APARATO PARA AISLAR INDIVIDUALMENTE LOS ACCIONAMIENTOS HIDRAULICOS DE VALVULAS DE VAPOR PARA UNA TURBINA DE VAPOR.

摘要

Apparatus for individually isolating the hydraulic actuators of steam valves for a steam turbine while the turbine remains in operation and while all other steam valves associated with the turbine remain functional. Isolation is achieved by providing a manual isolation valve for blocking the flow of hydraulic fluid from a main supply; a flow restrictor to limit the inflow of hydraulic fluid; and a flow direction control means to limit hydraulic fluid to flow only from the actuator toward an emergency trip hydraulic fluid supply.