Fluorine plastic magnetic pump with motor direct-connected structure, supported by the middle bracket, compact structure, easy disassembly and maintenance, the use of high-performance magnetic materials, "NdFeB" manufacturing internal and external magnets, isolation sets of imported non-metallic materials , Completely eliminate the general eddy current loss of magnetic pump can deliver high concentration, density greater than 1.84t / m3 of strong corrosive media, the product is good, but also have to use on the place, let me introduce you to the following about how to choose Buy fluorine plastic magnetic pump it. How to buy fluorine plastic magnetic pump First, the selection of fluorine plastic pump should consider the following questions: 1, corrosion resistance: For a long time, corrosion is one of the most troublesome chemical equipment hazards, a little careless, ranging from damage to equipment, Heavy cause accidents and even lead to accidents. According to the statistics, about 60% of the destruction of chemical equipment is caused by corrosion. Therefore, the selection of chemical pumps should first pay attention to the scientific material selection. There is often a misunderstanding that stainless steel is a "universal material," no matter what the media and environmental conditions are held out of stainless steel, which is very dangerous. The following for some common chemical media to talk about the selection of the main points: 1) Sulfuric acid: As a strong corrosive medium, sulfuric acid is a very broad use of important industrial raw materials. Different concentrations and temperatures of sulfuric acid on the corrosion of materials vary greatly, for the concentration of more than 80%, the temperature is less than 80 ℃ of concentrated sulfuric acid, carbon steel and cast iron has good corrosion resistance, but it is not suitable for high-speed flow of sulfuric acid, Not suitable for pump valve material; common stainless steel such as 304 (0Cr18Ni9), 316 (0Cr18Ni12Mo2Ti) sulfuric acid medium is also limited use. Therefore, the delivery of sulfuric acid pump valve is usually made of high silicon cast iron (casting and processing difficult), high alloy stainless steel (No. 20 alloy) manufacturing, but its processing is difficult and expensive, so people are not optimistic. Fluoroplastics alloy has very good resistance to sulfuric acid. It is the patented material of Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences. Our company introduced the patented technology in 1985 and the earliest use it to develop and produce corrosion-resistant chemical pump. After the experiment of the Chinese Academy of Sciences, No chemical medium has yet been found to react with it over the applicable temperature range, so using a fluorine-based pump (F46) is a more economical option. Company products are: CQB fluorine plastic magnetic pump, IMD lining fluorine magnetic pump, IHF lined fluorine centrifugal pump, FSB fluorine alloy centrifugal pump. 2) Hydrochloric acid: Most metal materials are not resistant to hydrochloric acid corrosion (including a variety of stainless steel materials), molybdenum high ferrosilicon can only be used for 50 ℃, 30% hydrochloric acid. In contrast to metallic materials, the vast majority of non-metallic materials have good corrosion resistance to hydrochloric acid, so lined rubber pumps and plastic pumps (such as engineering plastics, fluoroplastics, etc.) are the best choice for the delivery of hydrochloric acid. Company products are: CQB fluorine plastic magnetic pump, IMD lining fluorine magnetic pump, IHF lined fluorine centrifugal pump, FSB fluorine alloy centrifugal pump, UHB polyethylene centrifugal pump. 3) Nitric acid: most of the common metals are rapidly corroded in nitric acid, stainless steel is the most widely used nitric acid-resistant material, all concentrations of nitric acid at room temperature have good corrosion resistance, it is worth mentioning that the stainless steel containing molybdenum ( Such as 316,316L) nitric acid corrosion resistance not only not superior to ordinary stainless steel (such as 304,321), sometimes even worse. For high temperature nitric acid, usually using fluorine plastic alloy material. Company products are: CQB fluorine plastic magnetic pump, IMD lining fluorine magnetic pump, IHF lined fluorine centrifugal pump, FSB fluorine alloy centrifugal pump. 4) Acetic acid: It is one of the most corrosive substances in organic acids. Ordinary steel will be seriously corroded in all concentrations and temperatures of acetic acid. Stainless steel is an excellent acetic acid-resistant material. Molybdenum-containing 316 stainless steel is also suitable for high temperature And dilute acetic acid steam. For high temperature and high concentration of acetic acid or other corrosive media containing harsh requirements, the choice of high-alloy stainless steel or fluorine plastic pump. Such as CQB fluorine plastic magnetic pump, IMD lining fluorine magnetic pump, IHF lining fluorine centrifugal pump, FSB fluorine alloy centrifugal pump. 5) Alkali (Sodium Hydroxide): The general corrosivity is not very strong, but the common alkali solution will produce crystallization. Therefore, the IHF lined fluorine centrifugal pump and FSB fluorine alloy centrifugal pump with mechanical seal with the material of Graphite 169 can be used. 6) Ammonia (ammonia hydroxide): Most metals and non-metals in liquid ammonia and ammonia (ammonia hydroxide) corrosion are minor, only copper and copper alloy should not be used. Most of the company's products for ammonia and ammonia transport. Such as fluorine plastic magnetic pump, fluorine plastic centrifugal pump can be long-term and stable use. 7) Saline (sea water): Common steel corrosion rate in sodium chloride solution and seawater, salt water is not too high, the general need to use paint protection; various types of stainless steel also have a low uniform corrosion rate, but may be due to chloride ions caused by local Sexual corrosion, usually 316 stainless steel is better. Various types of chemical pump companies are applicable. 8) alcohols, ketones, esters, ethers: common alcohol medium with methanol, ethanol, ethylene glycol, propanol, ketone medium with acetone, butanone and so on, esters of various methyl ester media , Ethers, ethers medium ether, ether, butyl ether, etc., their basic corrosive is not strong, so you can use ordinary stainless steel, the specific choice should be based on the media properties and related requirements to make a reasonable choice. It is also noteworthy that ketones, esters, ethers are soluble in a wide variety of rubbers and avoid mistakes when selecting sealing materials. Second, pump selection principles: Design Institute in the design of equipment, to determine the pump usage and performance parameters and select the pump. First of all, this choice from the choice of pump type and form of the beginning, then what principle to choose the pump? What is the basis? 1, Make the type and performance of the selected pump meet the requirements of process parameters such as device flow, head, pressure, temperature, NPSH, suction and so on; 2, Must meet the requirements of medium characteristics, Or expensive medium pump requires reliable or non-leaking shaft seal pump, such as magnetic drive pump (no shaft seal, using indirect magnetic isolation drive), the transmission of corrosive media pump, convection parts require corrosion-resistant materials, Such as fluorine plastic corrosion-resistant pump, the pump containing solid particulate media, convection parts require wear-resistant materials, if necessary, the shaft seal with a cleaning liquid rinse; 3, the mechanical requirements of high reliability, low noise, small vibration; 4 , The correct calculation of pump purchase input costs. See: How to correctly calculate the cost of purchasing the pump. 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The plug valve is a fast-opening and straight-through valve. Because the movement between the rotary sealing surfaces has a wiping effect, and when it is fully opened, it can completely prevent contact with the flowing medium, so it can usually be used for medium with suspended particles. Another important feature of it is that it is easy to adapt to the multi-channel structure, so that one valve can obtain three or even four different flow channels. This can simplify the design of the piping system, reduce the amount of valves and some connecting accessories required in the equipment.
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