The Little Torch - Smith Equipment
Contents
1. 020c cece eee eee e eens 18 9 1 Rem ving Old TOS Ci sce eetere eae ha ete ete ae Whe eit E a 18 9 2 Installing New Hose 0 0 e eee nee 18 SECTION 10 REGULATORS ie cicn cee ieee a eke bee ee eee 19 SECTION 11 TECHNICAL DATA 0 00 c cece eee 20 11 1 Tip Specifications 232262025 2u eed degecc gi ededeided utes eagle os 20 11 2 Fuel Gas And Flame Characteristics 2 0 00 cece eee eee 21 11 3 Flame And Heat Placement BTU Output Per Cubic Ft Of Fuel Burned 21 11 4 Cylinder Valve Identification For Regulator Selection 21 SECTION 12 ACCESSORIES amp cei cee eee tere ne eee eee eek 22 WARRANTY SECTION 1 SAFETY PRECAUTIONS READ BEFORE USING OXY FUEL 2013 06 A Protect yourself and others from injury read follow and save these important safety precautions and operating in structions 1 1 Symbol Usage A DANGER Indicates a hazardous situation which if not avoided will result in death or serious injury The possible hazards are shown in the adjoining symbols or explained in the text A Indicates a hazardous situation which if not avoided could result in death or serious injury The possible haz ards are shown in the adjoining symbols or explained in the text NOTICE Indicates statements not related to personal injury gt Indicates special instructions This group of symbols means Warning Watch Out ELECTRIC SHOCK M2. 11 1 Tip Specifications A Straight Curved And Twin Flame Torch Tips Orifice Gas Pressure Consumption Recom d Diameter psig kPa Each Gas Fuel Gas in mm Oxygen Fuel ft3 hr L hr w Oxygen 2 006 2 2 0 11074 Acetylene 0 15 13 8 13 8 3 1 Hydrogen 3 011 4 4 0 94 0 28 27 6 27 6 26 6 020 1 88 0 5 a 5 aa 5 53 2 Acetylene Hydrogen 029 Propane 0 73 a 4 a 4 a 5 Propylene Natural Gas 6 037 6 6 5 38 City Gas 0 94 41 4 41 4 152 047 7 52 1 19 55 2 55 2 213 Acetylene and oxygen only LF Pressures above apply to all fuel gases B Multi Orifice Heating Tip Specifications Gas Pressure Consumption psig oor ft3 hr L hr BTU re 13662 5 51 ia 58 7050 Acetylene ioe 5 156 129 7 Hydrogen Propylene 13717 10 12 8 5 5000 13717 5 3 6 2 2 2400 Natural 34 5 102 62 3 Gas OM 263 357 Page 20 11 2 Fuel Gas And Flame Characteristics Settings Neutral Flame Acetylene Oxygen After igniting open acety lene valve until soot disap pears from end of flame Add oxygen until the feather shown on the right just dis appears in the bright inner cone Propane Oxygen After igniting add oxygen until bright inner core reach es its shortest point and then stop Repeat process to force as much fuel through the tip as possible Flame Settings 4 Neutral Flame Even Mixture of Fuel and Oxygen I Carburizin
3. This product contains chemicals including lead known to the state of California to cause cancer birth defects or other reproductive harm Wash hands after use OM 263 357 Page 5 1 4 Principal Safety Standards Safety in Welding Cutting and Allied Processes ANSI Standard 249 1 is available as a free download from the American Welding Society at http www aws org or purchased from Global Engineering Documents phone 1 877 413 5184 website www global ihs com Safe Practices for the Preparation of Containers and Piping for Welding and Cutting American Welding Society Standard AWS F4 1 from Global Engineering Documents phone 1 877 413 5184 website www global ins com Safe Practices for Welding and Cutting Containers that have Held Com bustibles American Welding Society Standard AWS A 6 0 from Global Engineering Documents phone 1 877 413 5184 website www global ins com Safe Handling of Compressed Gases in Cylinders CGA Pamphlet P 1 from Compressed Gas Association 14501 George Carter Way Suite 103 Chantilly VA 20151 phone 703 788 2700 website www cganet com Acetylene CGA Pamphlet G 1 from Compressed Gas Association 14501 George Carter Way Suite 103 Chantilly VA 20151 phone 703 788 2700 website www cganet com Safety in Welding Cutting and Allied Processes CSA Standard W117 2 from Canadian Standards Association Standards Sales 5060 Spectrum Way Suite 100 Ontario Canada L4W 5NS
4. stamped on the copper section Size 7 produces the largest flame E7 It is recommended that the size 2 tip not be used for gas other than acetylene or hydrogen 3 Install tip and tighten with a wrench Do not overtighten 8 8 Lighting And Adjusting Torch When Using Acetylene Or Hydrogen Fuel Gas The following instructions are adjustment procedures for the torch when using acetylene or hydrogen fuel gases This equipment is designed to operate at a set volume of gas for each tip Follow the set up instructions explained in Sections 8 2 thru 8 7 before lighting the torch a Using less than the required volume of gas may result in over heating of the tip or equipment and can lead to an internal fire or flashback 44 When lighting torch keep the tip pointed away from people and combustibles C When using hydrogen the flame from the size 2 tip will be difficult to see Lighting and flame adjustment should be made in a dark area or in front of a dark background Use of a cobalt goggle lens may increase flame visibility 1 Adjust the regulator outlet pressure to the torch by turning the regu lator adjusting handle clockwise until the outlet pressure gauge in dicates the recommended pressures for the tip being used see Section 11 1 2 Slightly open the torch fuel gas valve approximately 1 4 turn and ig nite the gas using an approved friction spark lighter or bunsen burn er 4 Do not use matches or a cigarette lighte
