Injection molding system comprising several first actuator systems (D1,D2,D3), the first actuator system comprising: - at least one piston drive having at least two pressure line connectors (CP2, CP3) to drive a piston to open or close a molding nozzle, - pressure lines (L1, L2) connectable to a change over valve having a pressure line connector and tank line connector and at least two change over pressure line connectors, wherein the first change over valve pressure line connector is connectable to a first pressure line and the second change over valve pressure line connector is connectable to a second pressure line, wherein the second pressure line is connected to the second pressure line connector of the piston drive, - an electronically adjustable flow control valve having a first pressure line connector and a second pressure line connector, wherein the first pressure line connector of the adjustable flow control valve being connected to the first pressure line to allowing a connection to the first pressure line connector of the change over valve, and the second pressure line connector is connected to a third pressure line which establishes a connection to the second pressure line connector of the piston drive, - at least one electronic flow sensor for (PI, P2, P3) sensing flow rate in the first, second and/or third pressure lines (L1, L2, L3), - a controller connected to the adjustable flow control valve and to the at least one sensor, configured to electronically adjust the flow control valve, depending on information of the at least one sensor, controlling thereby the timing and the speed of the movement of the piston and the molding nozzle; wherein the several first actuator systems, and the sensors and the flow control valves are connected to the controller and the controller, which is configured to control one or more of the flow control valves based on one or more of the information of the sensors and wherein the several first actuator systems are configured to be controlled in a cascade, and wherein the flow control valves of one first actuator system is also configured to be controlled by the information of the at least one sensor of a different first actuator system and preferably by a timer and/or by a certain amount of fluid measured. - at least one piston drive having at least two pressure line connectors (CP2, CP3) to drive a piston to open or close a molding nozzle, - pressure lines (L1, L2) connectable to a change over valve having a pressure line connector and tank line connector and at least two change over pressure line connectors, wherein the first change over valve pressure line connector is connectable to a first pressure line and the second change over valve pressure line connector is connectable to a second pressure line, wherein the second pressure line is connected to the second pressure line connector of the piston drive, - an electronically adjustable flow control valve having a first pressure line connector and a second pressure line connector, wherein the first pressure line connector of the adjustable flow control valve being connected to the first pressure line to allowing a connection to the first pressure line connector of the change over valve, and the second pressure line connector is connected to a third pressure line which establishes a connection to the second pressure line connector of the piston drive, - at least one electronic flow sensor for (PI, P2, P3) sensing flow rate in the first, second and/or third pressure lines (L1, L2, L3), - a controller connected to the adjustable flow control valve and to the at least one sensor, configured to electronically adjust the flow control valve, depending on information of the at least one sensor, controlling thereby the timing and the speed of the movement of the piston and the molding nozzle;