Combined regulating quick-acting valve for a steam turbine

摘要

The valve has a piston (13) arranged in a housing i.e. hollow cylinder, moved relative to the housing and brought into passage- and blocking positions. Steam (7) is passed from an inlet opening (3) to an outlet opening (4) via a passage channel (14) depending on degree of overlap of the inlet- and outlet openings and the channel in the passage position, such that a control function of the valve is achieved. The inlet- and the outlet openings are closed by an outer periphery of the piston in the blocking position, such that quick action of the valve is achieved.