DG5V-H8-3C-7-T-P2-T-80-JA429

The DG5V-H8-3C-7-T-P2-T-80-JA429 valve is produced by Vickers in the DG5 Two-Stage Directional Valves series for hydraulic automation circuits that require controlled flow direction. It uses a closed P and B, open A to T center condition so the pump and B port are blocked while A port exhausts to tank in neutral, preventing unwanted actuator movement during standby. A spring centered spool returns the valve to its neutral position automatically when pilot pressure is removed, ensuring predictable fail-safe alignment. The unit incorporates plain manual overrides at both ends so maintenance technicians can shift the spool mechanically during setup or loss of pilot supply. An ISO 4401-08 (NFPA D08) mounting pattern allows direct installation on standardized subplates without custom machining. Internal pilot drainage routes pilot flow back to tank through internal passages, eliminating the need for a separate external drain line. Stroke adjustment is available at the A-port end only, letting the user fine-tune spool travel to balance actuator speed with system demands.

For throughput sizing, the valve supports a flow capacity of 170 L/min (45 USgpm) at 210 bar, giving reliable performance at typical system pressure. Recommended operating flow is 265 L/min (70 USgpm), which matches the pilot stage dynamics and minimizes pressure drop across the main spool. The design tolerates up to 380 L/min (100 USgpm) at 210 bar without malfunction, providing headroom for transient surges. Pilot sections can be supplied with pressures up to 310 bar (4500 psi), enabling responsive shifting even in high-pressure circuits. Ports P, A, and B are rated for the same 310 bar limit so full system pressure can be routed through any working line. The tank line withstands 210 bar (3000 psi), allowing back-pressure-laden returns without jeopardizing housing integrity.