Issues related to the selection of mechanical pumps
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Experts, please help me analyze this. There is a wax oil pump at the bottom of an atmospheric pressure tower, and its parameters are as shown in the diagram above: it has a very low flow rate but a high head. Previously, an OH6 model was used, with a rotation speed of up to 9000 revolutions per minute; however, it caused quite a lot of vibration. Now we are considering using a BB5 model – is this a reasonable choice? It seems that the cost of this model is high, which might be considered a waste. Please help me analyze this situation
Your flow rate is 32.2 m3/h, which is relatively low. The OH6 vibration type offers less vibration compared to the BB5 type, and it is also cheaper; therefore, the BB5 type is not recommended.
Based on the parameters you provided, the wax oil pump at the bottom of the atmospheric pressure tower needs to have a high head and a low flow rate. OH6 is a reliable high-speed centrifugal pump, suitable for applications requiring high flow rates and high head pressures ； BB5 is a multi-stage centrifugal pump suitable for applications requiring high head and low flow rates. Therefore, replacing OH6 with BB5 is a reasonable choice. Although BB5 has a higher cost, it offers better stability and reliability, which can reduce the failure rate and maintenance costs, resulting in better economic benefits in the long run. Therefore, it is recommended to select the appropriate pump type based on actual needs, taking into account not only the purchase cost but also factors such as operating costs, maintenance costs, and lifespan. .
This post was last edited by In silence on 2023-6-27 at 16:51. 208m 30m3/h – it’s hard to decide. Besides, you also have a minimum flow rate of 16. The cost of purchasing a valve separately is roughly the same as the cost of your OH6 unit, and its efficiency is lower as well. It’s not worth it. Learn about the rotary jet pump? It can replace OH6, but its maturity is not as high as that of OH6.
I sent a BB5 specification sheet, but it got deleted