Vickers | KBFDG4V-3-33C20N-Z-PC7-H7-10
KBFDG4V-3-33C20N-Z-PC7-H7-10
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The KBFDG4V-3-33C20N-Z-PC7-H7-10 valve is designed for electrohydraulic direction control in industrial automation. It belongs to the Directional Control Valves series and is manufactured by Vickers. The unit mounts on an ISO 4401-03 (ANSI D03) interface so it can replace standard subplate valves without modification. Its 33C20N spool passes up to 20 L/min, providing moderate flow capacity for compact circuits. The pressure rating of 350 bar on ports P, A, and B lets the valve handle high-pressure supply lines, while the T port withstands 105 bar return pressure. The on-board electronics run from a 24 V DC supply and may draw up to 3 A during peak actuation. A 7-pin PC7 connector brings in power and command signals, and the Z code indicates there are no manual overrides, so all shifting is electrical.
The valve body weighs 3.1 kg, a mass suitable for manifold or subplate mounting without additional support. Environmental sealing meets IP65/IP67, guarding the electronics against dust and water spray. The drive stage is modulated at a 10 kHz PWM frequency, allowing fine current control to the solenoids, which contributes to a 17 ms step response from 0 to 100 percent stroke. Feedback is available as a ±10 V DC monitor output for remote status checking. To protect the input card, the common-mode voltage on pin B is limited to 18 V and the differential command voltage between pins e and d must not exceed 100 mV. Pin C is left unconnected, preventing accidental tie-backs to ground or supply. Together these electrical limits coordinate with the mechanical ratings presented earlier to deliver stable, repeatable spool positioning in closed-loop hydraulic systems.
Technical Specifications
Common-mode Voltage (pin B)
18 V (max)
Differential Voltage (e-d)
100 mV (max)
Electrical Connection
7-pin Connector (PC7)
Manual Overrides
None (Z)
Mass
3.1 kg
Max Port T Pressure
105 bar (1500 psi)
Max Supply Current
3 A
Monitor Signal Output
±10 V DC
Mounting Interface
ISO 4401-03 (ANSI D03)
Pin C Function
Not Connected
Pressure Rating (ports P, A, B)
350 bar (5000 psi)
Protection Rating
IP65/IP67
Pwm Frequency
10 kHz
Spool Flow Rating (33c20n)
20 L/min
Step Response (0–100%)
17 ms
Supply Voltage
24 V DC
1620 Old Apex Road
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