5. phone 800 463 6727 website www csa international org Safe Practice For Occupational And Educational Eye And Face Protec tion ANSI Standard Z87 1 from American National Standards Institute 25 West 48rd Street New York NY 10036 phone 212 642 4900 web site www ansi org Standard for Fire Prevention During Welding Cutting and Other Hot Work NFPA Standard 51B from National Fire Protection Association Quincy MA 02269 phone 1 800 344 3555 website www nfpa org OSHA Occupational Safety and Health Standards for General Industry Title 29 Code of Federal Regulations CFR Part 1910 Subpart Q and Part 1926 Subpart J from U S Government Printing Office Superinten dent of Documents P O Box 371954 Pittsburgh PA 15250 7954 phone 1 866 512 1800 there are 10 OSHA Regional Offices phone for Region 5 Chicago is 312 353 2220 website www osha gov Applications Manual for the Revised NIOSH Lifting Equation The Na tional Institute for Occupational Safety and Health NIOSH 1600 Clifton Rd Atlanta GA 30333 phone 1 800 232 4636 website www cdc gov NIOSH Recommended Practices for Safe Oxyfuel Gas Cutting Torch Operation C4 2 C4 2M and Recommended Practices for Safe Oxyfuel Gas Heat ing Torch Operation C4 3 C4 3M from Global Engineering Documents phone 1 877 413 5184 website www global ihs com OM 263 357 Page 6 SECTION 2 INTRODUCTION a Inspect all equipment before use Do not use dam
6. Use only the hoses that are supplied by Smith Equipment These hoses transport low pressure gases from the regulator to the torch tips The hoses are color coded green for oxygen and red for fuel gas 2 Attach the green hose to the oxygen regulator right hand threads and tighten firmly with a wrench 3 Attach the red hose to the fuel gas regulator left hand threads and tighten firmly with a wrench _ LF If the hoses are not color coded attach the hose connection with machined grooves on the nut to the fuel gas regulator left hand threads Attach the hose connection with no grooves on the nut to the oxygen regulator right hand threads Tighten both connections firmly with a wrench 4 Close both the oxygen and fuel gas valves on torch body OM 263 357 Page 11 7 4 Activating The System Open the regulator valves completely by turning knobs clockwise Notice the arrows on top of the knobs 7 5 Purging The System a Always purge gas from the system before lighting torch to pre vent a possible mixed gas explosion Purge gas in a well venti lated area and away from flame or sparks 1 With the tip removed from the torch open the torch oxygen valve for 3 4 seconds to purge line 2 Close the torch oxygen valve 3 Repeat steps 1 and 2 for the fuel gas 7 6 Testing The Equipment For Leaks usean approved oil free leak detection fluid to locate possible leaks Do not stand in front of or beh
7. and degreasers Work in a confined space only if it is well ventilated or while wearing an air supplied respirator Always have a trained watch person nearby Welding and cutting fumes and gases can dis place air and lower the oxygen level causing injury or death Be sure the breathing air is safe Test atmospheres in confined areas for explosive and toxic gases before using oxy fuel equipment Do not weld or cut in locations near degreasing cleaning or spraying operations The heat from welding or cutting flame can react with vapors to form highly toxic and irritating gases Do not weld or cut on coated metals such as galvanized lead or cadmium plated steel unless the coating is removed from the af fected area the area is well ventilated and while wearing an air supplied respirator The coatings and any metals containing these elements can give off toxic fumes if welded or cut Do not weld or cut on sealed air conditioning or refrigeration sys tems unless all refrigerants have been removed from the system BUILDUP OF GAS can injure or kill Shut off compressed gas supply when not in use e Always ventilate confined spaces or use approved air supplied respirator OM 263 357 Page 2 LIGHT RAYS can burn eyes and skin Light rays from the welding and cutting process produce intense visible and invisible ultraviolet and infrared rays that can burn eyes and skin Sparks fly off from the weld e Wear approved face p
8. excessive heat above 125 F 51 5 C or open flame Do not refer to oxygen as air and do not use oxygen as a substitute for compressed air Do not use oxygen to clean clothes or work area for ventilation or to oper ate pneumatic tools Open oxygen cylinder valves slowly Be sure regulator adjusting handle is in the full out off position before opening oxygen cylinder valve Inspect all equipment before use Do not use damaged defective or improperly adjusted welding and cutting equipment Make sure levers and valves work properly threads on equipment are clean no grease or oil and not deformed gauges are intact and easy to read regulator is clean and free of oil or dirt and fittings are prop erly sized for the cylinder Make sure hoses are clean no grease or oil and ferrules are properly installed so the fitting does not slip in side the hose Be sure all connections are tight It is recommended that a reverse flow check valve or a flashback ar restor be installed between the torch handle and the regulator Check valves do not prevent the propagation of a flame upstream flash back but are designed to prevent the unintentional backflow of gases into the cutting attachment torch hoses or regulator which could cause an explosion or fire A flashback arrestor can be installed on the torch handle instead of a check valve Miller flashback arrestors have a reverse flow check valve and prevent the propagation of a flame up st
9. use with the torch Most operators use either acetylene or propane However both gases of fer specific advantages and disadvantages Acetylene produces a very OM 263 357 Page 9 concentrated pinpoint high temperature flame about 6000 F 3316 C whereas the other gases tend to spread the heat produced throughout the outer flame The acetylene flame produces soot during combustion and the LP gases tend to burn much cleaner Acetylene gas is lighter than air and in the event of a gas leak it will tend to dissipate in the atmos phere with any air flow LP gas is heavier than air and will collect in low spots thereby creating potential breathing and combustion hazards What are the flame sizes and orifice diameters of the tips Recommended Overall Orifice Pressures Flame Drill Both Gases Orifice Diameter What are the applications for twin flame tips The flexible twin flame tips may be used where both sides of an object can be heated They can speed up the soldering or brazing process and provide even heating for complete more even solder flows The size 3 twin tip is often used by jewelers for sizing rings Tip tubes are flexible and may be bent to position the flames as desired What are the applications for the multi flame rosebud tips They may be used where a larger more widely dispersed flame is need ed for brazing soldering or heating They are used predominantly in the jewelry industry for annealing reticulat
