Apparatus, systems and methods for applying fluidized materials to surfaces are encompassed by the present disclosure. The apparatus and systems can include a movable carriage supporting an applicator mount assembly that receives a fluidized material applicator for applying a fluidized material to a surface. The applicator system can move a fluidized material applicator in a reciprocating cycle along a horizontal path and allow for the pivotal rotation of the fluidized material applicator about a vertical axis while the applicator is applying a fluidized material to a surface. An accessory applicator system also is provided that can be used in conjunction with or separate and apart from the applicator system and can be used to apply a fluidized material to a surface via a roller, brush or similar non-spray applicator. The apparatus and systems encompassed by the present disclosure can be operated remotely away from the surface to which a fluidized material is applied.

Provided are washout devices for cleaning the interior of a frac tank. In embodiments, the devices may comprise (i) a wand comprising a first pipe and a second pipe; wherein the second pipe is positioned in parallel below the first pipe; wherein one or more trusses connect the first pipe and the second pipe; (ii) a support member in communication with a proximal end of the wand such that the wand is suspended above and at a desired angle relative to the ground; (iii) one or more washout nozzles disposed along the length of the first pipe. Embodiments may also include a system and a process for cleaning the interior of a frac tank.

The agricultural sprayer includes a base with two vertical guides fixed thereon and carriages mounted on and capable of traveling along said guides. A ducted fan is turnably mounted on axles between the carriages. The inner surface of the fan duct is equipped with nozzles connected to a liquid container. One of the carriages consists of two parts: the first and the second one, with the second part capable of moving relative to the first one. The first and the second parts of said carriage have a duct-swinging crank-rocker mechanism mounted thereon. Said mechanism is configured for setting the inclination angle of the fan duct and adjusting its oscillation amplitude.

An automated mobile sprayer (AMS) (12) is configured to apply stripes of fluid to target surfaces to coat those target surfaces with the fluid. A control module (24) of the AMS (12) controls movement and spraying by the AMS. The control module (24) causes the AMS (12) to follow a target surface based on distance data from distance sensors configured to detect the target surface.