Valve system

A valve system comprising: a valve (4) comprising a valve stem (13); a valve actuator (2) for controlling the opening and closing of the valve (4) and comprising a piston (14) coupled to the valve stem (13) and defining a first chamber (6) of the valve actuator (2); a valve positioner (3) for controlling the valve actuator (2) and adjusting the position of the valve stem (13); and a coupling system (10) comprising: a coupling element (20) for connecting the valve positioner (3) to the valve actuator (2), the coupling element (10) comprising a first channel (22) in fluid communication with a fluid outlet of the valve positioner (3); and a rod extension (30) moving with the valve rod (13) and comprising a second channel (32) in fluid communication with the first channel (22) and the first chamber (6) of the valve actuator (2). 一种阀系统，包括：阀(4)，该阀包括阀杆(13)；阀致动器(2)，其用于控制所述阀(4)的打开和关闭并且包括活塞(14)，活塞联接到所述阀杆(13)并且限定所述阀致动器(2)的第一腔室(6)；阀定位器(3)，其用于控制所述阀致动器(2)并调节所述阀杆(13)的位置；以及联接系统(10)，其包括：联接元件(20)，其用于将所述阀定位器(3)连接到所述阀致动器(2)，所述联接