10. ING EQUIP MENT In the event of a warranty claim covered by this warranty the exclusive remedies shall be at Miller s option 1 repair or 2 replacement or where OM 263 357 Page 23 authorized in writing by Miller in appropriate cases 3 the reasonable cost of repair or replacement at an authorized Miller service station or 4 payment of or credit for the purchase price less reasonable depreciation based upon ac tual use upon return of the goods at customer s risk and expense Miller s option of repair or replacement will be F O B Factory at Appleton Wisconsin or F 0 B at a Miller authorized service facility as determined by Miller There fore no compensation or reimbursement for transportation costs of any kind will be allowed TO THE EXTENT PERMITTED BY LAW THE REMEDIES PROVIDED HEREIN ARE THE SOLE AND EXCLUSIVE REMEDIES IN NO EVENT SHALL MILLER BE LIABLE FOR DIRECT INDIRECT SPECIAL IN CIDENTAL OR CONSEQUENTIAL DAMAGES INCLUDING LOSS OF PROFIT WHETHER BASED ON CONTRACT TORT OR ANY OTHER LE GAL THEORY ANY EXPRESS WARRANTY NOT PROVIDED HEREIN AND ANY IMPLIED WARRANTY GUARANTY OR REPRESENTATION AS TO PERFORMANCE AND ANY REMEDY FOR BREACH OF CONTRACT TORT OR ANY OTHER LEGAL THEORY WHICH BUT FOR THIS PROVI SION MIGHT ARISE BY IMPLICATION OPERATION OF LAW CUSTOM OF TRADE OR COURSE OF DEALING INCLUDING ANY IMPLIED WAR RANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PUR POSE WITH RESPECT TO ANY AND AL
11. L EQUIPMENT FURNISHED BY MILLER IS EXCLUDED AND DISCLAIMED BY MILLER Some states in the U S A do not allow limitations of how long an implied war ranty lasts or the exclusion of incidental indirect special or consequential damages so the above limitation or exclusion may not apply to you This war ranty provides specific legal rights and other rights may be available but may vary from state to state In Canada legislation in some provinces provides for certain additional warranties or remedies other than as stated herein and to the extent that they may not be waived the limitations and exclusions set out above may not apply This Limited Warranty provides specific legal rights and other rights may be available but may vary from province to province Mil oxy fuel warr 2013 05 OM 263 357 Page 24 Notes OM 263 357 Page 25 Miller SMITH Miller Electric Mfg Co An Illinois Tool Works Company 1635 West Spencer Street Appleton WI 54914 USA International Headquarters USA USA Phone 920 735 4505 Auto Attended USA amp Canada FAX 920 735 4134 International FAX 920 735 4125 For International Locations Visit www MillerWelds com ORIGINAL INSTRUCTIONS PRINTED IN USA 2013 Miller Electric Mfg Co 2013 01
12. OM 263 357A _ 2013 06 Processes La Oxy Fuel Soldering Welding Heating The Little Torch OWNERS MANUAL File Accessory Jove Form 4164 Rev 2013 06 TABLE OF CONTENTS SECTION 1 SAFETY PRECAUTIONS READ BEFORE USING 1 t l Symbol Usage a sree ayer cast 9 tt aca coh dhe ea ging hal Dats aah estat ana ra 1 1 2 Oxy Fuel Welding Cutting Brazing Heating Hazards 1 1 3 California Proposition 65 Warnings seca isc esas ara Diesen create ute ats wie tie iet eG 5 1 4 Principal Safety olandaldSs 4 ccevarctegeiecetegeiaos seus i eotieuss a6 6 SECTION 2 INTRODUCTION 2 2 c cece eee eee eee 7 SECTION 3 HAZARDOUS EVENTS 0 0c eee eee eee eee 7 SECTION 4 HAZARDS OF RECOMPRESSING PURE OXYGEN 7 SECTION 5 THE TORCH SYSTEM 00 0c cece eee eee eee eee 8 5 1 Torch ener ter ene etn es oe a ee eaten eee ne ee ee 8 5 2 2 21 ge a gn om ae oa eS Sm Se ee ee Dems ee 8 Ce NS hac crea ct tac chee AAE A AEA A A E aha al E dah Mash Mead De 8 5 4 Repairs Replacement Of Hose 0 cece cece eee eee eee 8 SECTION 6 FREQUENTLY ASKED QUESTIONS 0000eeeeee 9 SECTION 7 USING TORCH WITH DISPOSABLE TYPE CYLINDERS 10 7 1 Disposable Compressed Gas Cylinders 0 cece eee 11 7 2 Installing Regulators On Cylinders Models 239 499B And 239 500B 11 7 3 Installing Hoses s2i22205 pissed eeeer sited het cee oe ee age 11 7 4 Ac
13. OVING PARTS and HOT PARTS hazards Consult symbols and related instructions below for necessary actions to avoid the hazards 1 2 A rer e gt Welding Cutting Brazing Heating Hazards The symbols shown below are used throughout this manual to call attention to and identify possible hazards When you see the symbol watch out and follow the related instructions to avoid the hazard The safety information given below is only a summary of the more complete safety information found in the Safety Standards listed in Section 1 4 Read and follow all Safety Standards Only qualified persons should install operate maintain and repair this equipment During operation keep everybody especially children away Do not use this equipment unless you are trained in its proper use or are under competent supervision Follow the proced ures described in this booklet every time you use the equip ment Failure to follow these instructions may cause fire ex plosion asphyxiation property damage or personal injury This equipment must be used in accordance with all Federal State and local regulations as well as DOT Department of Transportation and CGA Compressed Gas Association reg ulations Contact your gas supplier for more information on the proper use of compressed gases In this document the phrase welding and cutting also refers to oth er oxy fuel operations like brazing and heating OM 263 357 Page 1
