INSTRUCTIONS for
V-24 OXYGEN LANCE VALVE
V-24 Oxygen Lance with 1/8" Pipe Holder ................................ 9728D65 ........................... 2218939
V-24 Oxygen Lance with 1/4" Pipe Holder ................................ 9728A65 ........................... 2218938
V-24 Oxygen Lance with 3/8" Pipe Holder ................................ 9728B65 ........................... 2218937
V-24 Oxygen Lance with 1/2" Pipe Holder ................................ 9728C65 ................................ —
V-24 Oxygen Lance Valve only .................................................... 06X78 .................................. —
steel mill and foundry applications include scrap cutting,
lancing tap holes, and piercing heavy iron or steel sections
available with quick-disconnect pipeholders with neoprene
seals sized for 1/8", 1/4", 3/8", or 1/2" NPT schedule 40 black
iron pipe
lever-operated valve for dependable ease-on and quick-
shutoff of oxygen
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 your distributor. 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.
F-4737-T
October, 2003
w/“C”-Size Inlet w/“B”-Size Inlet
equipped with “C”-size oxygen fitting (CGA-024) for con-
necting 1/2-in. I.D. hose and “B”-size (CGA-022) for use with
3/l8-in. I.D. hose
recommended regulator: R-52 oxygen regulator and filter
combination — P/N 2116015 for “C” size inlet; R-76-150540 oxygen regulator — P/N 998324 for “B”-size inlet
CONNECTING & OPERATING
1. Connect a suitable length of hose (hose and fittings
must be clean and suitable for oxygen service) to
the V-24 valve and to the regulator outlet. Tighten
the connections firmly with a wrench.
2. Insert a suitable length of oil and grease free black
iron pipe (10 to 12 ft. is usual) into pipeholder and
tighten pipeholder by hand.
Use only schedule 40 black iron pipe. Use of other
lance pipes can result in serious injury
3. Make sure the pipe is fully seated. If necessary
to make up pipe joints, apply a single turn of Teflon
tape on all male pipe threads.
LIGHTING
The oxygen lance differs from a standard cutting torch
in that there are no preheat flames to maintain the steel
at the kindling point. It is also different from the standard torch because once the cutting has started the lance
pipe itself burns and helps furnish the heat necessary to
sustain the cut.
The pipe continues to burn so long as the oxygen
remains ON.
Always start the lance with low oxygen pressure and
flow. Excess oxygen can cause uncontrollable molten spatter that can cause serious burns.
There are three basic ways to light the lance and start
cutting.
1. Heat the end of the lance pipe until red-hot. Done in
a number of ways, a cutting or welding torch being
the easiest, or
2. Heat a starting spot red-hot on the metal to be lanced,
or
3. Place a piece of red-hot metal over the area to be
lanced.
Regardless of the method selected, start with a small
stream of oxygen passed through the lance pipe. About
5 psi oxygen set at the supply regulator is all that is
needed to start the lancing process. After initiating the
cut the oxygen pressure can slowly be increased to nominal flow.
Be sure this information reaches the operator.
You can get extra copies through your supplier.
OPERATING
When starting operations with the oxygen lance it is desirable to have two workmen, one to operate the lance
and the other to slowly bring up the oxygen pressure at
the oxygen supply regulator. Only a few psi of oxygen
are necessary to start lancing and this pressure is then
increased as the lance penetrates the metal. When the
lancing process is up to nominal oxygen pressure, only
one operator is needed for lance control.
OXYGEN LANCING PRESSURE
NOTE: Pressures at the regulator are given.
b. Pressurize the lance valve to 100 psig using ni-
trogen or clean, oil free air.
c. Slowly depress lance valve lever so that the
valve is completely pressurized. Do NOT point
or direct lance valve toward any part of body.
d. Using Leak Test Solution, P/N 998771, check
for leaks at all joints and fittings and at the lever
valve assembly. Bubbling of the solution indicates leakage. Do NOT operate until leakage
has been corrected. Operating with leaking
equipment is a potential fire hazard.
e. Remove the cap.
After the lancing process is initiated, set the desired oxygen pressure (see table below) at the regulator. Follow
all instructions provided by the regulator manufacturer.
Proper flow of oxygen is required for safe operation
and good performance. Regulators must be set to
the correct pressure and the hose must have enough
capacity (Hose that is too long, too small or hose
connector with a small bore will cause problems.)
Nominal Oxygen Flow, cfh (m3h)
through a 10-ft. length of pipe
Inlet (with no internal obstructions)
Pressure 1/8" 1/4" or above
psig (bars) cfh (m
40 (2.8) 1200 (34) 1900 (53.8)
60 (4.1) 1700 (48.1) 2300 (62.1)
80 (5.5) 2200 (62.3) 3000 (85)
100 (6.9) 2700 (76.5) 3700 (105)
Max. operating pressure — 100 psig (6.9 bars).
Pipe Size (Std. Schedule 40)
3
h) cfh (m3h)
Maximum oxygen lancing pressure is largely dependent
on thickness and composition of steel being lanced.
Medium-carbon steels up to 0.50 per cent carbon - up
to 75 psi; Low -carbon (mild) steels - up to 100 psi.
Protect body, face, and head from sparks and spatter. Use fire and heat resistance protective clothing,
face shields, head gear and other protective equipment made particularly for scarfing and lancing operations.
Do not use oil on this apparatus. Oil and grease are
easily ignited and burn violently in the presence of
oxygen under pressure.
REPLACING VALVE ASSEMBLY
If leakage develops around the valve stem or between
the valve guide and the V-24 body, or if the valve fails to
shut off completely, refer to Fig.1 and proceed as follows:
1. Remove valve lever by merely driving out the fulcrum roll-pin, using a drill or piece of rod (7/32in. diam. or smaller).
2. Unscrew valve guide and lift out entire valve assembly: guide (with external and internal O-rings), valve
stem, spring, and O-ring retaining washer.
3. Install new valve assembly (2119322), and tighten
firmly with a wrench.
4. Reinstall the lever assembly.
OPERATING PRECAUTIONS
In addition to the precautionary measures in ESAB’s
booklet, Form 2035, particular attention should be given
to the following:
1. All new V-24 lance valves are factory tested for leaks.
Valves should be leak tested by users on a periodic
basis as follows:
a. Seal the exit end of the lance valve pipeholder
using a suitable length of pipe with a threaded
cap. Then tighten the capped pipe in the
pipeholder.
REPLACEMENT PARTS
zz
z Maintain lance assembly in good condition.
zz
zz
z Use ONLY replacement parts shown. Use of other
zz
parts can result in serious injury.
Replacement parts are illustrated in Figs. 1 and 2. Please
supply both description and part number when ordering.
Do not order by part number alone.
2
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