Maintenance Instructions: Check Valves
Leak test Check Valves at least every six months, as follows:
1. Shut off fuel gas supply and disconnect hose from check valve.
2. Set oxygen regulator to 0.5 bar, open all gas valves on torch or cutting attachment.
3. Plug tip and check for reverse flow to fuel gas check valve. Use soapy water or immerse in
water to check for leaks. Set pressure to zero after test.
4. Reconnect fuel gas hose and disconnect oxygen hose.
5. Repeat Steps 2 and 3 using fuel gas regulator as pressure source.
6. Reconnect hoses and purge system before use.
Regulator Test
A leak test of the regulators may be made as follows: (Also see your “Regulator Instruction
Manual”.)
1. Shut off fuel gas regulator by turning adjusting key counter-clockwise until loose.
2. Close fuel gas cylinder valve.
3. Close fuel gas torch valve.
Note: Watch cylinder pressure gauge for several minutes. A pressure drop indicates a leak in the
inlet side. Tighten connection and recheck. Also watch the delivery pressure gauge. A rise in
pressure indicates a leak in the regulator valve. If leak cannot be stopped - DO NOT USE THE
REGULATOR. All gauges should read zero when the pressure is removed. If they do not, the
gauges may be damaged. If damaged, check system for cause of damaged gauges. Have the
damage repaired by a qualified repairmen, replacing the damaged gauges. Repeat procedure
shown above for the oxygen regulator.
Cleaning Gauges
The gauge crystals are made of Lexan®. Use only soapy water to clean, then wipe dry using soft
cloths. Do not use solvents. General Electric Co®.
Changing Cylinders
A cylinder is depleted and is considered empty when it is unable to deliver fuel gas or oxygen
to torch tip at the set pressure.
1. Close supply valve of depleted cylinder and bleed off all gas in depleted line at torch. Close
torch valve.
2. Disconnect hose and regulator from depleted cylinder.
3. Screw Valve Protection Cap onto cylinder, mark “Empty,” and remove.
4. Follow procedure under Set-Up Instructions with the new cylinder.
5. Purge system.
Purging System
Warning: Purge only in a well ventilated area. Do not direct flow of any gas towards any person
or any flammable materials. Do not purge near open flames or any source of ignition.
1. Slowly open oxygen supply valve, then open fully and adjust regulator to proper pressure with
torch valve closed.
2. Open torch valve and allow gas to flow about one second for each 3 metres of hose. Close
torch valve after purging.
3. Slowly open fuel gas supply valve not more than one full turn, then adjust regulator to proper
pressure with torch valves closed.
4. Open torch valve and allow gas to flow about one second for each 3 metres of hose. Close
torch valve after purging.
Torches and Cutting Attachments
1. Periodically check for leaks, using soapy water or by immersing in water and checking for
bubbles.
2. Tighten connections and packing nuts to stop leaks. Do not use excessive force.
Storage : When not in use, store the equipment in a clean and safe place.
Troubleshooting
Figure 14. Excercise 1
Figure 15. Excercise 2
Exercise 2
1. Place two pieces of 3 mm steel together as shown in Figure 15.
2. Make the puddle again and with a back and forth torch motion, move the puddle along the seam. Go slowly to get
good penetration.
Note: This can be checked by turning parts over. The penetration should be visible from the bottom side. Test the
weld strength by attempting to tear the parts apart.
Proper Flame. A neutral flame (Fig. 13) is used for almost all gas welding. The oxy-acetylene flame consumes all
oxygen in the air around the welding area, which leaves an uncontaminated weld area and a weld of maximum strength.
An oxidizing flame is rarely used, but a carburizing flame is occasionally helpful when flame hardening or brazing.
Welding Rod. Welding rods are available for
all types of welding, including mild steel, cast iron and aluminum, in the
following sizes: 1.6 mm, 2.4 mm, 3.2 mm, 4 mm, 5 mm, 6.3 mm. The size needed will be determined by the type of
weld, the thickness of the metal, and the amount of filler metal required.
Gas Welding Practices and Exercises. Gas welding is not a difficult art. The following exercises of torch movement
are good practice, and make subsequent welding easy.
Exercise 1
1. Take a small welding tip and set proper pressures.
2. Point flame directly into steel (Fig. 14) (3 mm stock recommended) with the flame cone just above the metal
surface.
