Proportional valves, pressure, piloted with integrated electronics Le pre*g, pre*GL, pre*GH are proportional valves regulatory of maximum pressure, with integrated electronics and for plate assembly. 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 sizes, per flow rate up to 500 l/min and in four pressure adjustment fields, up to 350 bar. Electronics options on board for open ring: