11 Filter vessels used for filtering hydraulic fluid, biodegradable hydraulic fluid, mineral oils, lubricating oils, and inflammable fluids; filter elements as part of filters all for the handling, treatment, and processing of liquids and fluids in industrial, commercial, and environmental uses; filter units for filtering, filling, and flushing of hydraulic systems, oil service systems, and lubrication systems; oil purification equipment; filtration and lubrication system consisting primarily of filter elements of various materials, watersorb filter elements, internal and external valves, pipes, hoses, tanks, breather filters, housings, heaters, magnet valves, pumps, motors, coolers, temperature, pressure, water saturation, and level indicators, particle counters, metal particle sensors, and controllers for supplying gear lubrication while filtering and deaerating the lubricant ; mobile off-line filter units; stationary filter units; fluid purifier systems consisting primarily of filter elements of various materials, watersorb filter elements, internal and external valves, pipes, hoses, tanks, breather filters, housings, heaters, magnet valves, pumps, motors, coolers, temperature, pressure, water saturation, and level indicators, particle counters, metal particle sensors, and controllers; hydraulic fluid filters; lubricating fluid filters; lubricating fluid heater and cooler for wind power