Abstract: A hydraulic exsiccate device lessens the presence of or prevents water vapor from entering the fluid reservoir of hydraulic machines which helps to reduce or eliminate damage to hydraulic systems used in environments such as boating, utilities, construction, manufacturing, fishing, industrial, marine, agriculture, military, mining, and so on. The hydraulic exsiccate device eliminates hydraulic reservoir fill caps, and in their place, the hydraulic exsiccate device is used as a cover fitting for closing the fluid reservoir (configured to conduct hydraulic fluid in the hydraulic systems) which operates to lessen the presence of or prevent water vapor from entering the fluid reservoir.

Abstract: An exsiccate device removes moisture or water from a fuel tank. Suitably the fuel exsiccate device is interposed between two pipes that fluidically communicate air or fuel. The exsiccate device contains numerous beads formed from a substance that attracts water molecules via intermolecular forces, such as van der Waals forces, without being hygroscopic. The exsiccate device can be used to filter fuel directly by using numerous beads formed from molecular sieves that are suitably transition metal aluminosilicates with a substantially uniform pore crystalline structure.