Selection of ball valves for sulfuric acid and hydrochloric acid
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Our facility has one tank for industrial sulfuric acid and one for industrial hydrochloric acid, and leaks occur every year due to valve corrosion. How should we choose ball valves? Note: We usually purchase acid-resistant valves from the market.
You need to provide some specific parameters, such as the acid concentration and temperature, so that I can give you appropriate recommendations. In general, valves used for hydrochloric acid must have a lining; rubber or plastic linings work well, while materials like stainless steel cannot withstand high concentrations of hydrochloric acid； For high-concentration sulfuric acid at moderate temperatures, carbon steel and cast iron can be used, but they are not suitable for long-term use; the most economical choice is fluoroplastics.
It’s best to specify the detailed parameters. I think that when the pressure and temperature are not high, plastic valves are a suitable choice; they are not expensive, and imported brands are of better quality
Industrial sulfuric acid has a concentration of 92–98%, while hydrochloric acid has a concentration of around 31%. The storage tank generally holds 10 tons of sulfuric acid and 5 tons of hydrochloric acid. This post was last edited by I’m quick on 2009-2-17 10:28]
Check page 882 of the \"Corrosion Data and Material Selection Handbook\": for industrial sulfuric acid with a concentration of 92–98%, plastic valves are not suitable.:) For hydrochloric acid with a concentration of around 31%, plastic valves can be used. It seems you need to choose a better material: fluoroplastic ball valve
In terms of durability, steel-lined PTFE ball valves perform well.
Either fully fluorinated ball valves or CPVC ball valves can be used
Chenli valves are relatively inexpensive, but if they come loose or get damaged, the underlying material will corrode rapidly. If budget permits, it is recommended to use high-alloy materials such as Hastelloy, ALL02, and 20
Non-metallic valves are generally used, such as PP, PVC, PDFT, etc.
This situation. Lined butterfly valves and ball valves work fine either!
Use plastic valves when the pressure is not high; use Q41F46-16C ball valves when the pressure is high! Beijing Alken Valve Co., Ltd., Zhang Zilong, 13554412277
Please use a PFA-lined valve, plug valve, or ball valve; they are very effective and have a long service life.
For concentrations of hydrochloric acid or sulfuric acid ranging from 92-96%, at temperatures of 40-50 degrees, and within a diameter of 6 inches, industrial diaphragm valves are recommended; manufacturers such as Saunders, ITT, and Swissfluid produce such valves. In other cases, XOMOX’s plug valves (SS) or ASAHI’s disc valves can also be used...
For the projects of our company, PVC ball valves and pipes are used to transport hydrochloric acid, and even the metering tanks are made of PVC