But yeah, it's a 3/2 solenoid valve (working here in the normally open position).
It has parts filled and is in-cased in epoxy resin which prevents leaking.
I was going to have a another go at this with a similar design this winter but that never really happened.
The main problem I have encountered with using these solenoid valves is the low flow for re-filling the chamber after the shot (piloting is fine).
