Flow Meter - Lincoln Electric POWER FEED 25M Operator's Manual

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POWER FEED 25M & 25M ALUMINUM

FLOW METER

The flowmeter shows the flow rate of shielding gas and has a
valve to adjust the flow. The flow meter is scaled for CO
and CO /Ar blends. It is not calibrated and is for reference
2
purposes only. The middle of the ball indicates the flow rate of
shielding gas.
Adjust the flow rate while depressing the GAS PURGE switch by
turning the valve at the bottom of the meter. Most weld
procedures require 25-40 scfh (11.8 - 18.9 lpm) for sufficient
shielding gas coverage. Gun angle, nozzle diameter, joint
configuration and wind conditions may effect the amount of
shielding gas required.
When using a wire feeder with a flow meter, adjust the regulator
at the shield gas bottle or supply to a flow rate that is higher than
the flow rate indicated on the feeder flow meter. Note that most
regulators are calibrated based upon having low restrictions on
the outlet. The valve on the feeder flow meter creates a high
restriction and may cause errors in the readings at the supply
regulator. Set the gas flow rate using the feeder flow meter
reading and not the supply regulator reading.
To achieve maximum flow rate, use a regulator with 30 psi or
higher pressure compensation.
SCFH Liter/Min.
10 4.7
20 9.4
30 14.2
40 18.9
50 23.6
60 28.3
70 33.1
80 37.8
, Ar,
2
Ball
Valve
B-42
OPERATION