Pump industry contacts is the first wet corrosion, according to Bo Yu technology statistics, about 60% of the destruction of chemical equipment is caused due to corrosion, so in the selection of corrosion-resistant centrifugal pump first to pay attention to the selection Scientific. There is often a misunderstanding that stainless steel is a "universal material," regardless of the media and environmental conditions are held stainless steel centrifugal pump, which is very dangerous. The following for some common chemical media to talk about the selection of corrosion-resistant centrifugal pump points: Corrosion-resistant centrifugal pump selection points 1. Sulfuric acid medium as a strong corrosive medium, sulfuric acid is an important use of a wide range of 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. The experiment proved by the Chinese Academy of Sciences, There is no chemical medium to react with it, so using a fluorine-based pump (F46) is a more economical option. Boyu company applicable products include: IHF Fluorine plastic chemical pump, FSB fluoroplastic centrifugal pump, IGF Fluorine-lined pipeline pump, PF-type corrosion-resistant centrifugal pumps, CQB-F-type fluorine plastic magnetic pump. 2. Hydrochloric acid solution Most metal materials are resistant to hydrochloric acid corrosion (including a variety of stainless steel materials), molybdenum high ferrosilicon can only be used for 50 ℃, hydrochloric acid below 30%. 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. Boyu company applicable products: fluoride plastic chemical pump series can be. 3. Nitric acid Most metals are mostly corrosive in nitric acid corrosion damage, stainless steel corrosion-resistant centrifugal pump is the most widely used nitric acid centrifugal pump, all concentrations of nitric acid at room temperature have good corrosion resistance, it is worth mentioning that with The corrosion resistance of nitric acid to molybdenum stainless steel (such as 316,316L) is not only inferior to ordinary stainless steel (such as 304,321), sometimes even worse. For high temperature nitric acid, usually using fluorine plastic alloy material. Boyu company applicable products include: IHF Fluorine plastic chemical pump, FSB fluoroplastic centrifugal pump, IGF Fluorine-lined pipeline pump, PF-type corrosion-resistant centrifugal pumps, CQB-F-type fluorine plastic magnetic 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 and other harsh requirements, the choice of high-alloy stainless steel magnetic pump or fluorine plastic chemical pump such as CQB-type stainless steel magnetic pump, CQ-type magnetic drive pump, stainless steel pipe centrifugal pump, stainless steel chemical pump. 5. Alkali (sodium hydroxide) Generally corrosive is not very strong, but the general alkaline solution will have a crystal, so the choice of configuration silicide, graphite 169 mechanical Seal FSB-type fluoroplastic alloy centrifugal pump. 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 the IHF fluorine plastic chemical pump, FSB fluoroplastic centrifugal pump, IGF-lined fluorine pipeline pump, PF-type corrosion-resistant, CQB-F-type fluorine plastic magnetic pump, CQF-type plastic magnetic magnetic pump better. Above is the selection of corrosion-resistant centrifugal pump points, as long as you remember that 6:00, I believe you can very good selection of corrosion-resistant centrifugal pumps. 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Silicone o-rings are based on silicon, an element derived from quartz. To create this class of synthetic elastomers, pendant organic groups such as methyl, phenyl and vinyl are attached to silicon atoms. Different additions of side chains can achieve significant variations in properties. Silicone o-rings have excellent heat, ozone and corona resistance and have good dielectric stability and resistance to many oils, chemicals and solvents. Silicone o-rings possess the best flexible property at low temperature but have low tensile strength and poor wear and tear resistance.

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Standard silicone o-ring compounds are usually peroxide-cured. Platinum-cured compounds offer better flexible properties and very low volatile matter. Platinum-cured silicone o-rings usually are applied in medical systems or other required low volatile matter. However, they need to be produced in a clean room and with a higher cost of platinum catalyzer, making them more expensive than peroxide-cured ones.

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