Points to consider when choosing a pump for special occasions

In order, I think it’s 1. Metal pump (titanium alloy), 2.? 3. Pumps under high pressure. 4.？ 5.？ 6. Special materials such as fluoroplastics. 7. Metal pump 8? OP, some of the questions you’re asking are problematic. Are you asking about the material or something else?

Returning to the topic on the 3rd floor: I’m asking which pumps are suitable for such operating conditions. Of course, the material of the pump depends on the type of material being handled; for example, plastic materials cannot be used in high-pressure applications, and metal materials are not suitable for highly oxidizing substances. I know something about the materials involved, but I’m not sure which type of pump is the best – whether it should be a screw pump, gear pump, magnetic pump, peristaltic pump, diaphragm pump, vortex pump, or vane pump. . . . . ? I’m not quite sure who would be a good choice?

Haha, the original poster is setting a difficult challenge here. It’s not that it’s impossible to meet all of the conditions you’ve mentioned; it’s just that if the traffic volume is high, the price resulting from such a selection will be very expensive. Moreover, there are no specific technical requirements or parameters, so it’s not possible to choose a specific option. So, I’ll share my personal opinion on how to meet some of these requirements. 1. High temperature: metals and alloy materials. 2. Ultra-low temperature: low-temperature steel. 3. High viscosity: piston-type, screw-type, diaphragm-type. 4. High pressure: piston-type, hydraulic diaphragm-type, etc. 5. No shear allowed: positive-displacement types, such as diaphragm-type, screw-type, piston-type, etc. 6. Highly toxic: diaphragm-type, magnetically driven, shielded pumps. 7. High abrasiveness: diaphragm-type. 8. Must not be exposed to air: diaphragm-type, magnetically driven, shielded pumps

1. High temperatures: Centrifugal pumps made of high-temperature resistant materials; materials such as C-6 and A-8 can be used, along with high-temperature bellows mechanical seals and appropriate auxiliary systems (such as PLAN21, 23, 32, 41, 52, 53, 54, 62, etc.). 2. Extremely low temperatures: Centrifugal pumps made of low-temperature alloy steels, equipped with low-temperature mechanical seals and appropriate auxiliary systems; care must be taken to prevent freezing. 3. High viscosity: Centrifugal pumps can be considered for viscosities up to 500 cSt; it is necessary to take into account the impact of viscosity on performance； Positive displacement pumps can also be used (especially suitable for viscosities higher than 500 cst), such as gear pumps, screw pumps, piston pumps, etc. 4. High pressure: high-pressure multi-stage centrifugal pumps, high-speed pumps, piston pumps, etc. 5. No shear allowed: positive displacement pumps can be chosen, such as piston pumps, diaphragm pumps, screw pumps. 6. Highly toxic substances: leak-free pumps are the preferred choice, such as shielded pumps, magnetic drive pumps, diaphragm pumps, etc.; ordinary centrifugal pumps equipped with appropriate mechanical seals and auxiliary systems can also achieve a leak-free condition (e.g., PLAN52, 53, 54, etc.). 7. High abrasiveness: centrifugal pumps made from wear-resistant materials can be used, such as slurry pumps, oil slurry pumps, etc. 8. Cannot come into contact with air: As in point 6, leak-free pumps are the preferred choice, such as shielded pumps, magnetic drive pumps, diaphragm pumps, etc.; ordinary centrifugal pumps equipped with appropriate mechanical seals and auxiliary systems can also achieve a leak-free condition (e.g., PLAN52, 53, 54, etc.)

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