A comprehensive comparison of domestic and imported magnetic pumps

This is a very difficult task; I’m only talking about non-metallic magnetic pumps here. First, let’s talk about pumps with pure plastic pumps. Among domestic options, there are two materials: PP and fluoroplastic F. The maximum power level for such pumps is around 3.7 kW, and their temperature resistance is generally around 80–100 degrees Celsius. It is not recommended to use these pumps in environments with particles present. There are numerous domestic brands; you can find them easily with just a quick search online. There’s little to say about PP material – most of it is black, and that’s because it’s reinforced with mixed fibers; otherwise, as we all know, PP is a very soft material. In China, fluoroplastics generally consist of PTFE (polytetrafluoroethylene) and PVDF (polyvinylidene fluoride). Their advantages are well-known: they exhibit excellent corrosion resistance. PTFE has better corrosion resistance and temperature tolerance than PVDF, while PVDF has higher strength than PTFE. However, PTFE is a material that cannot be processed by injection molding; therefore, pump heads made of PTFE are usually manufactured through machining, which results in poor surface finish and low efficiency of the pumps produced. Speaking of imported magnetic pumps, they are generally available in PP and fluoroplastic materials; their power can reach up to 5.5 kW, they can withstand temperatures of around 80/120 degrees, and they can handle 10–15% solid particles. The main imported brands are Yiweichi from Japan, Ansimag from the United States, Richter, and Xieci from Taiwan (I work for this company). There are many other brands as well, but in terms of sales volume, it’s these few brands that dominate; moreover, many of them are OEM products. In terms of material, there is no significant difference between PP; the main difference lies in the precision of processing. Fluoroplastics are of key importance. ETFE (ethylene tetrafluoroethylene) is a new type of fluoroplastic developed by the American company DuPont in the 1980s; this material combines the chemical properties of PTFE with the physical properties of high-strength plastics. (The exterior walls of the Water Cube are made of this material.) This material can be processed by injection molding, making it suitable for mass production, and it also offers high precision in processing. Basically, the fluoroplastics used by these brands are supplied by a few key companies: DuPont in the United States, and Asahi Glass (or Daikin) in Japan. In Europe and the United States, American-made materials are used, while in Japan and Taiwan, Japanese-made materials are employed. DuPont’s magnetic therapy products are of relatively low quality, which is why they are more commonly used in the chemical industry. Japanese materials, on the other hand, are of higher purity, which is why they are more frequently used in the semiconductor and electronics industries; they can also be used in the chemical industry. However, many chemical plants require compliance with the SB standard for APIs, making it difficult to use these materials there – only auxiliary applications without many advanced functions are possible. The delivery time for pumps made from this material is a problem. Since this material can be used in the production of biochemical weapons, the imperialist powers of the United States and Japan convinced some developed countries in Australia back in 1989 to impose restrictions on the export of this material to countries in the third world such as China; an export approval process is required, and this situation continues to this day. But it’s also different from **with**; Japan enforces strict regulations in this regard, so the delivery time for a fluoroplastic magnetic pump in Japan is at least 4 months, and in some cases it takes up to 8 months before it can be delivered. The United States is too far away; just the shipping takes over a month, and when the production time is added in, it’s about 4 months in total. Here’s the key point: Taiwan is very different. Internationally, Taiwan is not recognized as a country, but rather as a region; therefore, export restrictions do not apply there. As a result, the delivery time is much shorter. Generally, the production period takes one month, and the shipping time takes half a month, so the total delivery time is at most two months, and it can even be sooner. Now, regarding pumps with linings, both domestic and imported ones are the same; they all have fluoroplastic linings. Using PP material as a lining is simply not worthwhile. Domestically produced products generally use the rotational molding process; I’m not very familiar with this process, but I know that the fluoroplastic lining is relatively thin, and that the lining layer is integrated with the cast iron shell, seemingly unable to be separated. The imported lining layer is also injection-molded, and it can be completely separated from the cast iron casing. American Ansimag should produce pumps that only have linings, mainly for use in large-scale chemical projects. I am not aware of the maximum flow rate for domestically produced liner pumps; I have some information on imported ones. Japanese brand Eiwich can now achieve a power output of 75 kW with a maximum flow rate of 300 liters per hour. Taiwanese brand Xieci can currently only reach 18.5 kW, with a maximum flow rate of 100 liters per hour. By the end of the year, a pump with a maximum power output of 45 kW and a flow rate of up to 240 liters per hour will be released. The maximum capacity of Ansimag in the United States is 280 liters per hour. Reicht is more or less the same. Another difference is that the pump shafts of EWICH and Xiemag are available in ceramic and SiC materials, while the bearings are available in graphite, ceramic, and SiC materials. The other wear rings are available in ceramic, graphite, RULON, and SiC materials, with different combinations used depending on the type of medium. In the US, ANSIMAG is only available in SiC material. That’s about it. If you want detailed information on coercivity, you can add me on QQ at 154983006 to discuss it in detail. It’s really tiring~~~~~~~~