Hydraulic power machines need hydraulic fluids to make it function and do the required task to do. These hydraulic fluids should be controlled because too much will not be good for the machine as possible leaks and too much pressure may be built on the machine. Too less can lead to dryness of the machine. A proper control should be made on the flow of the hydraulic and it is properly controlled by the hydraulic valve. Choosing the correct valve is crucial for the machines and proper consideration should be made before making a choice.