Every hydraulic system has a minimum number of basic components regardless of its design and function. The basic components of the hydraulic system include pump, tank, directional valve, check valve, pressure relief valve, selector valve, actuator and filter. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get Original Essay An open-center system has fluid flow, with any pressure in the system when the actuation mechanisms are inactive. The pump disperses the fluid from the tank through the selector valves and returns it to the tank. The open-center system may involve several subsystems, with a selector valve for each subsystem. The selector valves of the open center system are connected in series with each other. In this arrangement, the system pressure line will pass through each selector valve. The fluid is allowed free passage through the selector valve and back to the reservoir until one of the selector valves is ready to operate a mechanism. When one of the selector valves is set to operate an actuating device, fluid flows from the pump through one of the working lines to the actuator. When the selector valve is set to this position, fluid flow to the reservoir is blocked. The system overcomes the resistance using the pressure built up inside it and moves the piston of the actuation cylinder, the fluid from the opposite end of the actuator returns to the selector valve and returns to the tank. System operation after component activation will depend on the type of selector valve used. Many types of selector are used along with the open center system. One of the types is both manually activated and manually deactivated. The valve is manually moved to an operating position. Then, the actuation mechanism reaches the end of the operating cycle and pump delivery continues until the pressure is released by the system safety valve. The safety valve is dismantled and allows the fluid to return to the tank. The system pressure remains at the relief valve setting until the selector valve is manually returned to the neutral position. Reopens open-center flow and lets system pressure drop to line resistance pressure.