DG5S4064N51

The DG5S4064N51 valve is part of the DG5 Two-Stage Directional Valves series manufactured by Vickers for hydraulic automation circuits that require controlled flow routing. Its pilot-operated actuation uses a small control stage to shift the main spool, reducing the effort needed from external controls. The four-way flow path provides pressure and return lines to two work ports so cylinders or motors can be driven in both directions. A tandem-center spool with a closed crossover holds the service ports closed in neutral to minimize load drift while letting the pump flow unload. The design manages up to 45 gpm, allowing medium-capacity systems to cycle without excessive pressure loss. Subplate or manifold mounting lets the valve sit directly on standard pattern bases to simplify plumbing and replacement.

The unit works with petroleum oils, aligning with typical industrial hydraulic fluids. System pressure can reach 3000 psi (210 bar), and the pilot supply may also be taken up to the same 3000 psi so the control stage never becomes a limiting factor. Operation is reliable from -20 °C to 70 °C, covering most mobile and factory environments without extra conditioning. A no-spring detented arrangement holds the spool in its last commanded position until pilot pressure shifts it again, preventing unplanned movement when the control signal disappears. The two-stage layout keeps the main flow path isolated from the pilot gallery, which helps maintain responsiveness even at maximum pressure. These characteristics let the valve direct hydraulic power precisely while fitting into compact subplate or manifold blocks.