You didn't mention the size of your lines, how much flow you need, or how you want to actuate the valve, all of which matter.
Either way check here:
http://www.clippard.com/products/dir...control-valves
I am making a very small air horn that will be feed by compressed air. I have a small space to work with no bigger than 14x30mm.
What are the type of Valves that I could look into using to regulate when the horn sounds?
You didn't mention the size of your lines, how much flow you need, or how you want to actuate the valve, all of which matter.
Either way check here:
http://www.clippard.com/products/dir...control-valves
Where is the air supply coming from? Most vehicle air horns simply stop/start the compressor with a common Cherry switch.
Then +1 to JB's comments.
Accuate and useful information will have you provided with accurate and useful information. We are all brilliant Engineers but clarivoyants we ain't.