# Thread: air cylinder pressure

1. ## air cylinder pressure

Does anyone know how to calculate the pressure that a air cylinder can generate. I want to use a cylinder to generate pressure by forcing the shaft down to force air out the port, will this vary with temperature.

2. Area X Pressure = overall force. I believe. google it.

3. ## pressure the unit is capable of producing

I am using a air cylinder to make pressure ie. compressing the rod down forces air out the 1/4 port what will that pressure be if it is 20mm tube with 400mm stroke.

4. Area of circle = 20mm (dia.)= r (radius) 10mm
pi = (3.1416) X r squared (100) = area (314.2 sq.mm)
Force being applied is missing from the equation. How much force will you apply to the rod? This will be the PRESSURE at the outlet.

Dick Z

5. In this senario you will need to divide the input pressure by the surface of the piston in the cylinder.

Example your surface is 314.2 if you use 100psmm your pressure @ the 1/4" outlet will be a whopping 0.31826862psmm

6. Radius squared x pi x air pressure. IE a 2 1/2in cylinder on 90psi air pressure would 1.25 x 1.25 x 3.14 x 90 = 441.56 lbs of force.

Use the same formula to subtract the piston rod dia. for the retraction force.

7. vidio1 you would be correct if they were useing the cylinder that way.. lol.. they say they want to make pressure with the cylinder... so your math is way off for this application.. Although if you put 441.56 pounds of pressure on the rod then the cylinder would infact produce 90 psi...

No not reverse inside the cylinder... but on the rod, as if it were an air compressor...

8. I see......That's what I get for skimming over a post an assuming I know the answer.

9. lol... That's nothing I have ever done! Yea, sure!! I still do that...

10. How much force are you looking to develop?

11. ## Outlet pressure

So volume of air in the stroke of the piston plays no part in the equation but would play a role in the volume of air available at that pressure is this correct.

12. Yes.
Whatcha trying todo?

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