No. You are probably thinking of a float type of trap. In a steam trap the valve closes when the float falls. In an air vent the valve opens when the float falls. There is some possibility that it might work if you mount the trap upside down.
in my opinion, you can use float trap because the concepts with steam and air is same... just make sure the financial cost imapacts in company.. or the availability of material.
If you use a float type trap to flush out liquids, beware of liquids that may condense in the vapor leg of the float trap, which is what will happen on this external vapor side leg which will cool down against ambient air on the outside. Once the vapor leg floods up with liquid, the float wont work.