Vickers | KBFDG4V-5-2C50N25-Z-M1-PC7-H7-12-EN143
KBFDg4V-5-2C50N25-Z-M1-PC7-H7-12-EN143
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The KBFDg4V-5-2C50N25-Z-M1-PC7-H7-12-EN143 electrohydraulic directional control valve is produced by Vickers within the Directional Control Valves series. It governs spool position in hydraulic circuits for precise motion control. The valve accepts a ±10 V DC command signal, allowing proportional positioning across its range, while needing at least 0.25 V at the input to overcome the threshold. Its internal electronics operate from a 21–36 V DC supply and can draw up to 3 A during peak demand. A common mode voltage limit of 18 V protects the differential amplifier against excessive ground offsets. Pulse-width modulation at 10 kHz drives the solenoids to minimize dither. Continuous operation is possible because the drive stage supports a 100% duty cycle. The electrical interface is a 7-pin connector supplied without a mating plug, and pin C remains unpowered in this configuration as it is not connected.
For closed-loop regulation, the valve employs an LVDT to sense spool displacement, and the electronics present a ±10 V DC position monitor output with a 10 Ω source impedance for direct connection to controllers. The feedback circuit maintains differential voltage between coil D and terminal e below 100 mV, ensuring balanced drive currents. Housing seals provide IP65 and IP67 ingress protection so the assembly withstands dust and water spray encountered on mobile or industrial power units. The design remains stable across oil temperatures from 0 to 70 °C, protecting elastomers and maintaining consistent viscosity. These environmental capabilities, together with continuous current capability and the unused enable path, allow the valve to deliver reliable directional control in hydraulic automation systems that require real-time position feedback and rugged field installation.
Technical Specifications
Command Input
±10 V DC (M1)
Common Mode Voltage Limit
18 V
Duty Cycle
100% (ED)
Electrical Connection
7-Pin Connector (No Plug)
Enable Pin C
Not Connected (PC7)
Feedback Type
LVDT Spool Position
Ingress Protection
IP65/IP67
Max Differential Voltage D–e
100 mV
Max Supply Current
3 A
Monitor Output Impedance
10 Ω
Oil Temperature Range
0–70 °C
Position Monitor Output
±10 V DC
Pwm Frequency
10 kHz
Supply Voltage Range
21–36 V DC
Threshold Command Voltage
0.25 V
1620 Old Apex Road
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