3 replies to this topic

[ashokg9]

Hi,

 In operation of diaphragm pumps, pneumatic air supply is used at around 3.5 Kg/cm2  - 6 Kg/cm2. I am confused, how can this pump develop discharge pressure more (say 10 kg/cm2)  than the pneumatic supply pressure which is used for its working.

 

Thanks,

 

Ashok

[breizh]

Ashok ,

 

Take a look at the pump curve .

 

For reference a brochure from Yamada .

 

and a link with pump curve

 

http://www.all-flo.c...nce-curves.html

 

Hope this helps

 

Breizh

Edited by breizh, 21 November 2014 - 12:45 AM.

[shan]

The principle is the act/react force area difference.  If the air side area = 1cm2,

 

3.5 kg/cm2 * 1cm = 10 kg/cm2 * x

x = 0.35 cm2

 

Therefore, you will have 10 kg/cm2 pressure if your discharge side area is 0.35 time of air side area.

[farid.k]

I love the question. I think, it same with hydraulic principle. Just a small amount force can live up a big car.