DG20S4-012F-50-S553

The DG20S4-012F-50-S553 valve is part of the Directional Control Valves series produced by Vickers for hydraulic automation in machinery where precise actuator motion is required. It employs a 4-way flow path so the spool can alternate pressure and return lines between two work ports, enabling both extension and retraction of cylinders. The valve is dimensioned to the D05 size, which matches common porting layouts for medium-capacity circuits. A subplate or manifold mounting style permits quick removal without disturbing pipe runs, while the ISO 4401-05 (NFPA D05) interface standardizes bolt patterns and port locations to simplify interchange with other compliant components.

The unit accommodates flow rates up to 20 gpm (76 l/min), allowing it to service pumps that supply moderate volumes without excessive pressure loss. Pressure capability on the P, A, and B ports reaches 3000 psi (207 bar), giving headroom for systems that demand high clamping or lifting forces. The T-port is limited to 1000 psi (70 bar), so return line backpressure must be controlled to remain within this threshold for reliable spool centering and seal life. These ratings define the operational envelope of the valve and guide designers in matching pump output and cylinder requirements to maintain stable, leak-free performance.