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Write 7 pages thesis on the topic chemical safety: relief valves. All the circuits with fixed volumes usually need a relief valve for the system protection against excess pressure. The fixed-volume pu
Write 7 pages thesis on the topic chemical safety: relief valves. All the circuits with fixed volumes usually need a relief valve for the system protection against excess pressure. The fixed-volume pumps are meant to move fluids whenever they are turning. There’s no problem with the fluid movement especially when either pump unload through an open-center circuit or the actuators are in a movement. A relief valve becomes essential when the actuators stall with the directional valve in a still shifted position. There are systems that can run without relief valves such as the pressure compensated pump circuits. However, this is possible because such circuits are only prompted to move when the pressure goes down below the compensated settings. In an electrical system, relief valves can be compared to a fuse. In such a system, it is common that when the circuit amperage does not exceed the fuse amperage, all remains well (ASME 61). However, when the circuit amperages try to go beyond the fuse amperage, the fuse will be prompted to blow in a bid to disable the circuit. It can therefore be concluded that, both the fuse and relief valve function by protecting the system from excess pressure to keep it below the preset level. The only difference between the two devices is that an electrical circuit must be reset when the fuse blows and must be maintained to allow the machine to circle once again. It usually happens this way, especially in case of a problem should be sorted out before the system starts working again. On the other hand, relief valves in the hydraulic system, open and bypass the fluid whenever the pressure goes beyond the preset level. After the pressure falls, the valve will automatically close the gain.
It is important for many fixed-volume pump circuits t to have the bypassing capability of the relief valve during the circle as some also have the bypassing during the idle time according to design, it is common that when a circuit is designed well, it does not bypass a fluid unless in the case of a malfunction. .