14. READ INSTRUCTIONS e Read and follow all labels and the Owner s Manual carefully be fore installing operating or servicing equipment Read the safety information at the beginning of the manual and in each section e Use only genuine replacement parts from the manufacturer e Perform maintenance and service according to the Owner s Manuals industry standards and national state and local codes HOT PARTS can burn n e Do not touch hot parts bare handed e Allow cooling period before working on equipment e To handle hot parts use proper tools and or wear heavy insu lated welding gloves and clothing to prevent burns FUMES AND GASES can be hazardous Welding and cutting produces fumes and gases Breathing these fumes and gases can be hazardous to your health Keep your head out of the fumes Do not breathe the fumes f inside ventilate the area and or use local forced ventilation at the flame to remove welding and cutting fumes and gases Some gases natural gas and acetylene are lighter than air and will col lect in high areas Other gases propane and butane are heavier than air and will collect in low areas Heavier than air gases are more difficult to diffuse and are more likely to accumulate If ventilation is poor wear an approved air Supplied respirator Read and understand the Material Safety Data Sheets MSDSs and the manufacturer s instructions for metals consumables coatings cleaners
15. WITH HIGH PRESSURE INDUSTRIAL TYPE CYLINDERS 4 install cylinders in an upright position by securing to a station ary support or cylinder rack to prevent falling or tipping Main tain a clear path from the cylinders to the work area a Inspect equipment before use Do not use if grease or oil is present on equipment or if equipment is damaged Have equip ment cleaned repaired by a qualified person 4 Do not slightly open or crack acetylene cylinder valve to blow debris from the valve outlet Remove the debris using ni trogen air or a clean oil free rag Use only compressed gas cylinders that are approved by the Depart ment of Transportation DOT with this equipment The torch will operate on cylinders that are available from Smith Equipment or from your local welding supply dealer 8 1 Industrial Type Cylinder Information e Industrial oxygen cylinders are pressurized to approximately 2 250 psig 15 513 kPa OM 263 357 Page 13 8 2 Industrial hydrogen cylinders are pressurized to approximately 2 250 psig 15 513 kPa Industrial acetylene cylinders are pressurized to approximately 250 psig 1724 kPa Installing Regulators Oxygen regulator is identified by green color and has right hand threads for cylinder connection Fuel gas regulator is identified by red color and has left hand threads for cylinder connection 1 C Always tighten regulator _ Attach the oxygen regulator to the oxygen c
16. ace the torch hose Step by step instructions a ferrule brass hose retainer band and fer ule replacement tool accompany all replacement hose assemblies What are the part numbers for replacement hose assemblies Oxygen 13254 1 8 Fuel Gas 13254 3 8 Hose Pair 13254 4 8 Why is it hard to light size 1 and size 2 tips or keep them lit This condition is typically due to excessive gas pressures A maximum of just 2 psig 13 7 kPa outlet pressure is recommended for both gases and the use of an open flame makes lighting the tiny flames much easier Does the torch require adaptors to fit cylinder regulators For most regulators the answer is no The hose assemblies have stan dard size B 9 16 in welding hose type connections and will attach to most industrial welding gas regulators Can the orifices in the torch tips be cleaned If the orifices are obstructed by flux the tips can often be cleaned by boil ing them in water for about 10 minutes Other methods used to clean dirty tips involve the use of a jeweler s type steam cleaner or an ultrasonic cleaner What fuel gases will work with the torch The torch may be operated with most commercially used welding gases including acetylene propane hydrogen propylene and butane It may also be used with city gas natural gas at a minimum pressure of 1 psig 6 9 kPa at the torch NOTICE Most city gas lines only produce 1 4 1 2 psig 1 7 3 4 kPa What fuel gas should I
17. aged defect ive or improperly adjusted welding and cutting equipment Make sure levers and valves work properly threads on equip ment are clean no grease or oil and not deformed gauges are intact and easy to read regulator is clean and free of oil or dirt and fittings are properly sized for the cylinder Make sure hoses are clean no grease or oil and ferrules are properly in stalled so the fitting does not slip inside the hose Be sure all connections are tight and there are no leaks in the system This booklet offers basic information regarding the Little Torch Given reasonable care the torch will provide trouble free use for many years SECTION 3 HAZARDOUS EVENTS The following events are very hazardous and can occur in any oxy fuel system It is important to understand these hazards and know how to prevent them Backfire The return of the flame into the torch usually accompanied by a popping sound The flame may be extinguished or it may re appear at the tip end Sustained Backfire The return of the flame into the torch that contin ues to burn inside the torch with a hissing or squealing sound Flashback The return of a flame into and through the torch or into the hose In some instances it can reach the regulator and even enter the cylin der This is generally caused by the mixing of the oxygen and fuel gas in the system This is a very dangerous situation that can cause an explosion any where in the system This i
18. er to ignite the gas Adjust until the flame is about to leave the end of tip Slowly open the torch oxygen valve until a neutral flame is obtained Further open the torch fuel valve 1 8 1 4 turn Again open the torch oxygen valve until the flame is neutral If needed continue this procedure until the maximum volume of fuel and oxygen are being used and desired flame is achieved 8 10 Extinguishing The Torch Flame And Securing Equipment a ee a De 1 Turn the torch fuel gas valve to the closed position clockwise 2 Turn the torch oxygen valve to the closed position clockwise 8 11 Shutting Down The System 1 Extinguish torch flame see Section 8 10 2 Turn the oxygen cylinder valve to the closed position clockwise 3 Turn the fuel gas cylinder valve to the closed position clockwise 8 12 Bleeding The System Of Gases 1 Remove tip from torch body 2 Open torch oxygen valve 1 2 turn 3 Observe oxygen regulator When low pressure gauge indicates ze ro 0 close the torch oxygen valve 4 Turn the oxygen regulator pressure adjusting handle to the left counterclockwise until no spring pressure is felt on the adjusting handle 5 Repeat steps 2 3 and 4 for the fuel gas 6 Secure equipment and store in safe area OM 263 357 Page 17 SECTION 9 HOSE REPLACEMENT is Replace hoses at the first sign of any defects flaws or dam age The hoses should otherwise be replaced every four years Inspect
