Concentrated sulfuric acid pump selection is a common problem for chemical industry practitioners, in many production processes will be used in concentrated sulfuric acid pumps, which inevitably involves the selection of problems, such as improper selection, the lesser of which can result in increased costs, increased maintenance, affecting the production, the heavier of which may lead to the safety of personal and property, so how to correctly select the type of one of the most important issues!

　　Case medium: 98% concentrated sulfuric acid

　　Specific gravity of the medium: 1.84

　　Medium temperature: room temperature

　　Solid particles in the medium content: 1% fine particles

　　Conveying flow design: 12 cubic metres / hour

　　Conveying head design: 20 metres selection overview:

　　First, the material: originally can be resistant to concentrated sulfuric acid material has a lot, but I suggest the material or fluorine plastic (PTFE / F46), because the material is not only excellent corrosion resistance, its sealing and mechanical strength is also outstanding to ensure the safety and longevity in the process of conveying concentrated sulfuric acid, so to determine the fluorine plastic for concentrated sulfuric acid pump material.

　　Second, the pump type: conveying the specific gravity of 1.84 high specific gravity concentrated sulfuric acid, obviously the magnetic drive pump is not the most ideal choice, because the magnetic torque in the magnetic pump does not meet the requirements, it is likely to lead to "demagnetisation" or "heating" and other adverse phenomena (unless the magnetic). Unless the magnetic coupling selected for high magnetic properties of the "rare earth magnetic cylinder", but this increases the cost of the pump), so I recommend that we use centrifugal pumps.

　　Third, the motor power problem: because of concentrated sulphuric acid specific gravity of 1.84, we can follow a simple formula to calculate the actual use of the pump when the work of the shaft power is how much, the actual use of the shaft power = (clear water test) shaft power × specific gravity

　　Therefore, it can be calculated that the pump needs to be equipped with the motor power of at least "1.9 × 1.84 = 3.496", so the motor power should be selected as: 4KW!

　　Fourth, machine seal selection: the original seal can be ignored, but the case mentioned, the medium contains 1% of fine particles, so the best choice of seal wear-resistant seal - carbide seal, particle-resistant seal.