Where to Find Small, Battery-Operated Air Valves for Arduino?

[Alexa_2012]

Hi guys, I am looking for a small and light air valve that can be activated by the arduino platform and can run on batteries. Once the valve gets the “go”signal it needs to switch (speed doesn’t matter) from a closed to an open position. The pressure to handle is low, i.e. <2 bar. It only needs to open once.
Any suggestions where I can find valves like this? Thanks for your help.
Alexa

 

[jehan60188]

any old solenoid valve should do the trick.

if(condition)
{pin 1 voltage = high;
wait 500 milliseconds;
pin 1 voltage = low;
}

or something like that, I'm not that familiar with arduino platform