Flowmeter/ Regulator Operation - ESAB fabricator 141i Service Manual

ESAB FABRICATOR 141i

4.09 Flowmeter/ Regulator Operation

With the flowmeter/ regulator connected to cylinder or pipeline, and the adjustment screw/knob fully disengaged, pressurize as
follows:
1. Stand to one side of flowmeter/ regulator and slowly open the cylinder valve. If opened quickly, a sudden pressure surge
may damage internal parts.
2. With valves on downstream equipment closed, adjust flowmeter/ regulator to approximate working pressure. It is recom-
mended that testing for leaks at the flowmeter/ regulator connection points be carried out using a suitable leak detection
solution or soapy water.
3. Purge air or other unwanted welding grade shielding gas from equipment connected to the flowmeter/ regulator by
individually opening then closing the equipment control valves. Complete purging may take up to ten seconds or more,
depending upon the length and size of the hose being purged.
Adjusting Flow Rate
With the flowmeter/ regulator ready for operation, adjust working flow rate as follows:
1. Adjust the gas flow rate. The recommended rate for MIG welding is 15-25 CFH. The recommended rate for LIFT TIG weld-
ing is 10-25 CFH.
NOTE!
It may be necessary to re-check the shielding gas flowmeter/ regulator flow rate following the first
weld sequence due to back pressure present within shielding gas hose assembly.
Shutdown
Close cylinder valve whenever the flowmeter/ regulator is not in use. To shut down for extended periods (more than 30 minutes).
1. Close cylinder or upstream valve tightly.
2. Open downstream equipment valves to drain the lines. Bleed gas into a well ventilated area and away from any ignition
source.
3. After gas is drained completely, disengage adjusting screw and close downstream equipment valves.
4. Before transporting cylinders that are not secured on a cart designed for such purposes, remove flowmeters/ regulators.
Put caps on all cylinders that do not have flowmeters/ regulators on them.
OPERATION
Wire Reel Brake Adjustment Nut
Figure 4-12: Wire Reel Brake
Art # A-10361
4-12 Manual 0-5448