3. When a puddle is formed, move torch back and forth and move the puddle across the steel. Do this slowly.
4. It is necessary to have good penetration, and this comes from a deep puddle. It is helpful to lean the tip about 45º
away from the direction you want the puddle to move.
Bronze Brazing. Bronze is less expensive than silver alloy and should be used when
the fit between the metals to be joined is not close. The metals must be well
cleaned, then the flame is played onto them until they become a dull red color.
Both pieces must be of equal temperature or the rod will flow to the hotter piece
.
Heat the rod by placing it in the flame, then dip into the flux can. Notice that the
heat causes the flux to stick to the rod. If prefluxed rod is used, this heating and
dipping step may be eliminated. Once the rod is fluxed, and the metals brought to
the proper temperature, touch the rod to the joint, put the flame onto the rod, and
melt it. The rod then melts and flows over the heated area, bonding the metal to-
gether. Abundant flux must be used. Without enough flux, the rod will not “stick”
to the metals.
Silver Brazing. Silver brazing is a little faster than bronze brazing. This is because silver alloy melts at a lower temper-
ature, and less heat is required; however, the joint must fit tightly. Bronze bridges a gap much better than silver alloy.
Instead of putting flux on the rod, the joint shou
ld be painted with the flux. The way to determine when the metals are
at proper temperatures is to watch the flux. when it bubbles, it is time to apply the rod. The rod melts as it is touched
to the metal and flows over the fluxed area.
Steel Flame Cutting. Steel flame cutting (Fig. 19) is a simple process that can be quickly mastered. Only carbon steel
can be cut with the oxy-fuel gas method, since ca
st iron, stainless steel, aluminum, brass and other ferrous metals do
not burn the way steel does.
The way to cut steel is to heat it to its kindling temperature (a red color), and then burn it rapidly with pure oxygen. A
cutting torch provides both the preheat flames and pure oxygen cutting stream. Fuel gas and oxygen are combined in the
torch head and burn at the torch tip with a flame temperature of 2200°-3300° C. These are the preheat flames. The center
hole in the cutting tip is for the pure oxygen, which flows through to cut the steel after the metal is sufficiently preheated.
Note: Cutting tips are available in a variety of styles and a wide range of sizes. The proper size is to be determined by
the material thickness to be cut. Refer to the current product catalog, Tip Chart (P/N 9500593) or our website at
www.harrisproductsgroup.com for a complete listing of sizes and pressure settings.
Cutting Tip Chart
place to word document (i don’t hav)
Note:
1. The correct cutting speed is accompanied by a sputtering sound, and a steady stream of sparks. This results in a
clean, slagfree cut with square top and bottom edges (A, Fig. 20).
2. Too fast a movement does not allow enough time for the oxyg
en stream to cut all the way through the metal. slag
fills the kerf and the two pieces are not severed (B, Fig. 20).
3. Too slow a movement leaves a rounded top edge with slag sticking to the bottom of the metal (C, Fig. 20).
4. The size of the preheat flame (D, Fig. 20) determines how quickly the cut can be started. Often, a small preheat flame
is desirable to conserve gases and prevent melting of the top edges.
A. Perfect cut shows regular surface with slightly sloping drag lines. Surface can be used
for many purposes without machining.
B. Extremely fast not enough time is allowed for slag to blow out of the kerf. Cut face is
often slightly concave.
C. Extremely slow produces pressure marks which indicate too much oxygen fro cutting
conditions.
D. Preheat too hot rounded top edge caused by too much preheat. Excess preheat does
not increase cutting speed. It only waste gas.
Maintenance Instructions: Check Valves
Leak test Check Valves at least every six months, as follows:
1. Shut off fuel gas supply and disconnect hose from check valve.
2. Set oxygen regulator to 0.5 bar, open all gas valves on torch or cutting attachment.
3. Plug tip and check for reverse flow to fuel gas check valve. Use soapy water or immerse in water to check for leaks.
Set pressure to zero after test.
4. Reconnect fuel gas hose and disconnect oxygen hose.
5. Repeat Steps 2 and 3 using fuel gas regulator as pressure source.
6. Reconnect hoses and purge system before use.
Regulator Test
A leak test of the regulators may be made as follows: (Also see your “Regulator Instruction Manual”.)
1. Shut off fuel gas regulator by turnin
g adjusting key counter-clockwise until loose.
