Patent ID: 11891255
Assignee: NTE HOLDING S.R.L.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 9:
10. A fluid control system in a pneumatic conveying duct for powdered or granular material, comprising:
a conveying duct inside which the powdered or granular material is conveyed;
a plurality of supply sources of respective pressurized gases for transporting said powdered or granular material inside said conveying duct;
a plurality of injection lines of said gases to respectively put the supply sources in fluid communication with said conveying duct;
a plurality of self-regulating pressure valves arranged respectively on the injection lines between the respective supply sources and said conveying duct;
a plurality of control members respectively operatively connected to the self-regulating pressure valves to respectively provide command signals, representing pressure values, to the self-regulating pressure valves, each of the self-regulating pressure valves maintaining constant gas flow values supplied in said conveying duct;
a plurality of flow and flow rate meters, respectively arranged on the injection lines upstream of the self-regulating pressure valves to transmit flow and flow rate values to the control members;
a single centralized controller; and
wherein each of the control members comprises a local proportional valve controlled by the single centralized controller.