Direction control valve Hydraulic control valve is one of the most important and basic components of a hydraulic system. The directional control valve includes spool valves and seats. In all systems, this hydraulic valve is available and its function is to direct the flow to the intended direction. This hydraulic valve is usually made of a spool or site inside a body and can It can have mechanical or electrical control. The directional control valves are shown by a number of connected squares, each of which is called a position. The number of squares does not indicate the number of positions of the valve. The flashes inside the squares indicate the direction of flow. The vertical, horizontal and diagonal lines do not indicate how the valve openings are connected at the time. The name of the valve depends on the position and number It has mouths. When disabling directional control valves, it is necessary to first state the number of openings and then the number of positions. Pressure control valves are devices in hydraulic systems that can be used to determine, limit or reduce system pressure. These valves protect the system against sudden changes in pressure. These unintended changes in pressure may be caused by a decrease in flow rate or an unintended increase due to the valves opening and closing. Pressure breaker valves, pressure reducer, sequence, pressure relief, brake and neutralizer, control gradual and constant pressure in hydraulic systems. Sudden changes can cause a sudden increase in pressure up to 4 times the normal pressure in the system and that is why. The use of pressure control devices in any hydraulic circuit is essential. Hydraulic components such as vibration absorbers are used to even out the pressure or suffocate the resulting hopper in hydraulic systems. ﯾﻦ ﺷﯿﺮﻫﺎ ﻣﻨﻈﻮ ﻣﻨﻈﻮر ﮐﻨﺘﺮل ﺟﻬﺖ ﺣﺮﮐﺖ ﻣﺼﺮف ﮐﻨﻨﺪه ﻫﺎ و ﻫﻤﭽﻨﯿﻦ ﺗﻮﻗﻒ آﻧﻬﺎ ﻣﻮرد اﺳﺘﻔﺎده ﻗﺮار ﻣﯿﮕﯿﺮﻧﺪ.ﻗﻮاﻧﯿﻦ زﯾﺮ ﺟﻬﺖ ﻣﻌﺮﻓﯽ ﺷﯿﺮﻫﺎی ﮐﻨﺘﺮل ﺟﻬﺖ ﺑﮑﺎر ﮔﺮﻓﺘﻪ ﻣﯿﺸﻮﻧﺪ ﻣﯿﺸﻮﻧﺪ: