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[chem55]

I have an application where I am transferring Liquid material from Storage tank to Truck. After transferring the liquid material I need to flush the line by using Air.

Information:
Line size: 3" (300 ft line)

I am thinking of adding the pressure regaulator on Air line, and I would like to know the required air pressure and flow at the dicharge of the regulator. Inlet air pressure of the regulator is 120 psig.

Is there any criteria (velocity/presussure drop) for Pneumatic liquid transfer?

Thanks,