- Thread starter mrcheese
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cumbriasteve
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My educated guess is the second..it's measuring the flow as it passes through rather than the pressure on the gauge when not being used.
Paul.
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The second gauge is just a pressure gauge supposedly calibrated for flow, they tend not to be very accurate, for a better idea of what the actual flow at the torch is you would be better to use a peashooter like this one http://www.weldequip.com/gas-flow-tester.htm
You could also fit a proper flowmeter to the regulator here's one http://www.weldequip.com/flowmeter.htm
For some hints on how to set it all up have a look at the, wiki page here http://www.mig-welding.co.uk/wiki/Setting_up_the_gas.
You could also fit a proper flowmeter to the regulator here's one http://www.weldequip.com/flowmeter.htm
For some hints on how to set it all up have a look at the, wiki page here http://www.mig-welding.co.uk/wiki/Setting_up_the_gas.
GrahamGKD
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I guess the second gauge is calibrated for flow by making some assumptions about the flow resistance though the pipework, welder and torch? I use the flow-meter suggested by Paul on my TIG set up but I haven't got around to getting one for the MIG yet.
shenion
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Not the pipework, but a restriction in the output port of the regulator. My Weldit regulator actually said 'flow for 0.029" orifice' on the gauge itself. This will likely be the largest restriction.
You can debate if it should be set with the flow on or off. On a good regulator it should not change much. Seems the gauge is always set up where there is a Venturi effect so it reads less when there is a flow.
