A liquid tank for an electrostatic atomizer for liquids is provided, including a receiving space for a liquid and a delimiting wall delimiting the receiving space with respect to the surrounding area. The liquid tank further includes a self-closing valve connecting the liquid tank to the atomizer.

An electrostatic spray system (10) includes a supply module (14) configured to store a supply of charged liquid for spraying by an electrostatic sprayer (26). A feed module (12) is connected to the supply module to fill the supply tank (44) of the supply module as needed during spraying to provide a continuous supply of liquid for the electrostatic sprayer. The feed module is controlled such that the feed module is electrically isolated from a main reservoir (18) connected to earth ground potential when the feed module is providing liquid to the supply module, and the feed module is electrically isolated from the supply module when the feed module is receiving liquid from the main reservoir. The feed module transfers the liquid from the main reservoir to the supply module without electrically connecting the supply module to the main reservoir (18).

An isolation valve for a fluid spray system includes an inlet module for receiving fluid from a main reservoir, an outlet module for providing fluid received from the inlet module to a sprayer, and an actuating module for driving the inlet module between a connected state and an isolated state. The inlet module is mechanically and fluidly connected to the outlet module in the connected state. The inlet module is spaced from the outlet module thereby generating an air gap and electrically isolating the inlet module from the outlet module in the isolated state. The outlet module includes a wash system that draws wash fluid from a wash reservoir as the inlet module transitions to the connected state and drives the wash fluid to clean a portion of the inlet module as the inlet module transitions from the connected state to the isolated state.

Liquid tank for an atomizer for liquids, in particular, an electrostatic atomizer, the liquid tank comprising a receiving space for a liquid and a delimiting wall for delimiting the receiving space with respect to the surrounding area, the liquid tank comprising a self-closing valve for connection to the atomizer.