During operation, an external drive mechanism rotates the drive shaft, which in turn drives the rocker arm, actuating the valve plate. This causes the working fluid to flow periodically from the left inlet to the lower outlet of the valve, and vice versa, achieving the purpose of periodically changing the flow direction.
This type of valve is widely used in petroleum and chemical production, and is most commonly used in synthetic ammonia gasification systems. In addition, directional control valves can also be made with a disc-type structure, which is mostly used in applications with smaller flow rates. During operation, simply turning the handwheel changes the flow direction of the working fluid through the disc.
It offers accurate operation, a high degree of automation, and stable and reliable operation, but requires an auxiliary drive and cooling system, resulting in a more complex structure. The disc-type structure is simpler and is mostly used in production processes with smaller flow rates.
In industries such as petroleum, chemical, mining, and metallurgy, the six-way directional control valve is an important fluid switching device. This valve is installed in the pipelines transporting lubricating oil in thin oil lubrication systems. By changing the relative position of the sealing components in the valve body, the various channels of the valve body can be connected or disconnected, thereby controlling the reversal and start/stop of the fluid.
