First, pay attention to the oil yield or residual oil rate The oil yield of the oil press is equal to the oil content of the oil minus the residual oil rate of the machine. The oil yield is often different with different materials, but in the comparison of the same oil crops, in terms of the oil yield, according to the material and process of the manufacturer, the higher the oil yield, the lower the residual oil rate. The oil press is the better oil press; second, the level of automation function or the scope of application, and the amount of applicable materials are also a major test for oil press manufacturers. Third, after-sales oil presses only have industry standards, not national standards. As a result, the accessories of the oil press are often not universal, and it is necessary to choose a company with a physical factory and a relatively complete after-sales service. Henan Huatai Cereals and Oils Machinery supply edible oil processing machine, any need please email to info01@cnoilmachine.com