Ted,
The early bird gets the worm, or in this case answered the question. 05:19...I hope you had your cup of coffee in your hand.
Ted is the numbers man. He nailed it on the the head that you will not have any volume of air available at the bottom pushing that much pressure.
Its like putting your finger over the end of a hose to get the water to shoot out farther. Of course if you do that you reduce the amount of water but the pressure is greater to shoot it out further.
"Linear Piston" the pump is magnet driven. It moves two pistons that operate diaphrams inside the pump. So, yes technically it is a piston but actually uses diaphrams to pressurize the air. Stick with a rotary vane or wobl piston.
