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Goat Industries Filter Farm 750

The filtration unit itself can be composed of cylindrical cartridges of different micron ratings. The one shown, the Filter Farm 750, has four cartridges plumbed in parallel and served by an air operated pump. These systems are generally low pressure devices and it is important not to exceed the rated pressure of the cartridges, some of which are as low as 0.8 bar. The pressure can be regulated very easily with the type of pump used, ensuring that the cartridges do not become distorted and leaky.

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The waste oil can be heated to about 40 degrees C for faster flow through the unit, but again, care should be taken as the cartridges are even more prone to failure when hot. A post filter is used in this design to filter out finer particles and as insurance that the main filters are working properly. The performance of the machine can be monitored by pressure gauges positioned at different points in the plumbing and the speed at which the pump is operating.