Pilot-operated relief valve PRE* series

— PRE* valves are pilot operated pressure relief valves with electric proportional control and mounting interface in compliance with ISO 6264 standards (CETOP RP 121H). — These valves are normally used to control hydraulic circuit pressure and enable the use of the full flow rate of the pump, even with settings approaching calibrated values. — The two-stage design and wide passages ensure reduced pressure drops thereby improving the system energy performance. — Pressure can be modulated continuously in proportion to the current supplied to the solenoid. — These valves can be controlled directly by a current control supply unit or by means of the relevant electronic control units to exploit valve performance to the full (see par. 10). — They are fitted with a manual pressure relief valve which is factory set to ≥15% of the maximum value in the pressure control range. — They are available in three sizes for flow rates up to 500 l/min and in four pressure control ranges up to 350 bar.