OPERATING INSTRUCTIONS for
Regulator
Model
P/N
R-72-75-540
21524
R-72-125-540
21528
R-72-15-510
21525
R-72-15-300
21526
R-72-75-510
21527
R-72-75-320
0558005410
R-72-75-580
0558005415
R-72-125-580
0558005416
CGA-022 (formerly "B"oxygen)-9/16-in.-18 RH male connection.
CGA-023 (formerly "B" fuel gas)-9/16-in-18LH male connection
* LFG - Liquefied Fuel Gas such as FG-2, propane, methyacetylene-
propadiene (MPS), propylene-based fuel gases, butane, etc.
These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of operation and safe practices
for oxy-fuel gas equipment, we urge you to read our booklet, "Precautions and Safe Practices for Gas Welding, Cutting, and Heating",
Form 2035. Do NOT permit untrained persons to install, operate, or maintain this equipment. Do NOT attempt to install or operate this
equipment until you have read and fully understand these Instructions. If you do not fully understand these Instructions, contact your
supplier for further information.
The regulators covered by these Instructions are listed by Underwriter's Laboratories only when using parts manufactured by ESAB
Welding & Cutting Products to the specifications on file with Underwriter's Laboratories, Inc., and when they are used in the gas service
for which they are designed and listed. The use of other parts that cause damage or failure to the equipment will void the manufacturer's
warranty.
IMPORTANT: For packing purposes, the pressure-adjusting
screw of the regulator may be either turned in or packed
separately. If installed in regulator, back out screw (turn
counterclock-wise) until it turns freely. If packed separately,
install the screw in the regulator cap and turn it in (clock-
wise) only one or two turns.
Be sure this information reaches the operator. You can
get extra copies through your supplier.
R-72 SERIES
CYLINDER REGULATORS
Gas
Connection, CGA No.
Service
Inlet
Oxygen
540
Oxygen
540
Acetylene
510
Acetylene
300
LFG*
510
C0
320
2
Inert Gas
580
Inert Gas
580
Rated Max.
Delivery
Outlet
Pressure, psig
022
75
022
125
023
15
023
15
023
75
034
75
032
75
0.25 in.
125
37
0
Flare
NOTE:
Hoses used with these regulators should have a working pressure
at least equivalent to the maximum gauge reading, with a safety
factor of at least 3 to 1.
For Safety Precautions, Installation, & Op-
erating Instructions, see other side.
F15-156
June, 2006
Pressure Gauge, psig
Cylinder
Delivery
4000
100
4000
200
400
15
400
15
—
100
Call for info.
Call for info.
4000
100
4000
200