Air conveying system for filling of air seeder tank

A method of replenishing a supply of a particulate agricultural material in a tank of a pneumatic agricultural material conveying system, the method comprising:

• supplying air from a pneumatic source to an agricultural material reservoir;
• providing a valve operatively connected to the pneumatic source and the tank, the valve including a rotor having a transverse passageway providing air flow from the pneumatic source therethrough and to the tank, the rotor also including a first region and a second region which are each configured to permit airflow therethrough;
• providing a valve housing which cooperates with the transverse passageway, the first region and the second region of the rotor of the valve in the valve housing to selectively direct air flow through or block air flow in the transverse passageway, the first region, and the second region when the rotor is positioned in a normal operating position and a replenishing position;
• positioning the rotor in the replenishing position relative to the valve housing to block air flow through the transverse passageway and to permit air flow in a first direction through the first region and to permit air flow in a second direction through the second region;
• passing air in the first direction through the first region of the rotor and through a restriction operatively coupled to the rotor, the agricultural material reservoir, and the tank to create a region of increased air velocity and reduced air pressure for ingesting agricultural material from the agricultural material reservoir and providing an air entrained flow of material;
• conveying the flow of air entrained material to the tank;
• depositing the material in the tank;
• simultaneously moving exhaust air from the tank in the second direction through the second region of the rotor;
• and
• venting exhaust air from the tank.