A directional valve symbol shows connections and states rather than a physical cross-section. Reading it systematically helps turn a broad request such as 'a reversing valve' into a precise functional specification.

Count positions and connections

Each adjacent box represents a possible switching position. The external connection lines identify ports. Arrows show connected flow paths; a blocked end indicates a closed path in that position. Do not read all boxes as simultaneous connections.

Identify the normal state

Springs, actuators and detents show how the valve changes or maintains position. A spring-centered valve and a detented valve can behave differently after a control signal is removed. Confirm the manufacturer's definition of the de-energized state for the complete assembly.

Trace the actuator movement

For each position, follow pressure supply to the actuator and the return path back to tank. Then examine neutral behavior. This exercise reveals whether the symbol supports the intended extend, retract, float or stop function, but it does not establish leakage performance or a safety rating.

Practical checklist

• Mark the normal and energized positions on the drawing.
• Trace a complete supply and return path for each movement.
• Record any detent, spring or manual-override requirement.

Discuss your application

Explore related hydraulic products, or send JIUDING your model code and application details. Include the circuit drawing and the operating conditions relevant to the checks above so the required configuration can be reviewed.

Cover image: AI-generated editorial illustration, not a model-specific product drawing or a photograph of a JIUDING facility.