Measuring Torch Gas Flows - ESAB PT-26 Manuel D'instruction

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Measuring torch gas flows

If low gas flow is suspected of causing poor cutting performance or short consumable life, the flow can be
checked by using Plasma Torch Flow Measuring Kit. The kit includes a hand held rotameter (flowmeter) which
will indicate the gas flow rate exiting the torch. The kit also includes a set of instructions which should be fol-
lowed exactly to insure safe and accurate use of the rotameter. See form F-14-391.
The PT-26's air or nitrogen flow rates should be as follows:
Shield Flow
ESP-150 & ESP-200 ..........................................................135 - 145cfh @ 50 psig (63.7 - 68.4 l/m @ 3.4 bar)
Deuce Pack 150, 215 ......................................................................... 225 cfh @ 50 psig (106.2 l/m @ 3.4 bar)
Plasma Flow .....................................................................................115 - 140 cfh @ 50 psig (54.3 - 66.1 l/m @ 3.4 bar)
Total Flow
ESP-150 & ESP-200 ....................................................250 - 285 cfh @ 50 psig (118.0 - 134.5 l/m @ 3.4 bar)
Deuce Pack 150,330 .........................................................................365 cfh @ 50 psig (172.3 l/m @ 3.4 bar)
Measure the flow rates using a new 200 amp nozzle (0558003798), a new electrode and a new heat shield. Make
sure that all parts are properly installed and that the torch o-ring (0558003721) is in good condition and not leak-
ing. Measure the flows individually if possible, if not measure the total.
Gas flow rates less than those above indicate a restriction or a leak in the gas plumbing of the torch or power
source.
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