The 210/250LDN0040 to 0400 dual filters are designed for hydraulic systems, separating solid materials from fluids and lubricating oils, with in-line installation. They allow for the replacement of filter elements without operational interruptions. They stand out for their efficient filter materials, high element resistance, mechanical-optical maintenance indicator, pressure equalization function, cyclonic flow filtration support, and bypass valve option. They operate between -10°C and +100°C, nominal pressures from 210 to 250 bar, and connections up to 1 1/2".