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High MIG Gas Pressure.mp4

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Published on Jan 4, 2010

High Gas pressure in a MIG Gas Delivery System causes excess gas to be stored when welding stops. A FREE technical paper is available at www.NetWelding.com that covers the details and why it must be high to compensate for pressure drops that occur in production. This video provides a quick overview.
This excess blasts out of the MIG gun nozzle when welding starts causing very high gas flow rates that produce very turbulent gas stream. This turbulent stream causes air to mix with the gas creating excess spatter and poor weld quality. It takes a short time for the turbulent stream to return to a laminar quality shield even when the flow rate returns to a lower level.
However to maintain preset gas flow the pressures must be high, greater than 25 psi, to maintain Choked Flow flow control. The solution to the gas waste and inferior weld starts while maintaining this high pressure is to use our patented Gas Saver System. It stores 80% less gas and has a peak flow control orifice that limits the starting gas flow rate.

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