Push/Pull solenoid on a switch or a solenoid valve?
I have an air supply and, thanks to iceng, a rapidly pulstating (variable speed) 12v Dc power.
I would like the air supply to allow through a set amount of air each time. I already have a mechanical switch that works perfectly, allowing the exact amount of air through, I need this air switch to be opening and closing as quickly as possible. Would I be better of using a push solenoid and setting it up with the switch or do you think I will obtain faster speeds using a dedicated solenoid valve?
I was looking a this solenoid. (or something like it http://www.ebay.co.uk/itm/Solenoid-Push-Pull-Small-/321714577205?hash=item4ae7aedf35)
Though i am not sure about the valve version.
Any advice/recommended solenoid (valve or push-pull) would be very helpful.
4mm pipe (ext diameter) 2mm (int diameter)
(preferably have the solenoids as small as possible)