For the liquefied gas pump in vapor separation units, is a shielded pump better or a magnetic pump?
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For the liquefied gas pump in vapor separation units, is a shielded pump better or a magnetic pump? What are their respective advantages and disadvantages?
Magnetic pumps, shielded pumps, high-speed pumps, as well as vane pumps and the like can all be used. Magnetic pump and shielded pump are leak-free pumps; relatively speaking, shielded pumps are more stable, but the initial cost of purchasing such equipment is high. For high-speed pumps, they are a viable option if the operating conditions are stable. I saw them at the customer’s site last time, and it is said that they perform well.
In such operating conditions, shielded pumps and magnetic drive pumps perform similarly; it depends on the fluctuations in operating conditions and regular inspections. When the conditions are stable, either type of pump will work fine, but if there are significant fluctuations, it becomes uncertain which pump is suitable
Regardless of which method is used, proper procedures must be strictly followed; no device is perfect.
Ha, why are you bringing up high-speed pumps and sliding vane pumps again? It’s deviating from what the original poster expected. Magnetic pumps are used to transport liquefied gas – how should this be addressed? Which model should be used?
Without specific operating conditions and parameters, it’s impossible to select a model for any pump
This post was last edited by 3983596_FPPZ on 2019-3-9 at 15:40. In this design, the heated fluid passing through the isolation sleeve still returns to the pump inlet, causing cavitation in the pump. The solution is to direct this fluid separately back to the inlet container; modern shielded pumps and magnetic drive pumps both use this design. In fact, the challenge in designing such pumps lies in achieving axial force balance, especially in pumps with high head pressures
Although purchasing shielded pumps is a bit more expensive, they perform well in use. They are particularly useful when dealing with flammable and explosive hazardous materials such as liquefied gas, as they are less likely to leak or get damaged
I currently have two centrifugal pumps that need to be modified. Conditions for #1 pump: medium – liquefied gas; flow rate: 47 m3/h; head: 340 m; design pressure: 4.0 MPa; temperature: 40°C. 2#, Medium: Liquefied gas, Flow rate: 48 m3/h, Head: 130 m, Design pressure: 4.0 MPa, Temperature: 40℃
Without deviating from this principle, there can be many types of pumps suitable for a given operating condition.
This one. . . That one. . . The original poster mentioned shielded pumps and magnetic pumps, which indicates that they have already done their own screening. Choose one of the two. There are indeed many types of pumps that can be used for transportation, but for specific application conditions, there is actually only one optimal choice (taking into account factors such as price, leakage risk, operating conditions, maintenance requirements, and operational costs). That’s the purpose of choosing a pump, right? It’s not that anything will do; after all, as long as the purpose of transportation is achieved, just use any one of them. Even after the pump is chosen, the manufacturer still needs to make a selection.