Dual Overcenter Valves: Superior Control for Precision Engineering
Balancing valves play an indispensable role in the hydraulic systems of construction machinery and various other mechanical forms that rely on gravity for operation. These valves feature a sophisticated hydraulic circuit designed to balance the return oil back pressure with the changing load. This ensures reliable load stoppage at a precise position and provides seamless control over movement balance during load lowering. By preventing excessive descent speeds, they safeguard structural components, hydraulic parts, and pipelines from potential damage.
Overcenter valves are critical for managing and controlling the stop and motion of an actuator. Single overcenter valves govern one direction, while dual overcenter valves manage both directions, offering unparalleled precision and reliability.
Key Functions:
- Load Lowering Control: The load will only lower if there is a pilot pressure from the opposite line. This crucial function ensures the oil supply to the cylinder, effectively preventing cavitation issues.
- Pressure Containment: These valves maintain pressure at a pre-set value and provide pressure relief for peaks caused by shocks or overloads.
- Flow and Load Arrest: When the pump is inactive or the directional valve is in a neutral position, the valve arrests both flow and load.
- Free Flow for Load Lifting: This feature ensures smooth load lifting with minimal pressure drops, enhancing operational efficiency.
Components housed within include:
- Check Valve: This component only permits flow in a single direction, ensuring unidirectional fluid movement.
- Pilot Piston: It allows for the gradual and controlled opening of the relief valve, facilitating smooth operation.
- Relief Valve: This vital component limits the maximum pressure within the actuator, securely withholds the load, and manages its descent during valve opening initiated by the pilot signal.
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