Patent ID: 8122700

Claim:
A premix nozzle for an industrial gas turbine engine comprising: a housing comprising a tubular valve portion, an outlet and a housing opening, the valve portion defining an axially extending interior, the outlet communicating with the interior, the housing opening communicating with the interior, and the housing opening being operative such that air exterior to the housing is drawn into the interior of the housing through the housing opening, mixed with fuel, and directed out of the housing through the outlet; and a valve contacting an exterior of the valve portion and having a valve opening, the valve being moveable between an open position, in which the valve opening is aligned with the housing opening such that air exterior to the housing is drawn into the interior of the housing through the valve opening and the housing opening, and a closed position, in which a reduced amount of air exterior to the housing is drawn into the interior; and a fluid actuator connecting the valve to the valve portion, and including at least one fluid actuation line operative to move the valve opening axially relative to the housing opening between the open position and the closed position.