Talking about the correct selection method of fluorine-lined pump and acid-resistant pump
Fluorine-lined pump is a new type of corrosion-resistant chemical process pump widely used at present. The main models include fluorine-lined magnetic pump, fluorine-lined self-priming pump and fluorine-lined centrifugal pump.
What should be considered in the selection of fluorine lined pump
Fluorine-lined pump is a new type of corrosion-resistant chemical process pump widely used at present. The main models include fluorine-lined magnetic pump , fluorine-lined self-priming pump and fluorine-lined centrifugal pump . Due to their different characteristics, they can be used in many industries and fields. For example, fluorine-lined magnetic pumps have absolutely no leakage characteristics, which can solve the safety problems caused by leakage when transporting flammable, explosive, and toxic media. Completely eliminate hidden safety hazards and bring safety protection to the personnel and property of the company. Fluorine-lined self-priming pumps are used to replace traditional submersible pumps . Compared with traditional submersible pumps , this type of pump has a greatly improved self-priming height At the same time, efficiency has also been increased by 50-150%, and energy consumption has also been reduced, improving production efficiency for enterprises.
How should I choose a lining pump? This first depends on what medium you are transporting and the temperature of the medium. The following green ring pump industry will introduce you to several common corrosion resistant pump selection methods:
1. Pump for hydrochloric acid
The highest concentration of commonly used hydrochloric acid is 38%. Therefore, the pump for hydrochloric acid is basically as long as the material of the flow part is plastic, but if you consider the service life and cost performance, you can choose FSB fluorine alloy centrifugal pump or CQB -F magnetic pump , the price and performance of these two pumps are satisfactory.
2.Sulfuric acid pump
Sulfuric acid pumps are divided into dilute sulfuric acid pumps and concentrated sulfuric acid pumps. The former has a wide range of options. Dilute sulfuric acid pumps can be selected from engineering plastic pumps, ceramic pumps, or F46 and F26 pumps. Can choose fluoroplastic (F46) pump, because concentrated sulfuric acid will corrode ordinary engineering plastics, but fluoroplastics will not be corroded. It should also be noted that the density of concentrated sulfuric acid is high. When selecting the pump, the power of the motor must be large. The simple algorithm is "shaft power" * 1.84, which is the shaft power when transporting concentrated sulfuric acid.
3. Hydrofluoric acid
Hydrofluoric acid is very corrosive, it is recommended to choose a fluorine-lined magnetic pump (and the ceramic parts of this series of pumps must be replaced with a material resistant to hydrofluoric acid)
It is also recommended to use a fluoroplastic magnetic pump for the nitric acid delivery pump, and the rubber sealing ring should be replaced with a PTFE material.
It is one of the most corrosive substances in organic acids. Ordinary steel will be severely corroded in acetic acid at all concentrations and temperatures. Stainless steel is an excellent acetic acid resistant material. Molybdenum-containing 316 stainless steel is also suitable for high temperature and dilute acetic acid steam. . For severe requirements such as high temperature and high concentration acetic acid or other corrosive media, hmsfa.com can choose high alloy stainless steel or fluoroplastic magnetic pump. Such as CQB magnetic pump, CQ316L stainless steel magnetic pump
6. Salt water (sea water)
The corrosion rate of ordinary steel in sodium chloride solution, seawater and salty water is not too high, and it is generally necessary to use paint protection; various types of stainless steel also have a very low uniform corrosion rate, but may cause local corrosion due to chloride ions, usually 316 stainless steel Better, but its price is higher, it is recommended to use fluoroplastic centrifugal pumps , such as LHF chemical centrifugal pumps.
Sealing type: The magnetic pump is a static sealing type, so it is not necessary to consider the tightness. The centrifugal pump generally uses an external-type bellows mechanical seal, which has good corrosion resistance and abrasion resistance. For hard mechanical seals. Magnetic pump, (and the ceramic parts of this series of pumps must be replaced with hydrofluoric acid resistant materials) hmsfa.com