Posted 10/17/2020 17:28 (#8550494 - in reply to #8550485) Subject: RE: electric actuated knife gate valve.
I'm not sure where to buy one ready to go, but I built one by adding a 12V linear actuator to a manual gate valve. It took some fiddling with the internal limits to get the right stroke and I have springs built into the mount to get it seated properly.
Definitely not turn key though!
You might find some industrial surplus on ebay, but they're unlikely to be 12V, if that matters.