Description Size 16, 25, 32, 40, 50 Component series 1X Maximum operating pressure 420 bar Maximum flow 1500 l/min CE according to EMC directive 2014/30/EU Features 2/2-way version Robust: - Pressure resistance up to 420 bar - High vibration resistance (acc. to DIN EN60068-2) - Ambient temperature up to +60 °C Precise: - High response sensitivity and little hysteresis Reliable: - High-quality and proven design Normalized: - Installation dimensions according to ISO 7368 - Connectors/interfaces Flexible: - In connection with a pressure compensator pressure-compensated flow control possible Safe: - Fail-safe position of the main stage in case of power failure, cable break or disconnected enable Product description Set-up The pilot-operated proportional directional valve type 2WFCE basically consists of: Cover (1) Main stage (2) Pilot control valve with proportional solenoid (3) Integrated electronics with position transducer and analog interface (4) or external control electronics as module amplifier The electronics (integrated or external) compare the specified command value to the position actual value of the control spool of the main stage (2). In case of control deviations, the solenoid of the pilot control valve (3) is activated. In this way, the control spool is adjusted. Depending on the control deviation, the control chamber of the main stage (2) is either pressurized with pilot oil (the main stage closes) or unloaded (the main stage opens). Stroke and orifice cross-section are controlled proportionally to the command value until the control deviation is remedied. For proper function, the following has to be observed: Direction of flow A → B (X connected to A) Direction of flow B → A (X connected to B) Port Y depressurized to the tank Failure of supply voltage If the minimum supply voltage fails or is fallen below, the enable is disconnected (only interfaces B1 and G1) and in case of a cable break of the solenoid conductor, the electronics will de-energize the solenoid of the pilot control valve (3). The control spool of the main stage (2) moves securely to its seat using the pressure available at port X and the force of the main stage spring and blocks the flow between A and B. Flow control function In connection with a pressure compensator, the pilot-operated proportional directional valve can be used for the pressure-compensated control of a flow. Type code 01 02 03 04 05 06 07 08 09 10 11 12 13 2 WFC E S L - 1X / / * 01 2 main ports 2 02 Pilot-operated proportional directional valve (cartridge valve) WFC 03 With external control electronics no code With integrated electronics (OBE) E 04 Size 16 16 Size 25 25 Size 32 32 Size 40 40 Size 50 50 05 Seat control spool S Rated flow at 5 bar pressure differential 06 – Size 16 125 l/min 1) 125 160 l/min 2) 160 – Size 25 220 l/min 1) 220 330 l/min 2) 330 – Size 32 320 l/min 1) 320 650 l/min 2) 650 – Size 40 500 l/min 1) 500 940 l/min 2) 940 – Size 50 1000 l/min 1) 1000 1500 l/min 2) 1500 Flow char
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