The selection of catering oil-water separator depends on the business license of the manufacturer of catering oil-water separator, product inspection report and other related materials. Secondly, look at the working principle of the oil-water separator, the raw materials used and the brands of related accessories. Modern people are getting higher and higher in the level of decoration. They want to buy the best things, and they want to try them at the sales site first. Why? I am afraid that the treatment effect will not be achieved, and the quality will not pass! Therefore, the second item of oil-water separator is the separation principle and material of oil-water separator. There are many principles for oil-water separator to realize oil-water separation. Generally, it can be divided into physical principle separator and chemical principle separator. The physical separation method includes gravity separation, centrifugal separation, filtration separation, etc., and the chemical separation method includes medicament separation and flocculant separation, etc. Choose according to your processing accuracy and actual situation. Generally, gravity separation method is used in oil-water separators in industries, processing industries and drinking kitchens where the processing accuracy is not particularly high. Centrifugal separation method is generally selected for places with high processing accuracy. Look at the material of oil-water separator. At present, there are stainless steel, FRP, cast iron, aluminum, food-grade resin or PVC in the market. The first three are materials with good compression resistance. Among these materials, stainless steel has the best compression resistance and corrosion resistance. The price is also relatively high, and food polar resin or PVC has poor pressure resistance and relatively low price, so it is generally not suitable for selection. Article 3: Understand what functions the oil-water separator realizes and whether it is suitable for your own needs. For oil-water separators, there are power-free oil-water separators and automatic oil-water separators. Unpowered oil-water separator generally needs simple manual maintenance for occasions with small throughput. But the biggest advantage is that the oil-water separation effect can be achieved without connecting electricity, saving energy and reducing emissions, which is in line with the environmental protection concept of today's society. Automatic oil-water separator needs no manual maintenance. Automatic drainage, automatic slag discharge, automatic detection of oil-water interface oil discharge. The advantage is that it does not need manual maintenance and can realize visual monitoring function. If installed in the basement, it needs to have lifting function.