R901000848 DBET-6X/350G24K4V Proportional overflow valve from Rexroth, Germany

FAQ:

1. Maximum Pressure Rating (350 bar)

   The "350"​ denotes the maximum adjustable pressure rating​ of 350 bar. This is the highest standard setting in the DBET-6X series, designed for high-pressure circuits. However, it retains the same low flow capacity (2 L/min) as other models in the series.

2. Standard Coil (1600 mA)

   This standard version uses a 1600 mA coil​ (no -8​ suffix). It provides higher magnetic force but generates more heat compared to the 800 mA low-power variants. Ensure your external amplifier can deliver the required current.

3. Direct-Operated Seat Design (DBET)

   This valve uses a poppet and seat​ mechanism directly actuated by a proportional solenoid. It provides excellent sealing (zero leakage at closed center) and fast response but has a very low flow capacity. It is designed for pressure control, not for high-flow bypass.

4. External Electronics Required (/K4)

   The suffix /K4​ indicates a 3-pole plug socket​ for connection to an external control amplifier​ (e.g., Rexroth VT-5000 series). The valve itself has no on-board electronics (OBE), so you must provide an external amplifier that delivers the controlled current to the solenoid.

5. Critical Installation Notes

   • External Amplifier:​ You must use a compatible proportional amplifier. The control signal (e.g., ±10 V) is input to the amplifier, which then drives the solenoid coil.

   • Flow Limitation:​ This valve is not a main system relief valve​ for high flows. It is typically used as a pilot valve for larger cartridge valves or for precise pressure control in small circuits. Exceeding the 2 L/min flow rating will cause excessive pressure override.

   • Return Line Pressure:​ Port T (return) must be connected directly to tank with minimal backpressure. High backpressure will directly reduce the effective setting pressure (P_set = P_solenoid - P_T).