19. ers When the flame indicates a loss of pressure immediately shut down the system and replace the cylinder A Never tamper with or attempt to repair disposable cylinders If damaged return cylinder to the supplier Always check the regulator cylinder connection for leaks 7 2 Installing Regulators On Cylinders Models 239 499B And 239 500B 1 Before attaching the regulators to the disposable cylinders be sure the regulator and torch valves are in the Off position 2 Attach the oxygen regulator identified by the word Oxygen stamped on side of regulator to the oxygen cylinder The dispos able oxygen cylinder and the oxygen regulator both have left hand threads Turn regulator by hand counterclockwise and tighten se Curely 3 Attach the fuel gas regulator to the disposable fuel gas cylinder The regulator and the cylinder both have right hand threads Turn regu lator by hand clockwise and tighten securely 4 Check the regulator cylinder connection for leaks 7 3 Installing Hoses amp Replace hoses at the first sign of any defects flaws or dam age The hoses should otherwise be replaced every four years Inspect hoses for damage or leaks before each operation Do not allow hoses to come in contact with hot metal molten sol der or corrosive chemicals Do not expose hoses to fluxing agents as these agents will deteriorate the hose materials and cause them to leak Donot splice or use damaged oxy fuel hoses
20. g Reducing Flame Excess Fuel Gas e Lower Temperature e Less Oxidizing lt 4 Oxidizing Flame Seldom Used Excess Oxygen e Short Outer Flame e Narrow Inner Cone e Noisy e Hottest 11 3 Flame And Heat Placement BTU Output Per Cubic Ft Of Fuel Burned With Oxygen Total BTU Fuel Gas Output Acetylene re Propane f 250 2250 Natural Gas City Gas l 11 Hydrogen r 55 ft8 Gas hr L Gas hr Flame Temperatures In F C Compressed Atmospheric Given Air Tips Air Tips yg 4800 1500 2649 816 3500 1500 1927 816 Oxygen To Fuel Ratio 11 4 Cylinder Valve Identification For Regulator Selection L Compressed Gas Association connection numbers are also shown 510 Internal Threads Internal 510 PROPANE INDUSTRIAL FROM 60 400 Cu Ft ACETYLENE 40 Cu Ft OXYGEN OM 263 357 Page 21 SECTION 12 ACCESSORIES Straight Tip Size 4 Twin Flame Tip Sizes 4 6 Propane Natural Gas Melting Tip Melts To 3 oz Silver Stock No 13717 Acetylene Hydrogen Melting Tip Melts to 3 oz Gold Or Silver Stock No 13 662 Curved Tips Sizes 2 7 Magnetic Stand Stock No 14014 Torch And Tips Sold Separately Size 2 3 Tips Have Jeweled Orifice 161 012 161 014 OM 263 357 Page 22 Effective July 1 2013 For Oxy Fuel and Pressure Regulation Equipment with a date code of BDG or newer This limited warranty supersedes all previous Miller wa
21. g an approved friction spark lighter 4 Do not use matches or a cigarette lighter to ignite the gas 2 Slowly open the torch oxygen valve counterclockwise until the flame is neutralized This is accomplished by adding oxygen until the bright cone off the end of the tip just reaches its shortest length 3 Increase the fuel gas flow by opening torch valve another 1 8 turn 4 Increase the oxygen until the flame is neutralized If necessary continue this procedure until the maximum volume of fuel and oxy gen are being used and the desired flame is achieved 7 9 Extinguishing The Torch Flame 1 Turn the fuel gas torch valve to the closed position clockwise 2 Turn the torch oxygen valve to the closed position clockwise 7 10 Shutting Down The System 1 Extinguish torch flame see Section 7 9 2 Turn the oxygen regulator valve knob to the closed position coun terclockwise Notice arrow on knob 3 Turn the fuel gas regulator valve knob to the closed position coun terclockwise Notice arrow on knob 7 11 Bleeding The System 1 Remove the tip from the torch 2 Open the torch oxygen valve 1 2 turn until all pressure has been re leased from the hose and regulator then close the torch oxygen valve 3 Open the torch fuel gas valve 1 2 turn until all pressure has been released from the hose and regulator then close the torch fuel gas valve 4 Secure equipment and store in safe area SECTION 8 USING THE TORCH
22. ge gas from the system before lighting torch to pre vent a possible mixed gas explosion Purge gas in a well venti lated area and away from flame or sparks With no tip installed open the torch body oxygen valve and allow oxygen to flow for three to four seconds This will purge the oxygen side of the system Repeat steps 2 and 3 for the fuel gas This will purge the fuel gas side of the system Testing The Equipment For Leaks Use an approved oil free leak detection fluid to locate possible leaks Do not stand in front of or behind the regulator when opening the cylinder valve Never open a cylinder valve suddenly as this can damage a regulator or cause an oxygen regulator fire With the system pressurized and the torch body valves closed check every connection and joint from the cylinder valve to the torch tip with an approved leak detection solution Figure 3 If leaks are detected elimi nate them before proceeding If leaks cannot be eliminated do not put the equipment into service until it has been repaired or replaced EF If the torch is not going to be in use for more than one half hour it is recommended that the system be completely shut down see Section 8 11 OM 263 357 Page 15 161 013 Figure 3 Testing Equipment For Leaks 8 7 Selecting And Installing A Tip 1 Fully open the oxygen and fuel gas regulators turn handles clock wise 2 Select the desired tip Tip sizes are represented by a number 2 7