2. Close fuel gas cylinder valve.
3. Close fuel gas torch valve.
Note: Watch cylinder pressure gauge for several minutes. A pressure drop indicates a leak in the inlet side. Tighten
connection and recheck. Also watch the delivery pressure gauge. A rise in pressure indicates a leak in the regulator
valve. If leak cannot be stopped - DO NOT USE THE REGULATOR. All gauges should read zero when the pressure is re-
moved. If they do not, the gauges may be damaged. If damaged, check system for cause of damaged gauges. Have
the damage repaired by a qualified repairmen, replacing the damaged gauges. Repeat procedure shown above for the
oxygen regulator.
Cleaning Gauges
The gauge crystals are made of Lexan®. Use only soapy water to clean, then wipe dry using soft cloths. Do not use
solvents. General Electric Co®.
Changing Cylinders
A cylinder is depleted and is considered empty when it is unable to deliver fuel gas or oxygen to torch tip at the set
pressure.
1. Close supply valve of depleted cylinder and bleed off all gas in depleted line at torch. Close torch valve.
2. Disconnect hose and regulator from depleted cylinder.
3. Screw Valve Protection Cap onto cylinder, mark “Empty,” and remove.
4. Follow procedure under Set-Up Instructions with the new cylinder.
5. Purge system.
Purging System
Warning: Purge only in a well ventilated area. Do not direct flow of any gas towards any person or any flammable ma-
terials. Do not purge near open flames or any source of ignition.
1. Slowly open oxygen supply valve, then open fully and adjust regulator to proper pressure with torch valve closed.
2. Open torch valve and allow gas to flow about one second for each 3 metres of hose. Close torch valve after
purging.
3. Slowly open fuel gas supply valve not more than one full turn, then adjust regulator to proper pressure with torch
valves closed.
4. Open torch valve and allow gas to flow about one second for each 3 metres of hose. Close torch valve after
purging.
Torches and Cutting Attachments
1. Periodically check for leaks, using soapy water or by immersing in water and checking for bubbles.
2. Tighten connections and packing nuts to stop leaks. Do not use excessive force.
Storage : When not in use, store the equipment in a clean and safe place.
Troubleshooting
Cutting
1. Make certain that correct tip is tightly secured in the torch head.
2. Set proper pressure on regulators.
3. Lighting Procedures:
Cutting Attachment. Always open oxygen valve wide on torch handle. Follow
lighting procedure in welding torch instructions, using fuel gas valve or torch
handle and preheat oxygen valve on cutting attachment to adjust preheat flames.
Cutting Torch. Use the same procedure as in welding torch instructions. After setting flame, depress cutting oxygen
lever and open pr
eheat oxygen valve slightly to re-set flame.
4. Move flame to edge of steel and position preheat cones just above metal.
5. When steel becomes red, slowly depress cutting oxygen lever to release oxygen stream to cut through steel.
6. Slowly move torch in direction of the cut.
Exercise 3
Note: Repeat Exercise 2, but add welding rod this time.
1. While flame is directed at the steel in order to form the puddl
e, put rod into the flame (Fig. 16).
2. When rod gets red, maintain this temperature by moving it in and out of the flame. Once the weld is started, dip into
the puddle. this builds up the weld so that the top is rounded instead of concave as when no rod was used.
Note: Remember, welding rod is necessary on all double joints and once the welder is experienced, he will prefer to
use rod on all welds, regardless of how thin the steel.
3. Material 5 mm or thicker should be bevelled before welding. A 30º bevel (Fig. 17) on each piece is best. This is nec-
essary to obtain good penetration through the entire thickness. A rod is necessary filler metal on all welds made from
bevelled edges. Once the torch movement and puddle control are mastered, the welder can make vertical, horizontal,
or flat welds. He now has a tool that will repay its cost many times over.
Figure 16. Excercise 3
Figure 17. Proper 30 Degree bevel for welding
Braze Welding
Braze welding (FIg. 18) differs from gas welding because the two pieces of metal are not fused together. The brazing
rod melts at a lower temperature than the parent metal, and the braze strength comes from the surface overlay of the
brazing rod.
The advantage of braze welding over gas welding is that it is the best way to join dissimilar metals, or repair cast iron.
For instance, braze welding is the correct way to fix a pump water jacket. Almost any two metals can be joined, except
aluminum and magnesium. Braze welding is separated into two types, depending on the type of rod used.
