There is usually a misunderstanding that stainless steel is a 'universal material', regardless of the medium and environmental conditions, it is not correct and dangerous.But you can try the emerging ceramic ball valve. However, if the temperature of such a medium exceeds 150°C, or the pressure is greater than 16 kg, any plastics (including polypropylene, fluoroplastics and even polytetrafluoroethylene) will not be competent, and there is no ideal valve on the market.

Contrary to metal materials, most non-metal materials have good corrosion resistance to hydrochloric acid, so rubber pumps and plastic pumps (such as polypropylene, fluoroplastics, etc. Hydrochloric acid medium: Most metal materials are not resistant to hydrochloric acid corrosion (including various stainless steel materials), and high-silicon ferro-molybdenum can only be used in hydrochloric acid below 50°C and 30%. If the pressure is too high and the temperature rises, the point of use of the plastic valve will be impacted, and you can only choose the more expensive ceramic ball valve.

It is not suitable for use as a material for pump valves; ordinary stainless steels such as 304 (0Cr18Ni9) and 316 (0Cr18Ni12Mo2Ti) have limited use for sulfuric acid media. For concentrated sulfuric acid with a concentration above 80% and temperature less than 80℃, carbon steel and cast iron have good corrosion resistance, but it is not suitable for high-speed flowing sulfuric acid. According to relevant statistics, about 60% of the damage of chemical equipment is caused by corrosion.

Here are some key PTFE BBQ grill mats points of material selection for some commonly used chemical media: The advantages of this valve are self-lubricating, low torque, no aging, and a much longer life than ordinary valves. Its disadvantage is that the price is much higher than that of plastic valves. Therefore, pump valves for transporting sulfuric acid are usually made of high-silicon cast iron (difficult to cast and process) and high-alloy stainless steel (alloy 20).

Fluoroplastics have good resistance to sulfuric acid, and fluorine-lined pump valves (F46) are a more economical choice. Sulfuric acid media, as one of the strong corrosive media, sulfuric acid is an important industrial raw material with a very wide range of uses. The corrosion of sulfuric acid with different concentrations and temperatures is quite different.

If the metal materials of chemical valves cannot be selected correctly, a little carelessness can damage the equipment, or cause accidents or even disasters.For valves under corrosive medium conditions, anti-corrosion is the most critical part of chemical equipment. Therefore, the scientific nature of the material selection should be paid attention to when selecting the chemical equipment.) are the best choice for transporting hydrochloric acid