Abstract: A high pressure ball valve seal assembly utilizes primary, secondary, and tertiary seals to withstand debris, caustic fluids, high pressure, and high temperature. The seal assembly comprises first and second inner seats and first and second outer seats which are retained within the valve body. First inner and outer seats are mounted on a first side of a closure member in the valve cavity and second inner and outer seats mounted on a second side of the closure member opposite the first side. A plurality of sealing rings are provided, whereby the sealing rings may be arranged to provide a tertiary upstream seal physically located on the downstream side of the ball valve.

Abstract: A high pressure ball valve seal assembly utilizes primary, secondary, and tertiary seals to withstand debris, caustic fluids, high pressure, and high temperature. The seal assembly comprises first and second inner seats and first and second outer seats which are retained within the valve body. First inner and outer seats are mounted on a first side of a closure member in the valve cavity and second inner and outer seats mounted on a second side of the closure member opposite the first side. A plurality of sealing rings are provided, whereby the sealing rings may be arranged to provide a tertiary upstream seal physically located on the downstream side of the ball valve.

Abstract: A valve body defines a valve stem opening. A valve stem comprises an enlarged portion greater than the valve stem opening to thereby secure the valve stem within the valve body by limiting radially outward movement of the valve stem with respect to the valve body. A rotary member comprise upper and lower bosses. Upper and lower split trunnions, with split components that can be inserted from opposite sides of the valve body, are used to rotationally support the upper and lower bosses to permit rotation of the rotary member while preventing axial movement of the axial flow path of the valve.

Abstract: A valve body defines a valve stem opening. A valve stem comprises an enlarged portion greater than the valve stem opening to thereby secure the valve stem within the valve body by limiting radially outward movement of the valve stem with respect to the valve body. A rotary member comprise upper and lower bosses. Upper and lower split trunnions, with split components that can be inserted from opposite sides of the valve body, are used to rotationally support the upper and lower bosses to permit rotation of the rotary member while preventing axial movement of the axial flow path of the valve.

Abstract: A valve body defines a valve stem opening. A valve stem comprises an enlarged portion greater than the valve stem opening to thereby secure the valve stem within the valve body by limiting radially outward movement of the valve stem with respect to the valve body. A rotary member comprise upper and lower bosses. Upper and lower split trunnions, with split components that can be inserted from opposite sides of the valve body, are used to rotationally support the upper and lower bosses to permit rotation of the rotary member while preventing axial movement of the axial flow path of the valve.

Abstract: A lubrication system for the block and bleed valve seat of a gate valve. Lubrication is provided to the seat through tubing which communicates with the exterior of the gate valve to supply the lubricant and the interior channels of the valve seat. Seals in the valve seat maintain the lubricant within the interior channels of the seat. The lubrication system allows the user to test each seat for integrity without exposing the entire valve to atmosphere by increasing lubricant pressure through the valve seat.