A pressurization unit is also in fluid communication with the tank. An anhydrous ammonia meter is in fluid communication with the tank for dispersing controlled amounts of the anhydrous ammonia. The system includes a tank for containing the pressurized anhydrous ammonia. By preventing vaporization of the ammonia within the system, uniform and accurately controlled flow rates can be dispensed from the dispensing tubes.Ībstract: A system for applying pressurized anhydrous ammonia to soil. In particular, the flow control devices allow ammonia to be dispensed from the system while maintaining sufficient back pressure within the distribution manifold to maintain the ammonia in a liquid form. According to the present invention, a constant pressure flow rate control device is placed at each dispensing tube for metering the amount of ammonia fed to the soil. From the pressurized vessel, the ammonia is fed to a distribution manifold where it is ultimately injected into a soil through a plurality of dispensing tubes. The ammonia is placed in a vessel under sufficient pressure to maintain a substantial portion of the ammonia in a liquid form. By maintaining the ammonia in a liquid form, uniform and accurately controlled flow rates can be dispensed from the dispensing tubes.Ībstract: The present invention is generally directed to a system and to a process for dispensing a volatile liquid fertilizer and particularly ammonia into a field. In particular, the flow control devices allow ammonia to be dispensed from the system while maintaining sufficient back pressure and temperature within the distribution manifold to maintain the ammonia in a liquid form. Furthermore, the outlet flow of each constant pressure rate control device is made to vaporize nearby the inlet flow path to create a heat exchange effect thereby cooling the inlet flow. A constant pressure flow rate control device is placed at each dispensing tube for metering the amount of ammonia fed to the soil. Publication/Patent Number: US20050076818A1Ībstract: A system and process for dispensing a liquid agrochemical such as ammonia into a field is disclosed. The processor also actuates each of the agricultural spray system components such as the spray nozzles to selectively control each of the nozzles or a designated group of the nozzles. The processor conveys information to an operator regarding the agricultural spray system component based on the sensed vibrations. The networked delivery system also includes a control area network with a computer processor in communication with the vibration sensors. When the solenoid valves are attached to pressure-atomization spray nozzles, control over spray pattern and droplet size is further achieved.Ībstract: A networked delivery system and method for controlling operation of a spraying system includes nozzles for emitting an agrochemical according to a predetermined spray pattern and flow rate vibration sensors located adjacent an agricultural spray system component to sense vibrations of the agricultural spray system component, such as spray nozzles. This wide range of pressure control indirectly allows the flow-controlled liquid application system to operate over a wider range of flow control, yielding indirect benefits to performance and productivity. This pulsing solenoid valve technique preserves a high degree of accuracy and uniformity through a wide range of pressure control.

Direct acting solenoid valves are pulsed at varying frequencies and duty cycles0000change the resistance to flow encountered by the flow-controlled liquid application system. Abstract: An electrically-actuated variable pressure control system for use with flow-controlled liquid application systems.

Capstan ag systems