Bellow vs Diaphragm

Bellow

Diaphragm

CFM

3 - 6

1.1 - 1.2

Stroke

1 - 3/4 ‘’

1/2’’

Quality

GoodYear / Firestone

Generic

Life Expectancy  

15 to 25 Years

2 to 3 years

Availablity

Any Auto Parts Store

Unknown

Warranty

5 Years

Zero

Compressor Type

Per Day

Per Month

Per Year

Bellow @ 3 CFM

4, 320

129, 600

1, 555, 200

Diaphragm @ 1.1 CFM

1, 440

43, 200

518, 400

Using Average of 15 to 28 MPH Wind Speed

Bellow @ 6 CFM

8, 640

259, 200

3, 110, 400

Diaphragm @ 1.2

1, 728

51, 840

622, 080

vs
Keep in mind Volume of Air put in a pond is more important than Pressure.
It’s simple physics & math. The more Stroke the more Air.
As you can see from the pie charts below the Bellow pumps MUCH more 
CFM (Cubic Foot of air per Minute) into your pond than a Diaphragm.
15 - 28 MPH
3 - 5 MPH
Bellow vs Diaphragm
Click Here & See for Yourself  !
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