Abstract: An anhydrous ammonia vapor charge unit for an applicator tank maintains a pressure charge on an applicator tank. A secondary anhydrous ammonia tank is disposed adjacent to the applicator tank. Ammonia vapor from the secondary tank is passed through a vapor compressor and then is injected into the applicator tank to provide a greater pressure charge within the applicator tank. In a second embodiment, a small portion of a liquid flow stream of ammonia being removed from the applicator tank is separated from the flow stream, passed through a heat vaporizer for expanding from a liquid to a gas, passed through a vapor pressure, and then is injected into the applicator tank for maintaining the pressure charge on the applicator tank. Preferably the heat vaporizer used hydraulic fluid from a tractor to heat the anhydrous ammonia.

Abstract: An anhydrous ammonia nurse tank coupling had a locking collar for securing a flow nozzle to a nurse tank fitting. A nipple is threadingly secured to the fitting and has a hexagonal-shaped section. A nozzle coupling extends about said flow nozzle for threadingly securing to the flow nozzle to the nipple. The nozzle coupling and the nipple have acme threads which are secured together, with a seal element extending between the nipple and the flow nozzle. A locking collar slidably disposed on said nozzle coupling, for moving from a retracted position disposed aside of the hexagonal-shaped section of the nipple to an extended position disposed adjacent to the hexagonal-shaped section and non-rotatably securing the locking collar to the nipple. The locking collar is non-rotatably secured to the nozzle coupling in the extended position, and non-rotatably secures the nozzle coupling to the nipple when in the extended position.

Abstract: A flow dividing manifold (12) divides a flow of anhydrous ammonia having both liquid and gas phases into separate flow paths. The manifold (12) has a first mixing nozzle (32) for concentrating the flow of the anhydrous ammonia in a first direction (46) against a first enclosed end (50) of a first mixing chamber (48). A second mixing nozzle (48) concentrating the flow of anhydrous ammonia in a second direction (76) orthogonal to the first direction (46) and against a second enclosed end (80) of a second mixing chamber (78). A flow divider structure (96) is disposed about an outward end of the second mixing chamber (78) and has a plurality of flow ports (90) which are angularly spaced around and extend orthogonal to the second flow direction (76) through the second mixing nozzle (64).