A system for depositing foodstuff material in the fluid state on a foodstuff product, comprising: - a conveying line for feeding a plurality of foodstuff products in a direction of advance (K); - at least one unit for dispensing the fluid foodstuff material on the foodstuff products that advance on the conveying line , where the dispensing unit comprises a plurality of rows of nozzles arranged in a direction transverse to the direction of advance (K); and - a control unit for controlling the dispensing unit , wherein said dispensing unit comprises a plurality of valve devices associated to the nozzles of the plurality of rows of nozzles and designed to control the flow of the fluid foodstuff material through the nozzles , each valve device comprising: - an open/close member ; - a solenoid ; and - a magnetic element operatively connected to the open/close member and mobile between a first position in which the open/close member closes the respective nozzle , preventing dispensing of the fluid foodstuff material therethrough, and a second position in which a passage is opened through the nozzle for dispensing of the fluid foodstuff material, wherein movement of the open/close member from the first position to the second position or vice versa is driven by the magnetic element as a result of an electromagnetic interaction with said solenoid , and wherein each valve device is housed within a seat that extends until it gives out into a duct for supply of the fluid foodstuff product to the nozzle , and wherein the open/close member is constituted by an elastic body that closes said seat with respect to the supply duct and that comprises an open/close portion operatively connected to the magnetic element and mobile together therewith. - a conveying line for feeding a plurality of foodstuff products in a direction of advance (K); - at least one unit for dispensing the fluid foodstuff material on the foodstuff products that advance on the conveying line , where the dispensing unit comprises a plurality of rows of nozzles arranged in a direction transverse to the direction of advance (K); and - a control unit for controlling the dispensing unit , wherein said dispensing unit comprises a plurality of valve devices associated to the nozzles of the plurality of rows of nozzles and designed to control the flow of the fluid foodstuff material through the nozzles , each valve device comprising: - an open/close member ; - a solenoid ; and - a magnetic element operatively connected to the open/close member and mobile between a first position in which the open/close member closes the respective nozzle , preventing dispensing of the fluid foodstuff material therethrough, and a second position in which a passage is opened through the nozzle for dispensing of the fluid foodstuff material, - an open/close member ; - a solenoid ; and - a magnetic element operatively connected to the open/close member and mobile between a first position in which the open/close member closes the respective nozzle , preventing dispensing of the fluid foodstuff material therethrough, and a second position in which a passage is opened through the nozzle for dispensing of the fluid foodstuff material, wherein movement of the open/close member from the first position to the second position or vice versa is driven by the magnetic element as a result of an electromagnetic interaction with said solenoid , and wherein each valve device is housed within a seat that extends until it gives out into a duct for supply of the fluid foodstuff product to the nozzle , and wherein the open/close member is constituted by an elastic body that closes said seat with respect to the supply duct and that comprises an open/close portion operatively connected to the magnetic element and mobile together therewith. <EOS>