Proportional pressure valve, piloted, with feedback and integrated electronics Le pre*j, pre*jl, jh, are proportional valves of maximum pressure, piloted, with integrated electronics and feedback for closed pressure ring. They are used to modulate the pressure of the hydraulic circuit and allow you to use the entire pump flow also to pressure values ​​close to the calibration value. They are equipped with maximum pressure valve. The calibration is performed in duplica to a value of ≥ 15% of the maximum pressure value in the regulation field. They are available in three different sizes for courses up to 500 l/min and in three pressure adjustment fields up to 350 bar. Electronics options on board for closed pressure ring: