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Thank you All, I tried to look for Reda pump and found this page,http://www.slb.com/services/production/artificial_lift/horizontal_pumping_systems.aspx, which shows good video information about oil pumping type pump, it is quiet different than what I thought, every interesting, thank you for...

if so, Why there are Electric Submersible well Pumps can be used in the Oil and Gas Industry?

Hello Can anyone tell me that if it is ok for 4 inch Electric deep well pump with oil motor single phase 220/50hz pumping oil in oil industry? Any information and suggestion will be appreciated Thank you.

Thanks guys, I got answers in other forum, i dont know how to close this thread, but I got answers already thanks.

Thanks Mike.

Factory tells my customer that they dont need a controller to run the BLDC Pump only if they need to control the speed of the pump, so for coasting down my customer thinks they will change normal ac pump+inverter to just BLDC pump which factory tells them ok that pump can run in full speed...

Thank you Blacksea, that is useful information

Can anyone tell me about brushless DC pump motor if it is possible to use Brushless DC pump and get DC power directly from battery（use transformer to get AC to DC into Battery for charging as power source) maybe I dont need use inverter anymore, is that possible? I heard that Brushless DC pump...

My customer is talking about brushless DC pump, they think if they can use Brushless DC pump and get DC power directly from battery（use transformer to get AC to DC into Battery for charging as power source) maybe they dont need use inverter anymore, is that possible? I heard that Brushless DC...

Thank you guys [cheers]

So I understood now is DC pump expensive and short life, anyway the AC pump is more economized, do I understand right? This link from Grundfos that Ozmosis provided is saying that pump is compatible with both DC and AC power supply without requiring an external inverter, How can a pump can...

Thanks Mike, I understood that DC Pump Price will be shocking Lifecycle cost, AC is cheaper than DC? but they are asking about brushless DC pump, is it also very costy in price and lifecycle cost? and I heard DC pump must work with a controller is that true? i heard a controller is even more...

Can any nice people tell me why the existing of Power Inverter With Built-In Battery Charger is necessary if I can have DC Pump? because my customer asks me to search for DC pump they want to get rid of inverter, i am not sure if it can work out since the power supplier is generally in AC...