KDG4V533C50NHMUH730

The KDG4V533C50NHMUH730 valve is produced by Vickers for the KDG Non-feedback Proportional Valves series. It regulates hydraulic actuators in industrial automation where proportional flow control without position feedback is acceptable. The unit follows a single-stage design, which simplifies internal architecture and shortens response time. A subplate mount allows rapid replacement without disturbing pipework. The interface adheres to ISO 4401-05 / NFPA D05 / CETOP 5 / NG10 patterns so it can fit common manifolds. Meter-in and meter-out metering enable independent control of acceleration and deceleration in both flow directions. The spool is configured with P blocked and A and B ports connected to tank, providing fail-safe unloading when the coil is de-energised. Maximum working pressure is 315 bar to match high-pressure pump circuits, while the tank port rating of 210 bar protects return lines from excessive back-pressure.

A rated flow of 50 L/min is available at both A and B ports, giving symmetrical performance for bidirectional cylinders. The coil operates on 24 V DC so it can be driven directly by standard machine control power supplies. An ISO 4400 (DIN 43650) electrical connector provides quick disconnection during maintenance and ensures correct pin orientation. The water-resistant manual override lets technicians shift the spool during commissioning without energising the solenoid. Operating temperature spans from −20 °C up to 70 °C, supporting equipment that works outdoors or in warm factory environments. Symmetrical flow capability maintains equal extension and retraction speeds, which simplifies circuit design. Such environmental tolerance minimises downtime in mobile or stationary machinery that encounters seasonal temperature swings. Uniform port capacity also avoids pressure surges when the command signal crosses zero.