KBHDG4V38XM1PH711

The KBHDG4V38XM1PH711 directional control valve is produced by Vickers as part of the Directional Control Valves series. It directs hydraulic fluid in automated machinery where electronic control over spool position is required. The valve mounts on an ISO 4401 size 03 (D03) interface, permitting drop-in replacement for standardized subplates. A port P, A, or B pressure rating of 350 bar allows the unit to handle high-pressure circuits common in industrial presses and injection machines. The on-board electronics run from a 24 V DC power supply, simplifying wiring to common control cabinets. Control signals are received through a ±10 V DC command input, enabling proportional actuation from typical motion controllers. The electronics draw up to 3 A, so fuse sizing and power budgeting must accommodate that maximum supply current. Internal modulation operates at a 10 kHz PWM frequency, which reduces dither noise and improves spool stability. A threshold command voltage of 0.25 V defines the minimal usable input level, while a 17 ms 0–100 percent step response supports rapid pressure or flow changes.

The valve body carries an IP67 ingress protection rating, so it withstands wash-down and temporary immersion without compromising the coil or electronics. Reliable function is ensured at ambient temperatures between 0 °C and 70 °C, allowing installation in unconditioned factory areas. Hydraulic stability is maintained when oil temperature stays within the same 0 °C to 70 °C range, matching the mechanical clearances of the spool to fluid viscosity. A ±10 V DC monitor signal is available at pin F, giving feedback to the PLC about actual spool position or driver status. The electronics enable operation once the supply line reaches 8.5 V, preventing unintended motion during power-up. Conversely, the driver disables the valve when the supply drops to 6.5 V, ensuring consistent shutdown behavior during brownouts. These voltage windows guard against erratic actuation and complement the earlier command threshold for precise hydraulic automation.