A mobile dispersion system for use in the hydraulic fracturing operation and oil and gas applications, wherein the mobile dispersion system is used for hydrating and dosing of water soluble polymers into an aqueous solution, and houses equipment, sensors and human interfaces, including but not limited to: fluid pumps, fluid mixers to convert the dry powder into a liquid solution, multiple valves and sensors to monitor various parameters; Slurry blender machines for use in oil or gas well hydraulic fracturing operations; Valves being parts of a mobile dispersion system for use in the hydraulic fracturing machines; High-pressure pumps for use in oil or gas well hydraulic fracturing operations; Hydraulic pumps and motors for hydrostatic systems, comprised of pumps, motors, valves, switches, sensors and electronic controls, for hydraulic drives and force transmission in machines