Sanitary valve system comprising: - an actuator arrangement in an actuator housing comprising ∘ a first piston chamber with a first piston separating the first piston chamber in a first upper cavity and a first lower cavity and having a first piston shaft configured to operate outside of the actuator housing; ∘ a second piston chamber with a second piston separating the second piston chamber in a second upper cavity and a second lower cavity and having a second piston shaft configured to operate outside of the actuator housing; ∘ respective first and second upper and lower liquid communication lines (50IU, 50IL, 50IIU, 50IIL) communicating an incompressible liquid to respective first and second upper and lower cavities (34IU, 34IL, 34IIU, 3411L) for moving or locking the respective first and second pistons (321,3211); ∘ the respective first and second pistons (361,3611) being interconnected and independently operable; - a valve arrangement comprising a first valve operably connected to the first piston shaft and a second valve operably connected to the second piston shaft; - at least one liquid regulator arrangement configured to regulate pressure or flow of the incompressible liquid in at least one set of upper and lower regulation lines (82U,82L) communicating with the respective first and second upper and lower cavities (34IU, 34IL, 34IIU, 34IIL) via the respective first and second upper and lower communication lines (50IU, 50IL, 50IIU, 50IIL) via a common distribution plate arrangement characterized in being configured to operate in multiple states comprising - a first state where each respective first and second pistons (321, 3211) are operated independently of each other according to respective first and second functions (1101, 110II); - a second state where the first and second pistons (32I,32II) are operated jointly according to a joint function and where each state (101, 102) and transitions amongst states are controlled by regulating the liquid pressure or flow in each respective first and second upper and lower cavities (34IU, 34IL, 34IIU, 34IIL) via the common distribution plate arrangement with least one common distribution plate with a set of canals configured to connect at least one set of upper and lower regulation lines (82U,82L) with the respective first and second upper and lower communication lines (50IU, 50IL, 50IIU, 50IIL). - an actuator arrangement in an actuator housing comprising ∘ a first piston chamber with a first piston separating the first piston chamber in a first upper cavity and a first lower cavity and having a first piston shaft configured to operate outside of the actuator housing; ∘ a second piston chamber with a second piston separating the second piston chamber in a second upper cavity and a second lower cavity and having a second piston shaft configured to operate outside of the actuator housing; ∘ respective first and second upper and lower liquid communication lines (50IU, 50IL, 50IIU, 50IIL) communicating an incompressible liquid to respective first and second upper and lower cavities (34IU, 34IL, 34IIU, 3411L) for moving or locking the respective first and second pistons (321,3211); ∘ the respective first and second pistons (361,3611) being interconnected and independently operable; ∘ a first piston chamber with a first piston separating the first piston chamber in a first upper cavity and a first lower cavity and having a first piston shaft configured to operate outside of the actuator housing; ∘ a second piston chamber with a second piston separating the second piston chamber in a second upper cavity and a second lower cavity and having a second piston shaft configured to operate outside of the actuator housing; ∘ respective first and second upper and lower liquid communication lines (50IU, 50IL, 50IIU, 50IIL) communicating an incompressible liquid to respective first and second upper and lower cavities (34IU, 34IL, 34IIU, 3411L) for moving or locking the respective first and second pistons (321,3211); ∘ the respective first and second pistons (361,3611) being interconnected and independently operable; - a valve arrangement comprising a first valve operably connected to the first piston shaft and a second valve operably connected to the second piston shaft; - at least one liquid regulator arrangement configured to regulate pressure or flow of the incompressible liquid in at least one set of upper and lower regulation lines (82U,82L) communicating with the respective first and second upper and lower cavities (34IU, 34IL, 34IIU, 34IIL) via the respective first and second upper and lower communication lines (50IU, 50IL, 50IIU, 50IIL) via a common distribution plate arrangement characterized in being configured to operate in multiple states comprising - a first state where each respective first and second pistons (321, 3211) are operated independently of each other according to respective first and second functions (1101, 110II); - a second state where the first and second pistons (32I,32II) are operated jointly according to a joint function and