Solenoid Cold Trap for Thermal Vacuum Chamber.

[{XtremeDry}]

Anybody here can explain to me the function of solenoid cold trap for thermal vacuum chamber. I heard the explanation from the mechanical guy in my company; however, i can't fully understand its function and figure out how it really works. What is its part in the chamber?
Thanks.

 

[cowboybob]

Welcome to ETO, {Xtremely}!

... explain to me the function of solenoid cold trap for thermal vacuum chamber...

I'm going to assume the term "solenoid" is a control term, rather than a specific type of cold trap.

A "cold trap" is a passive device used to remove moisture from a gaseous sample. For instance, to remove water vapor from a sample of air (in your example, the air being removed from the vacuum chamber), thereby "drying" the air.

Typical "cold trap":

A gaseous sample, injected on the right, passes through a trap chamber (which is immersed in, for example, ice, dry ice or liquid nitrogen) where a condensate collects on the inside walls of the trap and then a more dry (less "wet") gaseous sample leaves from the left.

There a many, many uses for cold traps.

As for the term"solenoid"; it is probably referring to a device that opens and/or closes a valve controlling the gaseous flow..

 

[KeepItSimpleStupid]

There are cold traps for vacuum diffusion pumps which are thermal. Without the cold trap the pump would not work. Usually these are cooled by LN2 or other system.