Just tried searching the verc for this but as you can imagine the results are pretty useless when searching for the word "valve"

Does anyone remember/know how to create a door that opens a certain amount depending how much you turn a valve? i remember there being several in the single player halflife, some even closed slowly if you stopped turning the valve.

The valve you're describing is a func_rot_button, when creating one don't forget the origin brush btw. I'm kind of rusty on the specific use of it, but I think if you create one and give it the door as a target it will automaticly make it open and close according to what you're doing with the func_rot_button ingame

thanks Kouji I'll give it a shot

Dang it didnt work - the door only opens after the full rotation of the valve. Basciallly its the same as a button which ends up rotating, you don't even have to hold "e" , once it starts rotating it just goes.
I'll have to do some mor experimenting

Heh, it seems I was mistaken.

The func_rot_button is simply that. A button that rotates to a certain degree and then activate it's target. what you need are these two entities: momentary_rot_button and momentary_door