One Piece Valve
The Global One Piece Kelly Valve is an alternative to the Two Piece Valve where working space is limited. The One Piece Kelly Valve construction eliminates the service connection that is used on the Two Piece Valve. One Piece Kelly Valves are available as Upper and Lower Kelly Valves. They can also be used as a mud saver by closing the One Piece Valve on the lower end of the Kelly before breaking a tool joint connection.