Description Size 25 … 50 Component series 1X Maximum operating pressure 315 bar Maximum flow 2250 l/min Nominal flow 190 … 750 l/min Features 3/3-directional cartridge valve Control spool with anti-rotation feature and control edges in servo-type quality With inductive position transducer at the main control spool and pilot control valve Position-controlled with integrated electronics (OBE) Completely adjusted unit Product description Valves of type 3WRCBEE are pilot-operated, 2-stage directional high-response cartridge valves. They control the flow direction and size. Set-up The valves consist of the following assemblies: Cover (1) with connection surfaces, Main control spool (7) with control edges, Socket (2), Pilot control valve (3) with paired control spool socket unit and inductive position transducer (6) Integrated electronics (OBE) (4) with inductive position transducer (12) of the main control spool Function Switching of the main control spool (7) via the pilot control valve (3); pressure build-up in the control chamber (10) acts on the surface (8) – the pressure of the connection A counteracts on the area (11) and the spring force (9). Control of the control spool of the pilot control valve through the proportional solenoid (5) against the spring force in the pilot control valve. Linking the command values (4) and actual values (12 and 6) in the microcontroller of the integrated electronics (OBE) (4). Pilot oil supply Y to pilot control valve connection P; pilot oil drain via Y to the container. With a command value of 0 V or 12 mA, the electronics controls the main control spool (7) in central position. This way, fifty percent of the system pressure ( p P/2) will be set in connection A. Area ratio of area (11) to area (8) at: Size 25 = 1:1.5 Size 32 = 1:1.5 Size 50 = 1:1 Failure of supply voltage Integrated electronics (OBE) de-energize the solenoid in case of supply voltage failure or cable break Depressurizing the control spool surface (8) via the pilot control valve (3) after Y to the container. Spring force (9) and pressure in connection A of the area (11) will cause the main control spool (7) to open the connection A to T and close P to A Notice: Supply voltage failure will cause an abrupt standstill of the control loop. The acceleration forces occurring in this connection may cause machine damage. Type code 01 02 03 04 05 06 07 08 09 10 11 12 13 14 3 WRCB EE V M ‒ 1X / G24 K31 M * 01 3 main ports 3 02 Directional high-response cartridge valve, pilot-operated WRCB 03 Integrated electronics (OBE) EE 04 Size 25 25 Size 32 32 Size 50 50 05 Control spool with zero overlap V Area ratio at the control spool (determined at the factory) 06 1:1 (NG50) no code 1:1,5 (NG25, 32) F Rated flow ( Δp = 5 bar) 07 Size 25 [si]190 l/min[/si][imp]50.2 US gpm[/im 190 Size 32 380 l/min 380 Size 50 750 l/min 750 Flow characteristic 08 Inflected characteristic curve, progressive with linear fine control range M 09 Component series 10 ... 19 (10 ... 19: un
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