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Pneumatic pump

Pneumatic pump

Pneumatic pump

Hello ! If I have a pneumatic pump connected to a fluid tank (fluid source), compressed air source (pressure source) and a closed tank full of liquid (output), can I increase my tank (output) pressure up to a value higher than my compressed air pressure?

Thank you in advance :)

RE: Pneumatic pump

If you mean an AODD pump then no. This assumes everything is on the same level. If the closed tank (why?) is lower then yes. But most "tanks" can only withstand a low pressure. Anything more than 15psi is usually classified as a Pressure vessel, not a tank.

If you mean another type of pump powered by an air motor then maybe - look at the pump curve or pump details.

You have somewhat economised on words / details so don't expect a lot of detail back....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Pneumatic pump

Depending on the type of pump, yes. There are intensifier pumps that generate substantially more output pressure than the air supply pressure. But, if you're using an air operated double diaphragm pump the shaft is on the motor side of the pump which reduces the surface area of the diaphragm relative to the pumping chamber side. As a result, the maximum output pressure of an AODD pump will always be less than the supplied air pressure.

RE: Pneumatic pump

Can you take a couple of pictures and share them with us ???

Sr. Process Engineer

RE: Pneumatic pump

Dear all, thank you for your reply. I am sorry for the lack of precision, but I meant to do a more general question: if a pneumatic pump can increase a pressure vessel pressure to a value grater than the compressed air pressure. I feel like at some point the fluid pressure will reach the air compressed pressure, and there is no way to keep "sending" more fluid inside the vessel...
I ask a few people and usually they try to explain the faisibility through Pascal principle... I understand that we can increase force using a system with different surfaces, but the pressure remains the same!

Thank you once again

RE: Pneumatic pump

Define "pneumatic pump" please.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Pneumatic pump


I understand that we can increase force using a system with different surfaces, but the pressure remains the same!

If you separate it into two systems you can have different pressures. The air side and fluid side are separated by a piston. If that piston has different cross-section areas for each chamber then the pressure can vary based on the ratio of areas.

Google "intensifier pump".

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