gate valve

I’m looking to replace my water main’s gate, and the “screw” or reverse treaded rod. The old rod snapped and the gate is closed, unable to open. This is the valve that comes from my meter and supplies the whole house. If I can’t replace just the “guts” of the valve I’ll have to hire a plumber to...

How can I tell if these water mater valves are gate valves or the other kind with the washer and seat? Also do gate valve go bad or do they just need to be repacked? Thanks, Artie.