The working of a Hydraulic system starts when the liquid medium is introduced in to the machine. This liquid goes through the machine parts directed by the flow control valves within the machine. Once it reaches all parts, the process starts and machine is set in motion. As the process proceeds, the heat generated starts increasing which is kept under control by the pressure valves enabling the machine to function smoothly. For Trident Hydraulic valves,pumps & power unit – please visit their official website