23. gn of any defects flaws or dam age The hoses should otherwise be replaced every four years Inspect hoses for damage or leaks before each operation Do not allow hoses to come in contact with hot metal molten sol der or corrosive chemicals Do not expose hoses to fluxing agents as these agents will deteriorate the hose materials and cause them to leak Usean approved oil free leak detection fluid to locate possible leaks OM 263 357 Page 8 Use only industrial grade hose Grade T hose is acceptable for all fuel gases Grade R hose is for acetylene only The torch hose is of a special material designed to be compatible with the various fuel gases The maximum length of hose used should not exceed 12 ft 3 7 m The hose may be attached to standard welding gas hoses 3 16 in or larger diameter with special brass fittings if the gas cylinders must be located a further distance from the torch The brass B type fit tings for connecting the hoses can be purchased from most welding equipment dealers For your protection use only genuine Smith Equipment hose and re placement parts Smith Equipment replacement hoses come with step by step replacement instructions and a tool for securing the brass ferrules over the hose ends Repairs and replacement parts are available through your authorized Smith Equipment distributor Find a dealer at www smithequipment com SECTION 6 FREQUENTLY ASKED QUESTIONS a a ES STS How do I repl
24. hes or a lighter Always use a striker e Do not use acetylene above 15 psi 103 kPa flowing It is accept able to use acetylene regulators that indicate a static pressure up to 22 psi 151 kPa Check oxy fuel system for leaks with an approved leak detection solution or leak detector Never test for gas leaks with a flame Remove all flammables within 35 ft 10 7 m of the welding or cut ting operation If this is not possible tightly cover them with ap proved covers Do not weld or cut where flying sparks can strike flammable material Protect yourself and others from flying sparks and hot metal Be alert that welding and cutting sparks and hot materials from welding and cutting can easily go through small cracks and open ings to adjacent areas Watch for fire and keep a fire extinguisher nearby Be aware that welding or cutting on a ceiling floor bulkhead or partition can cause fire on the hidden side Do not weld or cut on containers that have held combustibles or on closed containers such as tanks drums or pipes unless they are properly prepared according to AWS F4 1 and AWS A6 0 see Safety Standards Do not weld or cut where the atmosphere may contain flammable dust gas or liquid vapors such as gasoline Wear oil free protective garments such as leather gloves heavy shirt cuffless trousers high shoes and a cap e Do not use fuel gases to clean clothes or work area Remove any combustib
25. hoses for damage or leaks before each operation Do not allow hoses to come in contact with hot metal molten sol der or corrosive chemicals Do not expose hoses to fluxing agents as these agents will deteriorate the hose materials and cause them to leak Use only industrial grade hose Grade T hose is acceptable for all fuel gases Grade R hose is for acetylene only ES The following instructions apply only to the torch bodies in torch mod els 11 1101C 11 1102C 11 1103C and 11 1104C Check in structions per your specific torch body number as stamped on the black handle tube 9 1 Removing Old Hose 1 Lock ferrule tool in vise Insert tool between torch body and ferrule See Figure 4 2 Grasp torch firmly and pull forward The ferrule will slide back on the hose Repeat operation on second hose Slide ferrule away from torch 3 Remove hose from torch body 9 2 Installing New Hose 1 Check that regulator right hand thread nut is on green blue hose and left hand thread grooved nut is on red hose Place new ferrule on each hose and slide ferrule down each hose 1 2 in 25 51 mm 2 Slide the green hose over the barbed nipple Slip hose into ferrule tool below ferrule and slide tool against end of ferrule CHAMFER rA FERRULE TOOL a FA Part No 7799 3 16 in 5 mm VISE 161 010 Figure 4 Hose Replacement 3 Push metal ferrule onto barbed nipple Slip hose into ferrule tool be low ferrule and
26. ind the regulator when opening the cylinder valve Never open a cylinder valve suddenly as this can damage a regulator or cause an oxygen regulator fire With the system pressurized and the torch body valves closed check every connection and joint from the cylinder valve to the torch tip with an approved leak detection solution Figure 1 If leaks are detected elimi nate them before proceeding If leaks cannot be eliminated do not put the equipment into service until it has been repaired or replaced E7 If the torch is not going to be in use for more than one half hour turn the regulator valves to the Off position 161 013 Figure 1 Testing Equipment For Leaks 7 7 Selecting And Installing A Tip 1 Fully open the oxygen and fuel gas regulators turn handles clock wise 2 Select the desired tip Tip sizes are represented by a number 2 7 stamped on the copper section Size 7 produces the largest flame E7 It is recommended that the size 2 tip not be used for gas other than acetylene or hydrogen 3 Install tip and tighten with a wrench Do not overtighten 7 8 Lighting Procedures When Using Disposable Cylinders Follow the set up instructions explained in Sections 7 2 thru 7 7 before lighting the torch 44 When lighting torch keep the tip pointed away from people and combustibles OM 263 357 Page 12 1 Open the torch fuel gas valve approximately 1 8 1 4 turn counter clockwise and Ignite the fuel gas usin
