초록 ▼

A high pressure multistage valve in which a multiflanged plug is shiftable vertically within a passage provided by a stack of encircling rings, which can be readily exchanged or replaced. A turnable stem effects linear movement of the plug via a motion converting mechanism located in the interior of

A high pressure multistage valve in which a multiflanged plug is shiftable vertically within a passage provided by a stack of encircling rings, which can be readily exchanged or replaced. A turnable stem effects linear movement of the plug via a motion converting mechanism located in the interior of the valve. A lubricating system for the mechanism has a movable interface with the fluid being controlled.

대표청구항 ▼

In a multiple stage valve having walls defining a cavity, a stack of separate stage rings arranged within said cavity, said stage rings defining a flow passageway for conducting fluid from an inlet in said body axially through said stack to an outlet from said body, and a valve member within said ca

In a multiple stage valve having walls defining a cavity, a stack of separate stage rings arranged within said cavity, said stage rings defining a flow passageway for conducting fluid from an inlet in said body axially through said stack to an outlet from said body, and a valve member within said cavity cooperatively related to said stage rings to control said axial fluid flow through said valve, each stage ring having a ring portion and an inwardly projecting annular flange, said flange having an upstream face, a downstream face, and an intermediate face, said downstream face of at least certain rings being formed with plural stepped portions.