A solvent flush cleaning system for a paint supply system. The cleaning system includes an air injection system that injects air directly into the pumping chambers of the solvent pump to entrain air within the solvent. The cleaning system preferably includes a dedicated double diaphragm pump that circulates the solvent. The air injection system preferably includes a pair of injection valves that cooperate to selectively supply pressurized air to each pumping chamber. The air injection system further includes an actuation assembly that times the injection valves so that pressurized air is supplied to each pumping chamber as that chamber expands. The actuation assembly includes actuation valves that are operated by pressure within the air chambers of the pump. When pressure builds in one air chamber, it opens the corresponding actuation valve, which in turn actuates the injection valve causing pressurized air to be supplied to the opposite pumping chamber.

The present invention relates to a device at washing apparatus for washing objects, preferably spray guns, with a washing liquid, preferably a solvent. The washing apparatus (1, 2, 3 or 3A) has at least one wash chamber (5) in which the object (4) is located for washing and at least one first container (B1) for collecting impure washing liquid from the wash chamber (5). The washing apparatus (1, 2, 3 or 3A) further comprises a distilling device (8) for distillation of impure washing liquid and obtaining pure washing liquid. This distilling device (8) includes a third container (B3) in which impure washing liquid is vaporized. Means are provided to see to that the volume (V1) of impure washing liquid which at the most or as a maximum can be brought to flow from said first container (B1) to said third container (B3) is equal to or less than the volume (V3) for washing liquid in said third container (B3) in order to prevent said third container (B3) from located overfull (FIG. 1).

A cleaning equipment for a spraying paint gun includes a container, a branch sum up, a pipeline structure, an auxiliary rock set, a coth-hook set, and a buckle structure. The pipeline structure is settled inside the container whereas the auxiliary rock set is fixed and settled on the pipeline structure. The cloth-hook set is settled on the branch sum up of the fixed container whereas the buckle structure is used to fix the brake shaft and the handle of the spraying paint gun so that inside the pipeline of the spraying paint gun it is open.

A spray application system is disclosed having an enclosure with a spray chamber, a spray applicator within the chamber, and a liquid barrier such as a sprayed water curtain, within the chamber, upstream or downstream of the spray applicator. The water is preferably sprayed downward to create a vacuum for drawing the treating substance downward into the liquid barrier. The liquid barrier preferably does not contact the workpieces that instead pass overhead. Independent pressure gauges and flow regulators may be used for the upstream liquid barrier, the downstream liquid barrier, and the spray applicator. The chamber may have a roof section that is secured to a beam or other process line support, and the walls may be suspended from the roof section. The roof section may have an opening running across its length to allow hangers from an overhead processing line to pass through the chamber.