Proportional Directional Valve 4WRZE25E220-7X/6EG24N9ETK31/F1V - Bosch Rexroth R900925739

Oil flow in presses, test rigs and machine tools can be metered steplessly instead of switched. The spool with symbol E sits on the ISO 4401-08-08-0-05 hole pattern of size 25 and releases 220 l/min nominal flow, up to 870 l/min at a maximum operating pressure of 350 bar. Pilot oil supply and pilot oil return are both internal, so no separate Y line is needed.

Benefits

• Command value 4...20 mA instead of a voltage signal, a broken wire shows up at the input as 0 mA.
• 220 l/min nominal flow and 870 l/min maximum flow cover rapid traverse and fine positioning of the same axis with one valve.
• On-board electronics with 24 V DC supply through a connector, 7-pole (6 + PE) according to EN 175201-804, no external amplifier in the control cabinet.
• Internal pilot oil supply and internal pilot oil return, the main circuit is enough and extra pilot lines are not required.
• Concealed auxiliary actuation for commissioning and fault finding without an electrical signal applied.
• FKM seals for hydraulic fluid HL, UKCA conformity covering electromagnetic compatibility (EMC) SI2016/1091, 20.06 kg weight.

Applications

Typical installations are press axes, injection moulding machines, test rigs and rolling mill hydraulics, where direction and speed of an actuator are set by an analog signal. The valve is a spool type with 3 switching positions and 4 ports and fits standard subplates and manifolds of size 25 through the ISO 4401-08-08-0-05 connection diagram. Because pilot oil is taken and returned internally, X and Y lines are not needed at the mounting point. The FKM seal version is matched to hydraulic fluid HL.

Manufacturer

Bosch Rexroth lists the valve under material number R900925739. Curves, dimensions and terminal assignment are given in the data sheets Proportional directional valve, pilot-operated (RE 29115) and Hydraulic valves and hydro- (RE 07600-B).