【Daily Question: Pump Equipment】Short Answer Question, 2019.2.28
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This post was last edited by 3983596_FPPZ on 2019-2-28 at 10:22. Rules for the bg2.png quiz: 1. For incorrect answers, +2 wealth is given for active participation; for answers that are somewhat reasonable but not specific enough, +5 wealth is given; for correct answers, +8 wealth is given. 2. Rewards for answers are available once per person only. 3. Each reply allows scoring for only one person. 4. The answer and its explanation will be visible after responding. 5. The reward is valid for 48 hours; no reward will be given if the deadline is exceeded. Studying* and winning awards again; come by often. Briefly describe: What distinctive properties must a material possess in order to be used as an isolation sleeve for magnetic pumps and a shielding sleeve for shielded pumps? (Answer 1-2 items + 5 wealth ； Answer 3 or more items +8 points. Answers: 1. High compressive strength (high tensile strength); 2. Corrosion resistance (resistant to corrosion by most chemical agents); 3. Low magnetic permeability (non-ferromagnetic material, offering low resistance to passing magnetic fields); 4. High electrical resistivity (reducing the magnitude of magnetic induction eddy currents); 5. Easy to shape (suitable for machining, welding, etc.); 6. Acceptable cost
High pressure resistance, corrosion resistance, high resistivity
Corrosion-resistant, high strength, high electrical resistance of the material, and good weldability
Generally, materials that are non-ferrimagnetic, have a high resistivity, and possess high strength should be chosen
The isolation sleeve of a magnetic pump should have excellent magnetic permeability as well as wear and corrosion resistance. The shielding sleeve of a shielded pump should prioritize corrosion resistance
Durable, corrosion-resistant, with good sealing properties
Easy to shape, corrosion-resistant, wear-resistant, high strength
1. Corrosion resistance； 2. Low magnetic permeability ； 3. Easy to process and shape ； 4. High voltage resistance ； 5. High resistivity ； 6. The price is acceptable
1. UHMW-PE (Ultra-high molecular weight polyethylene) 2. PFA plastic (Soluble polytetrafluoroethylene)
Try to choose materials that are non-ferromagnetic and have a high resistivity; or metallic materials with high resistivity and high strength, while minimizing the thickness as much as possible