Fundamentally Different Operating Principles
Flow dividers and directional control valves act like two distinct "stewards" within a hydraulic system, each with a unique temperament:
Flow Divider: Focuses on flow distribution, splitting the fluid output from the pump into multiple channels according to a specific ratio (e.g., 70% to Motor A, 30% to Motor B). This is ideal for scenarios requiring synchronized movement.
Directional Control Valve: Acts more like a traffic controller; by shifting its spool, it controls the opening and closing of various fluid paths, allowing for the independent or combined operation of multiple actuators.
Comparison of Application Scenarios
The choice of valve depends entirely on your equipment's specific requirements:
Flow Dividers for Motors: Commonly found in the travel drive systems of construction machinery, ensuring that the rotational speeds of motors on both sides remain synchronized to prevent the vehicle from veering off course.
Directional Control Valve Systems: Better suited for equipment-such as excavators-that requires independent control over multiple sets of hydraulic cylinders (e.g., allowing the boom and bucket to operate separately).
Hybrid Systems: Advanced machinery may be equipped with both types of valves; the flow divider handles components requiring high precision, while the directional control valve manages complex, multi-axis movements.
A Guide to Avoiding Pitfalls When Selecting Valves
Three key criteria to help you make the right decision:
Synchronization Requirements: Choose a flow divider if strict synchronization is required; opt for a directional control valve if asynchronous operation is acceptable.
Space Constraints: Flow dividers feature a compact structure, whereas directional control valves typically require more extensive hydraulic plumbing connections.
Cost Control: For simple synchronization systems, using a flow divider is more economical; for systems involving complex movements, one must accept the higher cost associated with directional control valves.
