How should selection of acid-resistant pump it? Here is a trick, first of all depends on what you are conveying acid, here to introduce you to some common acid-resistant pump selection methods:

1, hydrochloric acid pump

    The maximum concentration of hydrochloric acid used was 38%, so basically as long as the hydrochloric acid pump over-current components made of plastic on the list, but if from life, cost, etc. to consider, then you can use FSB fluorine alloy pump or CQB -F magnetic pump, the price of these two kinds of pumps, performance satisfactory.

2, sulfuric acid pump

    Sulfuric acid into dilute sulfuric acid pump pump pump with concentrated sulfuric acid, the former optional larger in scope, dilute sulfuric acid pump can choose plastic pump, ceramic pumps, or F46 pump, F26 pump, the latter (concentrated sulfuric acid pump) can only be Select fluorine plastics (F46) pump, as will be concentrated sulfuric acid corrosion of common engineering plastics, while the fluorine plastics will not be corroded. Also note that the higher the density of sulfuric acid, the election when the pump motor power should pay attention with big, simple algorithm for the "shaft power" * 1.84 shall be concentrated sulfuric acid when the transmission shaft power.

3, hydrofluoric acid

    Corrosive hydrofluoric acid is very strong, suggested the use of fluorine plastic magnetic pump, (and the series of pumps must be replaced with ceramic pieces of hydrofluoric acid-resistant material)

4, nitric acid

    Has also suggested the use of nitric acid pump fluorine plastic magnetic pump, and the rubber seals should be replaced with PTFE material.

5, acetic acid

    It is the organic acid, one of the most corrosive substances, ordinary iron and steel in all of the acetic acid concentration and temperature will be severe corrosion, stainless steel is an excellent acid-resistant materials, 316 stainless steel containing molybdenum is also applicable to high temperature and dilute acetic acid vapor . For the high temperature and high concentrated acetic acid, or contain other corrosive media such as stringent requirements may make use of high alloy stainless steel or fluorine plastic magnetic pump. If CQB Magnetic Pump, CQ316L stainless steel magnetic pump

6, salt water (seawater)

    Ordinary steel in sodium chloride solution and sea water, salt water corrosion rate is not too high to be used in general coating protection; all kinds of stainless steel also has a very low uniform corrosion rate, but may be due to localized corrosion caused by chloride ions, usually in 316 stainless steel is better, but its price is higher, suggested the use of fluorine plastic centrifugal pumps, such as the IHF chemical centrifugal pump.

7, sealing

    Seal Type: magnetic pump for static seal the form, it can not consider the seal, and centrifugal pumps generally use the outside-mounted bellows mechanical seal, its decay wear resistance are better, such as the transmission medium containing particles may be using hard on the hard mechanical seal.