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Acid pump selection program
The following is a detailed guide on the selection of acid pumps, covering various types of acids and recommended pump materials for optimal performance and longevity.
1. **Hydrochloric Acid Pump**: Hydrochloric acid with a maximum concentration of 38% is commonly used. For such applications, plastic components are typically sufficient for the wetted parts. However, considering long-term service life, cost efficiency, and reliability, it's advisable to choose FSB fluorine alloy centrifugal pumps or CQB magnetic pumps. These options offer excellent performance at a reasonable price.
2. **Sulfuric Acid Pump**: Sulfuric acid pumps are generally divided into dilute and concentrated types. For dilute sulfuric acid, engineering plastic pumps, ceramic pumps, or F46/F26 pumps can be suitable. However, for concentrated sulfuric acid, only fluoroplastic (F46) pumps are recommended, as common engineering plastics are easily corroded by concentrated sulfuric acid. Additionally, due to the high density of concentrated sulfuric acid, the pump power must be carefully calculated—approximately 1.84 times the shaft power is required to ensure efficient operation.
3. **Hydrofluoric Acid Pump**: Hydrofluoric acid is highly corrosive and requires special handling. It is strongly recommended to use a fluoroplastic magnetic pump. Moreover, any ceramic parts in contact with hydrofluoric acid should be replaced with alternative materials to prevent damage.
4. **Nitric Acid Pump**: Nitric acid is also highly corrosive, so a fluoroplastic magnetic pump is suggested. In addition, rubber seals should be replaced with PTFE material to improve corrosion resistance and sealing performance.
5. **Acetic Acid Pump**: Acetic acid is one of the most aggressive organic acids. Ordinary steel will corrode severely regardless of concentration or temperature. Stainless steel, particularly 316 stainless steel containing molybdenum, is an excellent choice for resisting acetic acid. For high-temperature or high-concentration acetic acid environments, high-alloy stainless steels or CQB series fluoroplastic magnetic pumps are recommended. The CQ316L stainless steel magnetic pump is also a reliable option for harsh conditions.
6. **Salt Water (Seawater) Pump**: In seawater or sodium chloride solutions, ordinary steel has a relatively low corrosion rate, but protection like paint coatings is often needed. Various stainless steels show good corrosion resistance, but they may suffer from localized corrosion caused by chloride ions. 316 stainless steel is a better choice, though more expensive. Alternatively, fluoroplastic centrifugal pumps, such as IHF chemical pumps, are often recommended for their durability and resistance in such environments.
7. **Sealing Type**: Magnetic pumps use a static seal, eliminating the need for traditional mechanical seals. Centrifugal pumps, on the other hand, typically use external bellows mechanical seals, which offer superior corrosion and wear resistance. If the medium contains particles, hard-to-hard mechanical seals are recommended for better performance.
At Yixing Zeus Pump Co., Ltd., we specialize in providing high-quality, corrosion-resistant pumps tailored to your specific needs. We sincerely invite you to collaborate with us and benefit from our expertise and reliable products. Let us help you find the best solution for your application.