I like the method but I think you may have made a mistake with the final part of your calculation. Your volume of 7.2 cfm seems reasonable, but wouldn't this be at the average tank pressure during filling and not the max tank pressure because you timed the entire fill cycle? The tank was not at 160 psig the entire time, only at the end. The average tank pressure would be 80 psi if you started at 0 and ended at 160 psi. 7.2 cfm at 80 psi seems like a more reasonable value when you consider similar pumps especially if yours is only running on a single cylinder.
No the calculation is done at what the compressor kicks off at, whatever pressure its set at because the pump will start to load the head at higher pressures and slow down its output.. so you calculate all of its work from no air to full tank.. technically it should equal the same cfm if using a 1000 ga tank because the atmospheric pressure is the same on 1000 ga of air as it is on 1 ga.. so the pump would run for a lot longer time but once the big tank started getting to full pressure of 160psi, the amount of force it would take the pump to push in more air would be the same as it would @160psi on a 1 ga tank.. cfm is just measuring how fast it takes the pump to get there.. if measured at 80psi it should equal the same cfm as measured at 160 .. if using same tank and pump and plumbing..
@@Z-Ack What I can't get past is the flow of the compressor pump is not constant over pressure. Flow ratings at 45 psig are always greater than at 90 psig or at max pressure psig. With that in mind, measuring the time to fill the tank from 0 psig to max psig can only give you the average flow, not the flow at any one pressure. If you only have a measure of the average flow you can't say it is valid at peak pressure. This is why I suggested averaging the pressure between 0 psig and max pressure.
Compressor pumps are rated at different RPMs larger pumps generally turn at 700 to 900 RPM smaller pumps turn faster so you have to be aware of the pumps recommended rpm for proper lubrication. Did your one cylinder fail due to improper pump rpm?
Haddi G hey when the pressure in the tank hits a certain pressure it will trigger the switch which turns the power off to the motor. Hope that helps :)
Mohammad Imran hey Mohammad, to calculate the volume of you will need to calculate your cylindrical tank volume and then add the cap volume to get your total. Easiest way is just to use a calculator (try this link) www.calculator.net/volume-calculator.html
aditya choudhary 14 pounds per square inch is the is the atmospheric pressure where the video was shot. 14 PSI is fairly average however this WILL change depending on where you live. If you google the atmospheric pressure for the area you live you should be able to find it.
Great informative video!!!
I really don't get it. I thought CFM was the flow rate of air leaving the tank towards the tool, not the flow rate of air filling the tank...
No, bc you can have varying amounts of air leaving the compressor with different hoses, fittings and tools. The pump is a constant.
I like the method but I think you may have made a mistake with the final part of your calculation. Your volume of 7.2 cfm seems reasonable, but wouldn't this be at the average tank pressure during filling and not the max tank pressure because you timed the entire fill cycle? The tank was not at 160 psig the entire time, only at the end. The average tank pressure would be 80 psi if you started at 0 and ended at 160 psi.
7.2 cfm at 80 psi seems like a more reasonable value when you consider similar pumps especially if yours is only running on a single cylinder.
Good point, I never thought of that 👍
No the calculation is done at what the compressor kicks off at, whatever pressure its set at because the pump will start to load the head at higher pressures and slow down its output.. so you calculate all of its work from no air to full tank.. technically it should equal the same cfm if using a 1000 ga tank because the atmospheric pressure is the same on 1000 ga of air as it is on 1 ga.. so the pump would run for a lot longer time but once the big tank started getting to full pressure of 160psi, the amount of force it would take the pump to push in more air would be the same as it would @160psi on a 1 ga tank.. cfm is just measuring how fast it takes the pump to get there.. if measured at 80psi it should equal the same cfm as measured at 160 .. if using same tank and pump and plumbing..
@@Z-Ack What I can't get past is the flow of the compressor pump is not constant over pressure. Flow ratings at 45 psig are always greater than at 90 psig or at max pressure psig. With that in mind, measuring the time to fill the tank from 0 psig to max psig can only give you the average flow, not the flow at any one pressure. If you only have a measure of the average flow you can't say it is valid at peak pressure. This is why I suggested averaging the pressure between 0 psig and max pressure.
How to calculate how much cfm this compressor will have at 29psi?
Compressor pumps are rated at different RPMs larger pumps generally turn at 700 to 900 RPM smaller pumps turn faster so you have to be aware of the pumps recommended rpm for proper lubrication. Did your one cylinder fail due to improper pump rpm?
Good point. No the bottom came loose and created a knock.
160 psi mean compressor switch off when pressure build up in tank?
Haddi G hey when the pressure in the tank hits a certain pressure it will trigger the switch which turns the power off to the motor. Hope that helps :)
Sir what is .132&5
Hey Mohammed, .132 is just how to calculate gallons of air into cubic feet so that you can complete your calculation.
can you help calculate the gallons size of my tank it 50" round and 24" long thank you
How old is that tank
target pressure 160 psi
Haddi G correct
I have new air tank i dont know how much air i can fill in it. How i can calculate the air capacity in this tank
Mohammad Imran hey Mohammad, to calculate the volume of you will need to calculate your cylindrical tank volume and then add the cap volume to get your total. Easiest way is just to use a calculator (try this link) www.calculator.net/volume-calculator.html
Sir time taken we take is 0 to 160 psi?
Sorry I don’t understand
sir what is 14
aditya choudhary 14 pounds per square inch is the is the atmospheric pressure where the video was shot. 14 PSI is fairly average however this WILL change depending on where you live. If you google the atmospheric pressure for the area you live you should be able to find it.
not even close