(ludhiana, punjab, india)
i have a atlas copco screw air compressor with rated capacity 500 cfm at 7.5 bar and 400 cfm at 10 bar.
i currently running compressor at 10 bar, can i increase the flow of 400 cfm to 500 cfm by decreasing pressure to 7.5 psi? i have tried by regulating pressure switch . but there is no change in cfm. i need to know how can i increase the cfm of my compressor?
Unless you want to get into the physics side of it to understand why, and I don’t, it’s simpler for me just to understand that the higher the pressure output from a compressor, the lower the flow.
Your compressor is rated for 400 CFM at 7.5 bar you say, yet you are running it at 10 bar.
So, if you turn down the output pressure regulator to 7.5 bar from 10, your flow volume should increase to the 400 CFM as per the specs, if the compressor is running at efficiency.
In theory, and maybe practically too, if you don’t need air at 7.5 bar, turn the regulator down a little lower, and that should give you even more air flow at that lower setting… up to the maximum capacity of the compressor at that pressure, whatever that may be.
…is determined by the pump (screw) and the HP into it. So, the only way to increase flow is to increase power input. You can’t do that.
However, I’m driven to ask why you want to do this – depending on your needs, a storage tank may get you what you need, if you don’t require a *continuous* flow at the higher rate.
Exactly what Bill says
What you need to find out is what tools/machines are you running? Do they actually need 10 Bar or even 7.5 Bar.
If you’re only using air tools then I’m sure you can turn it down but if you’re using CNC machines for example and they need the 10 Bar then you may need to ask yourself whether your compressor is powerful enough to cope?
What is your compressors power rated at, 5.5 kw? 7.5kw? More?
Let us know?
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