume expands several hundred times, eliminating the available flow path for escaping steam. The result is a highly efficient condensate removal device under varying condensate loads.
3) The nozzle is very efficient at moving condensate and very inefficient at moving steam due to sonic choking. The result is minimal steam loss even at loads under 15%. The result is the inability to "fail open" as other condensate removal devices do. I hope this clarifies.
Any practical info from users would be helpful.
RE: Venturi style steam trap
http://artisanind.com/library/index.htm
RE: Venturi style steam trap
Do you have a reference to a web site where we can learn more about them? From the lack of relevant comments here it seems that not many know about these things.
You said specifically that you were not interested in experiences with orifice steam traps, but on the off-chance that you mean you are not interested in single orifice traps here is a reference to some comments I posted on my experience with stepped orifices some time back
thread391-117776
RE: Venturi style steam trap