A granular product discharge flap system which is employed in dosing systems, enables discharging very fine doses of the relevant materials, and reduces assembly and disassembly times in cases of repair and maintenance requiring intervention in the system, comprising: a finished frame enabling product entry and exit, allowing the mechanical parts to be positioned thereon, and being preferably made of conductive plastic; flaps starting and stopping the material flow by opening and closing, wherein the flaps are preferably made of stainless steel; a piston providing the motion needed for opening and closing the flaps; a connecting element connecting the piston and the flaps; a pin ensuring the connection between the piston and the connecting element; a material outlet wall preventing the exiting material from being spilled around; a holding handle allowing to hold the product during assembly and disassembly; a valve enabling opening and closing the piston; an air hose ensuring an airflow between the valve and the piston; a main air inlet allowing the entry of the air required by the system therein; nuts fixing the material outlet wall and the flaps onto the frame; and characterized in that it comprises: fast assembly holes enabling the assembly of the product by sliding; a flow handle enabling to adjust the relevant flow area; a discharge hose allowing to fully expel the raw material from the system and being preferably made of conductive plastic; a discharge hose cover ensuring manual opening and closing of the discharge hose and being preferably made of conductive plastic; a flow adjustment plate being located in the interior of the flaps and enabling narrowing and expanding the flow area with the help of the flow handle; a mechanism fixing plate enabling connecting the flow handle to the frame. a finished frame enabling product entry and exit, allowing the mechanical parts to be positioned thereon, and being preferably made of conductive plastic; flaps starting and stopping the material flow by opening and closing, wherein the flaps are preferably made of stainless steel; a piston providing the motion needed for opening and closing the flaps; a connecting element connecting the piston and the flaps; a pin ensuring the connection between the piston and the connecting element; a material outlet wall preventing the exiting material from being spilled around; a holding handle allowing to hold the product during assembly and disassembly; a valve enabling opening and closing the piston; an air hose ensuring an airflow between the valve and the piston; a main air inlet allowing the entry of the air required by the system therein; nuts fixing the material outlet wall and the flaps onto the frame; and characterized in that it comprises: fast assembly holes enabling the assembly of the product by sliding; a flow handle enabling to adjust the relevant flow area; a discharge hose allowing to fully expel the raw material from the system and being preferably made of conductive plastic; a discharge hose cover ensuring manual opening and closing of the discharge hose and being preferably made of conductive plastic; a flow adjustment plate being located in the interior of the flaps and enabling narrowing and expanding the flow area with the help of the flow handle; a mechanism fixing plate enabling connecting the flow handle to the frame.