Patent ID: 7650908

Claim:
A system comprising: a valve assembly comprising an inlet port, an outlet port, and a fluid conduit fluidly connecting the inlet and outlet ports for allowing fluid to pass therebetween, a stop valve having a spindle that is centrally mounted within the valve assembly and a valve head mounted on the spindle, the stop valve spindle being configured, arranged, and operable to move the stop valve head between an open position, in which the inlet port is in communication with the outlet port, and a closed position, in which the outlet port is isolated from the inlet port, and a control valve having at least one spindle that is eccentrically mounted within the valve assembly and a valve head mounted on the at least one control valve spindle, the at least one control valve spindle being configured, arranged, and operable to move the control valve head for graduated flow control of fluid passing along the fluid conduit, the stop valve head being nested within the control valve head when the stop valve is in the open position; and a controller configured and arranged to monitor conditions external to, internal to, or both, the valve assembly and to control the position of the valves within the assembly according to said conditions.