Suspect it could be debris from construction or due to the valve arrangement (horizontal pipe, valve body in horizontal plane) the paddle could be catching on its guide. Need to confirm this.
Valve has only been installed upto 18 months ago, unsure of previous operation but surprised if seat is...
I have a 700mm gate valve that is not sealing for whatever reason and would like to know of a method or company that can put a camera inside a main while under pressure to inspect the valve gate/seat and possible jet or remove debris.
Many options have been looked at but the main condition is...
