What pump is used for concentrated sulfuric acid?

Non-metallic pumps, specifically fluorine-lined pumps, are generally used. There’s a lot of information on this topic in the forum; you might want to give it a search.

Please use the discussion search function before asking for help; your question is too general – the concentration and temperature of sulfuric acid both have an impact on the material to be used. Reference available: http://bbs.hcbbs.com/viewthread.php?tid=246883

High-silicon cast iron or the alloy materials produced by Dalian Acid-Resistant Pump Factory are used by several domestic manufacturers of concentrated sulfuric acid pumps – companies such as Jiahe Pump Industry and Chengdu Pump Industry

Sulfuric acid, as one of the highly corrosive substances, is an important industrial material with a wide range of applications. Sulfuric acid at different concentrations and temperatures causes varying degrees of corrosion to materials. For concentrated sulfuric acid with a concentration of over 80% and a temperature below 80°C, carbon steel and cast iron exhibit good corrosion resistance; however, it is not suitable for sulfuric acid that flows at high speeds, and it cannot be used as material for pumps and valves ； Common stainless steels such as 304 (0Cr18Ni9) and 316 (0Cr18Ni12Mo2Ti) also have limited utility in sulfuric acid media. Therefore, pump valves for transporting sulfuric acid are usually made of high-silicon cast iron (which is difficult to cast and process) or highly alloyed stainless steel (grade 20 alloy). Fluoroplastics exhibit good resistance to sulfuric acid, making the use of fluorine-lined pumps (F46) a more economical option. The company’s applicable products include IHF fluoroplastic chemical pumps, PF(FS) highly corrosion-resistant centrifugal pumps, CQB-F fluoroplastic magnetic pumps, and more.

For concentrated sulfuric acid, submersible pumps are generally used, as it is safer that way

For pumping concentrated sulfuric acid, fluoroplastic-lined pumps are the preferred choice; they can withstand the corrosion caused by sulfuric acid of various concentrations, and they are also relatively inexpensive!

It is still necessary to specify the concentration and temperature of sulfuric acid to facilitate selection. At room temperature, a 95% concentration can be used with carbon steel

The standard approach is to use a dedicated sulfuric acid pump; sometimes a PTFE pump can also be used

For normal temperature, 98 acid, and 105 acid pumps, stainless steel will suffice.

Our company uses fluoroplastic pumps, and they work quite well.