An actuating device for displacing a gate valve of a flow control device, comprising: an electric drive comprising at least one torque motor; a thread drive that is rotatable by the electric drive and comprising a threaded spindle and a screw nut, wherein the at least one torque motor is connected to the screw nut in a rotationally-fixed manner and the threaded spindle is axially displaceable to displace the gate valve of the flow control device between an advanced position and a retracted position; a position detection device configured to determine an axial position of the threaded spindle; a torque control/regulation device configured to control the at least one torque motor; at least two housing sections (16, 17) detachably connected to one another, the electric drive being arranged in a first housing section and a spring assembly being arranged in a second housing section; a spindle head detachably fastened to an extension end of the threaded spindle; wherein the torque motor is operable to: axially displace the threaded spindle so as to displace the gate valve towards the advanced position, such as to compress the spring assembly; and statically hold an axial position of the threaded spindle under a holding current; characterized in that the actuating device further comprises: a piston rod having a first end fastened to the spindle head; and an opening insert connected to a second end of the piston rod and displaceably supported in the second housing section, the spring assembly being operatively arranged between the opening insert and the second housing section, the second end of the piston rod protruding out of the opening insert and being connectable to the gate valve, wherein the torque motor is further operable to: upon cutting back of the holding current, work as a generator and slow down a corresponding closing speed of the threaded spindle towards the retracted position under a resetting force of the spring assembly. an electric drive comprising at least one torque motor; a thread drive that is rotatable by the electric drive and comprising a threaded spindle and a screw nut, wherein the at least one torque motor is connected to the screw nut in a rotationally-fixed manner and the threaded spindle is axially displaceable to displace the gate valve of the flow control device between an advanced position and a retracted position; a position detection device configured to determine an axial position of the threaded spindle; a torque control/regulation device configured to control the at least one torque motor; at least two housing sections (16, 17) detachably connected to one another, the electric drive being arranged in a first housing section and a spring assembly being arranged in a second housing section; a spindle head detachably fastened to an extension end of the threaded spindle; wherein the torque motor is operable to: axially displace the threaded spindle so as to displace the gate valve towards the advanced position, such as to compress the spring assembly; and statically hold an axial position of the threaded spindle under a holding current; axially displace the threaded spindle so as to displace the gate valve towards the advanced position, such as to compress the spring assembly; and statically hold an axial position of the threaded spindle under a holding current; characterized in that the actuating device further comprises: a piston rod having a first end fastened to the spindle head; and an opening insert connected to a second end of the piston rod and displaceably supported in the second housing section, the spring assembly being operatively arranged between the opening insert and the second housing section, the second end of the piston rod protruding out of the opening insert and being connectable to the gate valve, a piston rod having a first end fastened to the spindle head; and an opening insert connected to a second end of the piston rod and displaceably supported in the second housing section, the spring assembly being operatively arranged between the opening insert and the second housing section, the second end of the piston rod protruding out of the opening insert and being connectable to the gate valve, wherein the torque motor is further operable to: upon cutting back of the holding current, work as a generator and slow down a corresponding closing speed of the threaded spindle towards the retracted position under a resetting force of the spring assembly.