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OPERATING INSTRUCTIONS for
September, 1998
F-15-307
R-27 SERIES "B" STATION REGULATORS
U. S. Patent No. 5,711,340
Regulator Connection Rated Max. Delivery Pressure
Gas CGA No.n Delivery Pressure Gauge (2-in.diam.)
Model Part No. Service Inlet Outlet psig kPa psig kPa
R-27-75-024 998961 Oxygen 024 022 75 520 100 690
R-27-15-025 998962 Acetylene 025 023 15 103 30 207
R-27-75-025 999133 Other FGw 025 023 75 520 100 690
R-27-75-034 999134 Inert Gasww 034 032 75 520 100 690
Maximum Inlet Pressure: 15 psig for the R-27-15-025 since acetylene pipeline pressure should never exceed 15 psig; 200
psig for all other station regulators.
n CGA-022 (formerly "B" oxygen) - 9/16-in.—18 RH male connection.
CGA-023 (formerly "B" fuel gas) - 9/16-in. —18 LH male connection.
CGA024 (formerly "C" oxygen) - 7/8-in. —14 RH female nut.
CGA-025 (formerly "C" fuel gas) - 7/8-in.— 14 LH female nut.
CGA-032 (formerly "B" inert gas) - 5/8-in. — 18 female connection.
CGA-034 (formerly "C" inert gas) - 7/8-in. —14 RH male nut.
w Other FG - Any fuel gas except acetylene (FG-2, propane, natural gas, hydrogen, etc.)
ww Inert Gas - Includes argon, helium, and nitrogen.
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. The same information appears in the "Oxy-Acetylene Handbook" which may be purchased from a ESAB
distributor. Do NOT permit untrained persons to operate this equipment. Do NOT attempt to 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 used in combination with 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 voids 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
F-15-307
out screw (turn counterclockwise)
until it turns freely, if packed separately, install the screw in the regulator cap and turn it in (clockwise)
only one or two turns.
TO CONNECT:
1. Open the station valve slightly, for an instant. (This
is termed "cracking the valve".) This will blow out
dust or dirt that may have collected in the valve
outlet. BE SURE to keep your face away from the
valve outlet to protect your eyes from dust or dirt.
Never crack a fuel gas valve near sparks,
flames, or any other possible source of ignition.
Hydrogen will sometimes ignite spontaneously
upon expanding into the atmosphere. Be ready
to close the valve immediately in case such
ignition should occur.
2. MAKE SURE the regulator pressure-adjusting
screw is released by turning it counterclockwise
until it turns freely.
3. Attach the regulator to the valve and tighten the
Be sure this information reaches the operator.
You can get extra copies through your supplier.
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connection nut with a wrench.
4. Open the station valve SLOWLY.
Never stand in front of or behind the regulator
when opening the valve. Always stand to one
side.
5. Attach the hose to the regulator outlet and to the
equipment with which it is to be used. Tighten the
connecting nuts with a wrench.
TO ADJUST PRESSURE:
1. To increase delivery pressure, turn the pressureadjusting screw clockwise. To decrease delivery
pressure, turn the pressure-adjusting screw counterclockwise.
2. When making the initial pressure adjustment, all
valves downstream of the regulator must be open
or you will not get a true working-pressure reading
on the delivery-pressure gauge.
IMPORTANT: Before starting operation, test all
connections with a Leak Test
Solution that is suitable for oxygen service, such as P/N 998771
(8 oz. container). Correct any
leaks before starting work. Testing should be performed after
torch or other gas-using device
has been properly connected,
with valve(s) downstream of
regulator closed, and with maximum delivery pressure (see
table) in the delivery line.
2. Open all valves downstream of the regulator.
3. Wait until the pressure has dropped to zero, then
turn the pressure-adjusting screw counterclockwise
until it turns freely.
NOTE: If a regulator is to be out of use for a
few days or more, turn in the pressureadjusting screw enough to move the
valve stem off the seat. When the regulator is returned to use, BE SURE to
back off the pressure adjusting screw
until it turns freely before pressure is
admitted to the regulator.
INLET FILTER MAINTENANCE:
Each regulator is equipped with a porous metal inlet
filter, P/N 71Z33, pressed into the regulator inlet nipple.
No regulator should be connected to a station valve
unless it contains this filter. You can replace the filter if
you have reason to do so. To remove a filter, insert a
No. 1 "EZY-OUT" or a No. 6 wood screw (about 2-in.
long) into the filter and pull it out. Press the new filter
into the nipple with a 1/4-in. round metal rod.
REPAIR SERVICE:
Regulators in need of repair should be returned to your
ESAB welding equipment distributor or to ESAB
Remanufacturing Center, 411 S. Ebenezer Road, Florence, SC 29501.
If you have your own properly-equipped and staffed
repair facility, repair parts information (F-15-300) for
this regulator is available on request to your distributor.
TO RELEASE PRESSURE:
If operations are to be stopped for a half-hour or more,
you should release all pressure from regulator. To do
this, proceed as follows:
1. Close the station valve.
F-15-307 9/98 1M Printed in U.S.A.
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