I am having total 6 compressor in different cfm and my total cfm is 4755. what size pipe i can use total feet 300
Are they all connected to one main pressure vessel/tank? If so, connect all compressors with a pipe of right diameter (according to that compresssors output) to the vessel.
From the vessel to the factory, use the total cfm for the calculation. Check the pipe sizing section of this website: http://www.air-compressor-guide.com/compressed-air-piping.html
Need help troubleshooting your air compressor?
I help compressor owners with compressor problems to quickly have their compressor up and running again.
My Air Compressor Troubleshooting Guide helps you to troubleshoot air compressor problems quickly and easily. I have included many flowcharts, diagrams and pictures. It’s almost like I’m there with you while we troubleshoot your compressor together.