Centrifugal Chemical Transfer Pump

Centrifugal Chemical Transfer Pump products are classified according to the principle and layout

Corrosion has always been one of the most headache hazards of chemical equipment. A little carelessness can damage the equipment, or cause an accident or even a disaster. According to relevant statistics, about 60% of the damage of chemical equipment is caused by corrosion. Therefore, the scientific nature of the material selection should be paid attention to in the selection of chemical industry. There is usually a misunderstanding that stainless steel is a "universal material". It is very dangerous to use stainless steel regardless of the medium and environmental conditions.

The following are the key points for selecting chemical media:

1. Sulfuric acid is one of the strong corrosive media. Sulfuric acid is an important industrial raw material with a wide range of uses. The corrosion of sulfuric acid with different concentrations and temperatures is quite different. For concentrated sulfuric acid with a concentration of more than 80% and a temperature of less than 80℃, carbon steel and cast iron have good corrosion resistance, but it is not suitable for high-speed flowing sulfuric acid. 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. 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 it is a more economical choice to use a fluorine-lined pump (F46).

2. Alkali (sodium hydroxide) steel is widely used in sodium hydroxide solution below 80℃ and 30% concentration. There are also many factories that still use ordinary steel when the temperature is below 100℃ and 75%. Although the corrosion increases, it is economical. . The corrosion resistance of ordinary stainless steel to lye has no obvious advantages compared with cast iron. As long as a small amount of iron is allowed to be mixed in the medium, stainless steel is not recommended. For high-temperature lye, titanium and titanium alloy or high-alloy stainless steel are mostly used.

3. Ammonia (Ammonia Hydroxide) Most metals and non-metals have slight corrosion in liquid ammonia and ammonia (Ammonia Hydroxide). Only copper and copper alloys are not suitable for use.

4. Salt water (sea water) The corrosion rate of ordinary steel in sodium chloride solution, sea water and salt water is not very high, and generally must be protected by paint; all kinds of stainless steel also have a very low uniform corrosion rate, but it may be localized due to chloride ions Corrosion, usually 316 stainless steel is better.

These are some keys for selecting Centrifugal Chemical Transfer Pump.

If you want to know more about Centrifugal Chemical Transfer Pump,

Shirley S.

Phone/WA: +86 13932278621

Email: admin@deponpump.com

Website: www.deponpump.com