Help! PVC gate valve open

[Bossanova]

I’m plumbing my first tank, and setting up a Herbie overflow. I had to take my gate valve apart to reseat the o-ring and fix a leak, but I may have loosened the wrong nut and now it won’t close!

Can anyone help a noob to plumbing? I know that if I loosen the nut for the handle I can then adjust it somehow...

If I turn the handle fully clockwise it’s open. Turning it fully counterclockwise is open wide

 

[Crabs McJones]

Not sure what you mean, can you take a pic of the unit?

 

[Chuk]

Are you going more than 1 turn? Gate valves take a bunch of turns to go full closed

 

[Bossanova]

Fixed it! Opened it all up again and the “wafer” was in there sideways.