27. ion The use of tips other than genuine Miller tips may void the lifetime war ranty 2 3 Years Parts and Labor Toughcut Outfits Series 30 32 35 36 40 46 Regulators and all Flowmeters Flow Gauges and Flowmeter Regulators 3 2 Years Parts and Labor i Series 250 820 and Smith Branded Specialty Gas Regulators 4 1 Year Parts and Labor Gas Axe Cutting Torches HVAC Purge Regulators 3 Stage Ni trogen Low Pressure Blanketing Regulators Gas Savers Gas Mixers and all other Oxy Fuel Products SMITH BRANDED PRODUCTS The Little Torch Quickbraze Torch Handi Heet Silver Smith Torch 5 90 Days Parts and Labor j Corrosive Service Regulators Miller s True Blue Limited Warranty shall not apply to 1 Consumable components oxy fuel cutting welding and heating tips or parts that fail due to normal wear 2 Items furnished by Miller but manufactured by others These items are covered by the manufacturer s warranty if any 3 Equipment that has been modified by any party other than Miller or equipment that has been improperly installed improperly operated or misused based upon industry standards or equipment which has not had reasonable and necessary maintenance or equipment which has been used for operation outside of the specifications for the equipment MILLER PRODUCTS ARE INTENDED FOR PURCHASE AND USE BY COMMERCIAL INDUSTRIAL USERS AND PERSONS TRAINED AND EX PERIENCED IN THE USE AND MAINTENANCE OF WELD
28. ion and casting of gold and silver Both acetylene and the propane models are capable of casting up to 3 oz 85 g of gold or silver These tips are also used for enameling and plas tics polishing Can the torch gas valves be replaced if they are damaged or worn out Yes the complete valve assembly may be replaced for either gas Using an open end wrench remove the valve assembly from the torch body The white PTFE packing rings under the valves should also be replaced part no 7348 Valve assembly part numbers are as follows oxygen green No 7345 fuel red No 7346 SECTION 7 USING THE TORCH WITH DISPOSABLE TYPE CYLINDERS a Inspect equipment before use Do not use if grease or oil is present on equipment or if equipment is damaged Have equip ment cleaned repaired by a qualified person OM 263 357 Page 10 amp Do not slightly open or crack acetylene cylinder valve to blow debris from the valve outlet Remove the debris using ni trogen air or a clean oil free rag 7 1 Disposable Compressed Gas Cylinders Use only compressed gas cylinders that are approved by the Depart ment of Transportation DOT with this equipment The torch will operate on the throw away disposable cylinders that are found in most hardware retail or welding outlets a Dispose of used disposable cylinders according to the manu facturer s recommendations Do not throw cylinders in fire 44 Do not completely empty disposable cylind
29. les such as a butane lighter or matches from your person before doing any welding or cutting e After completion of work inspect area to ensure it is free of sparks glowing embers and flames Follow requirements in OSHA 1910 252 a 2 iv and NFPA 51B for hot work and have a fire watcher and extinguisher nearby OM 263 357 Page 4 CYLINDERS can explode if damaged Compressed gas cylinders contain gas under high pressure If damaged a cylinder can explode Since gas cylinders are normally part of the welding or cutting process be sure to treat them carefully Protect compressed gas cylinders from excessive heat mechani cal shocks physical damage slag open flames and sparks Install cylinders in an upright position by securing to a stationary support or cylinder rack to prevent falling or tipping Do not lay acet ylene cylinders on their sides or acetone will flow out of the cylinder and damage the equipment Keep cylinders away from any arc welding cutting or other electri cal circuits Never drape a welding or cutting torch over a gas cylinder Never weld or cut on a pressurized cylinder explosion will result e Use only correct compressed gas cylinders regulators hoses and fittings designed for the specific application maintain them and as sociated parts in good condition Do not use compressed gas cylin der unless an approved gas regulator is attached to the gas valve Turn face away f
30. r to ignite the gas Continue opening the fuel gas valve until the flame is about to leave the end of the tip or the soot being discharged disappears 4 Slowly open the torch oxygen valve Continue to open torch valve until the flame is in its neutral condition or the desired flame is achieved o OM 263 357 Page 16 8 9 Lighting And Adjusting Torch When Using Alternate Fuel Gases Propane Propylene Natural Gas The following instructions are adjustment procedures for the torch when using alternate fuel gases This equipment is designed to operate at a set volume of gas for each tip Follow the set up instructions explained in Sections 8 2 thru 8 7 before lighting the torch a Using less than the required volume of gas may result in over heating of the tip or equipment and can lead to an internal fire or flashback 44 When lighting torch keep the tip pointed away from people and combustibles E7 Do not use the size 2 tip for alternate fuel gases The size 3 tip may be difficult to light when using natural gas as the fuel 1 Adjust the regulator outlet pressure to the torch by turning the regu lator adjusting handle clockwise until the outlet pressure gauge in dicates the recommended pressures for the tip being used see Section 11 1 2 Slightly open the torch fuel gas valve approximately 1 4 turn and ig nite the gas using an approved friction spark lighter or bunsen burner Do not use matches or a cigarette light
31. ream If a flashback arrestor is installed a check valve is not neces sary Using a flashback arrestor and a check valve may reduce gas flow and affect torch operation To help prevent the reverse flow of gases be sure the cylinders contain enough gas to complete the work OM 263 357 Page 3 Perform work only in an area with a fireproof floor concrete Do not heat concrete because it may expand and explode violently Perform work on a fireproof surface Use heat resistant shields to protect nearby walls and flooring Do not use if grease or oil is present on equipment or if equipment is damaged Have equipment cleaned repaired by a qualified per son Do not open a cylinder valve quickly or the regulator may be dam aged and cause a fire Do not open acetylene cylinder valve more than 3 4 turn For all gases except acetylene open cylinder valve fully to backseal the cylinder valve Keep cylinder wrench on the cylinder for quick shut off e Do not slightly open or crack acetylene cylinder valve to blow debris from the valve outlet Remove the debris using nitrogen air or a clean oil free rag e Always purge gas from the system before lighting torch Purge gas in a well ventilated area and away from flame or sparks Keep torch flame or sparks away from cylinder regulator and gas hose e Use only the gases recommended by the manufacturer of the oxy fuel equipment being used Never light a torch with matc
