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The KDG4V333C30XHMUH760 proportional valve belongs to the KDG Non-feedback Proportional Valves series and is manufactured by Vickers for automated hydraulic control. The unit installs on a subplate, allowing maintenance without disturbing pipework, and follows the ISO 4401-03 (NFPA D03, CETOP 3) interface to ensure interchangeability with standard manifolds. Its spool is arranged as P blocked with A and B bled to T so the centered position unloads actuator ports. A 24 V DC solenoid matches common machine power supplies; the coil presents a resistance of 7.3 Ω at 20 °C to limit steady-state current and an inductance of 20 mH at 1000 Hz to reduce electromagnetic noise. A peak rating of 1.6 A at 50 °C defines the maximum drive signal without overheating, while a 100 % duty factor permits continuous energized service.
Wiring is completed through an ISO 4400 (DIN 43650) connector to keep assembly time low, and an IP65 enclosure prevents dust ingress and resists water jets for reliable field service. A water-resistant manual override lets technicians shift the spool during commissioning or power loss. Working ports P, A, and B withstand 350 bar to suit high-pressure actuators; the four-way flow path can experience up to 210 bar pressure drop, and the tank line is rated for 210 bar so return flow can be restricted without damage. Dynamic behavior is characterized by a 25 ms step response for a 0-to-100 % command and a 30 ms return from 100 to 0 %, minimizing overshoot during fast control cycles.
Coil Inductance (h, 1000 Hz)
20 mH
Coil Max Current (h, 50°c)
1.6 A
Coil Resistance (h, 20°c)
7.3 Ω
Coil Voltage
24 V DC
Duty Factor
100% ED
Electrical Connection
ISO 4400 (DIN 43650)
Manual Override
Water-Resistant
Max Pressure (p,a,b)
350 bar
Max Pressure Drop (4-way)
210 bar
Max Tank Pressure (t)
210 bar
Mounting Interface
ISO 4401-03 (NFPA D03, CETOP 3)
Protection Class
IP65
Spool Type
P Blocked, Bleed A & B To T
Step Response 0-100%
25 ms
Step Response 100-0%
30 ms
Valve Mount Type
Subplate
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