Hi
I the latest Jet International on page 15, there is a valve from Festo where you can shut off a flow with an extra pilot input.
It very useful I some of my projects there I have no looking on the landing gear. But I cant find it on Festos website. In the paper they call it M5-Q5-4 but that's probable not correct .
Is there some one out there know the right name on it.

Best regards
Jonas