Acid pump should be how to choose? Here is a trick, first of all depends on what you are conveying acid, here are a few common acid pump selection method:
1, hydrochloric acid pump
The highest concentration of commonly used hydrochloric acid is 38%, so, basically as long as the hydrochloric acid pump flow components made of plastic on the line, but if from life, cost and other aspects to consider it, you can use FSB or CQB-F fluorine alloy pump magnetic pump, the price and performance of the two pump is satisfactory.
2, sulfuric acid pump
Sulfuric acid pump into sulfuric acid pump pump with concentrated sulfuric acid, the former optional large range of sulfuric acid pump can choose plastic pump, ceramic pump, pump, pump F26 or F46, the latter (sulfuric acid pump) can only select fluorine plastic (F46) pump, because of concentrated sulfuric acid will corrode common engineering plastics however, the fluorine plastic will not corrode. It should also be noted that the density of concentrated sulfuric acid is higher, when the pump power to choose to pay attention to the big, simple algorithm for the "shaft power" *1.84 is the delivery of concentrated sulfuric acid when the shaft power.
3, hydrofluoric acid
Corrosive hydrofluoric acid is very strong, and suggested the use of fluorine plastic magnetic pump (and the series of pumps must be replaced with ceramic parts hydrofluoric acid resistant materials)
4, nitric acid
Nitrate pump also suggested the use of fluorine plastic magnetic pumps, and rubber seals should be replaced with PTFE material.
5, acetic acid
It is one of the most corrosive substances in organic acids, ordinary steel will be severe corrosion in all the acetic acid concentration and temperature, acid resistant stainless steel is an excellent material, but also 316 stainless steel containing molybdenum for high temperature and dilute acetic acid vapor. For high temperature and high concentration of acetic acid or contain other corrosive media and other harsh requirements, can choose high alloy stainless steel or fluorine plastic magnetic pump. Such as CQB magnetic pump, CQ316L stainless steel magnetic pump
6, salt water (sea water)
Ordinary steel in Sodium Chloride Solution and sea water, salt water corrosion rate is not high, are generally required to use paint protection; all kinds of stainless steel has a very low corrosion rate, but may be due to localized corrosion caused by chloride ions, typically 316 stainless steel is better, but its price is higher, suggested the use of fluorine plastic centrifugal pump, such as IHF chemical centrifugal pump.
Sealing form: magnetic pump for the static seal form, it can not consider the seal, centrifugal pumps generally use the externally mounted bellows mechanical seal, the corrosion wear resistance are better, such as the transport medium containing particles can be used hard on hard mechanical seal.