Figure 18. Braze Welding
Figure 19. Steel Flame
Cutting
TROUBLE PROBABLE CAUSE REMEDY
Welding tip popping
• Tip is operated at too
low heat valve
• Tip too large
• Too close to work
• Increase pressures,
and consult
appropriate tip chart
• Use smaller size tip
•Raise tip from work
Flames not clearly de-
fined, smooth or even
Dirty tip
Clean with tip cleaner
or replace tip
Regulator not holding
constant pressure
Defective seat
Return unit for
replacement
Cutting tip popping Too loose Nicked seat Tighten tip nut
Leak around needle
valve
Packing nut loose Tighten packing nut
Dificult to light Too much Pressure
Consult appropriate tip
chart
Flame change when
cutting
• Oxygen needle valve
on torch handle partl
closed
•Oxygen cylinder al-
most empty
• Open oxygen valve
wide
• Replace cylinder with
full one
NEUTRAL
White
Nearly Colorless
Nearly Colorless
Light Orange
Bluish to Orange
Bluish to Orange
OXIDIZING
White
CARBURIZING
Intense White
with Feathery Edge
White
Figure 13. Neutral, Carburizing and oxidizing Flames
9505643 REV D_2012-new_Layout 1 2012-02-28 12:00 Page 2
Introducción
Estas instrucciones están hechas expresamente para operadores experimentados y para aquellos que trabajan
con la supervisión de soldadores expertos. La operación y el mantenimiento del equipo para soldar y cortar debe
cumplir con las disposiciones de la Norma Nacional de los Estados Unidos, “Seguridad al soldar y cortar”. Para
un uso seguro, de acuerdo con las especificaciones tecnicas, respetar las instruciones y recomendaciones de
seguridad del fabricante
IMPORTANTE
MEDIDAS DE PREVENCIÓN
Lea todas las instrucciones
Aviso:
Al usar sopletes para soldar o cortar, siempre deben tomarse precauciones de seguridad para reducir el riesgo de
incendio y heridas, incluyendo las siguientes:
1. Use vestimenta protectora. Siempre use gafas para soldar para proteger sus ojos de las chispas y los rayos de
luz. Use guantes y ropa que lo proteja. Tenga cuidado con las chispas en las mangas. No use guantes aceitosos. No
tenga encendedores, fósforos u otros objetos inflamables en los bolsillos mientras suelde o corte.
2. Maniobre los cilindros con cuidado. Sujete con cadenas o asegure los cilindros para que permanezcan fijos.
Tenga cuidado al moverlos. Para transportar cilindros (excepto cuando están en un carro para cilindros), retire
los reguladores y reemplace con tapas de válvulas. Nunca use los cilindros en otra posición que no sea vertical.
3. Use “Buenas prácticas de orden y limpieza” en la zona de trabajo. Mantenga las chispas y la llama alejadas de
los combustibles. Prepare la zona de trabajo antes de soldar o cortar.
4. No aceite ni engrase el equipo. El equipo no necesita lubricación. El aceite y la grasa se prenden fuego fácil-
mente y se incendian con violencia en la presencia del oxígeno.
5. “Fuerce” la válvula del cilindro de oxígeno antes de instalar el regulador. Abra la válvula apenas y luego ciérrela.
Esto quitará el polvo o la suciedad de la válvula para que no se dirijan al regulador y no causen daños o accidentes.
No dirija el flujo de gas a personas o materiales inflamables.
6. Asegúrese de que todas las conexiones estén ajustadas. No fuerce las conexiones. Nunca compruebe si hay
pérdidas con una llama. Use una solución de jabón espumoso y compruebe las burbujas.
7. Purgue los pasajes de oxígeno y gas combustible por separado antes de encender el soplete. Esto ayudará a
prevenir una mezcla inadecuada de gases.
8. Use los ajustes de presión recomendados. El uso de la presión inadecuada es un derroche. Mucha presión en los
reguladores es una señal de que necesitan repararse.
9. Nunca use oxígeno o gas combustible para sacudir el trabajo, el equipo o la ropa. El oxígeno puro permite la
combustión y una chispa puede prender fuego la ropa saturada de oxígeno.
10. Purgue el sistema después de usarlo. Al apagarlo, cierre las válvulas del cilindro, luego purgue el sistema
vaciando ambas mangueras por separado. Primero, abra la válvula de aguja de oxígeno “OX” del soplete, drene
la línea hasta que la presión llegue a cero y luego cierre la válvula de aguja de oxígeno. Repita el proceso con la
válvula de aguja de “GAS” combustible del soplete.
11. No trabaje con equipos dañados o con pérdidas. Use jabón espumoso para detectar pérdidas. No use manguer-
as desgastadas o dañadas. Nunca use el soplete como martillo para quitar la escoria del trabajo.
