Pressure control valve Hydraulic pressure control valves have a variety of applications, such as: • Keeping the maximum oil pressure constant in the system • Adjusting the oil pressure for branches of the system that require less pressure. Common features of different types of pressure control valves: • These valves operate on the basis of the balance between oil pressure and spring force. • These valves are in the group of valves with "unlimited condition". • These valves are common , Or categorize their connection type either by their size and capacity or by the range of their operating pressure. • These valves are named based on their function, such as "pressure breaker valve", "sequential valve", "cut-off valve" Streamer ”and the like. There are two very important groups between them, which are: a) Pressure-breaking valves that close with spring force and open with oil force. B- Pressure-reducing valves that open with spring force and close with oil force. • All pressure control valves are of the "two-way" valves and are always in their normal and inactive state or "complete package" or "full open". Pressure control valves are devices in hydraulic systems that can be used to determine the system pressure, Limited or reduced and generally the system pressure is affected by them. This type of valve protects the system against sudden changes in pressure. These unwanted changes in pressure may be due to a decrease in flow rate or an unwanted increase due to the opening and closing of the valves. To be created. 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 equalize the pressure or suffocate the resulting arc in hydraulic systems.