Patent ID: 6293300
Filing Date: 2001-09-25
Classification: F16K,Y10T

Abstract:
A valve assembly, comprising:a valve body formed of a valve cylinder having an upper end and a lower end, an inlet port at one end thereof, an outlet port on an opposite end thereof aligned with said inlet port and at least one outlet port on a side thereof;an annular ring disposed between said valve cylinder upper end and said valve cylinder lower end having upper and lower ends, each of said upper and lower ends of said annular ring having upper and lower valve seats, respectively, and being sealed around its periphery to said valve cylinder;a central portion of said ring having an interior surface and an exterior periphery connecting said upper and lower ends of said ring, said central portion having at least one opening therethrough extending between said interior surface and said periphery and being in fluid flow communication with said side outlet port;an actuator assembly fitted in said cylinder including:first and second valve actuators,a first actuator rod attached to and actuatable by said first actuator, one end of said rod projecting outwardly from said actuator, a valve stem attached to the projecting end of said actuator rod and having a valve plug for opening and closing said lower valve seat,a second actuator rod attached to and actuatable by said second actuator, said second rod being in the form of a hollow cylinder concentric and coaxial with said first actuator rod, said first and second rods being independently actuatable by said first and second actuators, a hollow cylindrical valve stem attached to the projecting end of said hollow actuator rod and having a valve plug for opening and closing said upper valve seat, said valve plug having a central opening through which said first actuator is fitted,an independently controllable actuator assembly in said side outlet port including a valve actuator, an actuator rod attached to and actuatable by said actuator, one end of said rod projecting outwardly from said actuator, and a valve plug attached to the projecting end of said actuator rod for closing said outlet port, said outlet port, when open being in flow communication with a drain open to the atmosphere whereby liquids can be drained by gravity from the space between said ring and said cylinder when said side outlet is open.