12. Maniobre el equipo con cuidado. El buen estado del equipo y su seguridad dependen de esto.
13. Mantenga la zona de trabajo bien ventilada. Los materiales inflamables se incendian con violencia cerca del
oxígeno. Deben evitarse las llamas y los materiales incandescentes (fumar tabaco) al usar oxígeno.
14. Al trabajar con acetileno. Nunca lo use a presiones mayores a 1.5 bar (Kg/cm
2
).
15. No fuerce los conectores ni las roscas. Las diferencias son intencionales para los distintos gases.
16. Nunca encienda un soplete con fósforos o un encendedor. Use siempre un percutor
17. Siempre tenga en cuenta a aquellos a su alrededor al usar un soplete.
18. Tenga cuidado de no dejar que las mangueras de soldar entren en contacto con las chispas de la llama del
soplete del corte o el metal caliente.
NOTA: GUARDE ESTAS INSTRUCCIONES
Instrucciones de instalación
Acoplamiento de reguladores, mangueras y soplete
(NO SE INCLUYE LA LLAVE INGLESA)
1. Si los usa, coloque los cilindros de gas en posición vertical.
Nota: Verifique el contenido de los cilindros antes de comenzar para asegurarse de que la reserva es la adecuada
para el ciclo operativo a llevar a cabo.
2. Abra la válvula del cilindro (Fig. 1) apenas para quitar la suciedad, luego ciérrela. NO dirija el flujo de gas a
personas o materiales inflamables.
3. Acople los reguladores (Fig. 2 y 3) usando conexiones de entrada estándar AGC y ajuste con firmeza.
4. Acople las mangueras a los reguladores (Fig. 4) y ajuste.
Nota: Las conexiones de la manguera de gas combustible son las tuercas de la izquierda y las de oxígeno son las
tuercas de la derecha.
5. Acople la manguera de gas combustible a la válvula del soplete (Fig. 5) que marca “Gas” (tuerca de la izquierda).
6. Acople la manguera de oxígeno a la válvula del soplete que marca “OX” (tuerca de la derecha).
7. Instale la boquilla del tamaño correcto (Figs. 6 y 7) para los espesores de metal a ser soldados o cortados.
Asegúrese de que el asiento de la boquilla no tenga muescas ni rebabas. Las boquillas para soldar sólo deben
ajustarse manualmente. Las boquillas para cortar deben ajustarse con una llave inglesa.
8. Cierre ambas válvulas del soplete (Fig. 6) (en sentido horario) antes de abrir los cilindros.
Ajuste de presión
Para identificar sopletes de igual presión o presión universal, ajuste a 2 bar la reserva de oxígeno, desconecte la
manguera de gas combustible y la válvula de retención con el accesorio para mezclar o cortar del soplete. Abra
todas las válvulas de gas y verifique la entrada de gas combustible. Si hay presión, el equipo es del tipo de igual
presión. Si nota succión, el equipo es del tipo de presión universal. Vuelva a conectar la válvula de retención y la
manguera y purgue por completo antes del encendido.
Nota: 1. Para sopletes de igual presión (a veces llamados “de presión media”). Este equipo necesita presiones de
gas combustible mayores a 0.1 bar. La presión positiva se usa para mezclar gas combustible con oxígeno.
2. Para sopletes de presión universal (a veces llamados “de presión baja”). Este equipo funciona con menos de
0.1 bar de presión de gas combustible. El oxígeno, bajo presión, provoca succión que lleva el gas combustible
dentro de la cámara mezcladora.
1. Asegúrese de que ambas llaves de ajuste del regulador (Fig. 8) estén libres, girándolas en sentido antihorario
hasta que se aflojen.
2. Abra lentamente la válvula del cilindro de gas combustible (Fig. 9) con no más de una (1) vuelta y ajuste la llave
del regulador en la presión de operación necesaria. Mantenga la empuñadura o llave inglesa en el cilindro para
cerrar rápidamente.
Figura 3. Acoplamiento
del regulador de gas combustible
Figura 2. Acoplamiento
del regulador de oxígeno
Figura 1. Apertura de la válvula
de oxígeno del cilindro
Figura 5. Acoplamiento
de la manguera al soplete
Figura 4. Acoplamiento
de la manguera al regulador
Figura 7.
Instalación de la boquilla para cortar
Figura 6. Instalación
de la boquilla para soldar