On 18 May 2006 14:26:36 -0700, jim rozen
wrote:

In article pUTag.26663$QP4.22271@fed1read12, Steve B says...

I want to get a valve that is opened and closed instantly by an electric
current.

These don't exist. All solenoid valves currently on the market
take some time to open, about a half a second. You need to
look into a negative causality valve, which will stop your
dog from barking before it's actuated.

Jim
I have one of those Jim. It worked so well I didn't even get the dog.
Eric