32. rom valve outlet when opening cylinder valve Do not stand in front of or behind the regulator when opening the valve Keep protective cap in place over valve except when cylinder is in use or connected for use e Use the right equipment correct procedures and sufficient num ber of persons to lift and move cylinders Store compressed gas and oxygen cylinders in separate locations Store empty cylinders with valves closed and caps in place Do not modify or repair cylinders or valves Store leaking acetylene cylinders outdoors in a safe area Identify leaking cylinders and re turn them to the supplier e Dispose of used disposable cylinders according to the manufactur er s recommendations Do not throw cylinders in fire e Follow instructions provided by the gas supplier and on com pressed gas cylinders associated equipment and in Compressed Gas Association CGA publication P 1 listed in Safety Standards wee FLYING METAL or DIRT can injure eyes e Welding cutting chipping wire brushing and grinding cause sparks and flying metal e Wear welding goggles or wear welding helmet welding face shield over approved goggles safety glasses with side shields 1 3 California Proposition 65 Warnings A Welding or cutting equipment produces fumes or gases which contain chemicals known to the State of California to cause birth defects and in some cases cancer California Health amp Safety Code Section 25249 5 et seq
33. rotection fitted with a proper shade of filter lenses to protect your face and eyes from light rays and sparks when welding cutting or watching see ANSI 249 1 and 287 1 listed in Safety Standards Wear welding goggles or wear welding helmet welding face shield over approved goggles safety glasses with side shields e Use protective screens or barriers to protect others from flash glare and sparks warn others not to watch the welding or cutting Wear protective clothing made from durable flame resistant material leather heavy cotton or wool and foot protection A N WELDING AND CUTTING can cause fire or explosion Welding and cutting on closed containers such as tanks drums or pipes can cause them to blow up Sparks can fly off from the welding or cutting operations The flying sparks hot workpiece and hot equipment can cause fires and burns Check and be sure the area is safe before doing any welding or cutting e Do not use this welding and cutting equipment with gases and pressures other than those for which it is intended Oxygen is not flammable however the presence of pure oxygen will drastically increase the speed and force with which burning takes place Oxy gen must never be allowed to contact grease oil or other petro leum based substances therefore be sure there is no oil or grease on the regulator cylinder valves or equipment Do not use petro leum based pipe sealants Do not use or store near
34. rranties and is exclu sive with no other guarantees or warranties expressed or implied LIMITED WARRANTY Subject to the terms and conditions below Miller Electric Mfg Co Appleton Wisconsin warrants to its original retail purchas er that new Miller equipment sold after the effective date of this limited warran ty is free of defects in material and workmanship at the time it is shipped by Miller THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WAR RANTIES EXPRESS OR IMPLIED INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS Within the warranty periods listed be low Miller will repair or replace any warranted parts or components that fail due to such defects in material or workmanship Miller must be notified in writ ing within thirty 30 days of such defect or failure at which time Miller will pro vide instructions on the warranty claim procedures to be followed Miller shall honor warranty claims on warranted equipment listed below in the event of such a failure within the warranty time periods All warranty time periods start on the delivery date of the equipment to the original end user purchaser and not to exceed one year after the equipment is shipped to a North American distributor or eighteen months after the equipment is shipped to an Interna tional distributor 1 Lifetime Warranty Parts and Labor Torch Handles Cutting Attachments Straight Cutting Torches and Machine Torches stamped with a LIFETIME inscript
35. s why purging is so important Section 7 5 or 8 5 SECTION 4 ASSOCIATED HAZARDS OF RECOMPRESSING PURE OXYGEN a Open oxygen cylinder valves slowly Opening an oxygen cylin der valve quickly can cause a fire or explosion Be sure regula tor adjusting handle is in the full out off position before open ing an oxygen cylinder valve Recompressing high pressure oxygen in a low pressure cavity may cre ate heat resulting in combustion For combustion to occur oxygen fuel and kindling temperatures must be present All of these components may be present when oxygen is recompressed by opening the tank valve too quickly Oxygen High purity oxygen accelerates the rate of combustion in creases heat output and lowers the combustible point at which various materials will burn OM 263 357 Page 7 Fuel The fuel for combustion may be the regulator itself if enough heat is produced to reach the kindling temperature of the regulator s compo nents Kindling Temperatures Enough heat may be generated to ignite the regulator components by the friction created when recompressing high pressure oxygen This heat is known as the heat of recompression 4 If an internal fire or flashback occurs indicated by a whistling sound or inverted flame do the following Turn off the torch oxygen valve immediately Turn off the torch fuel valve Turn off the oxygen cylinder valve e Turn off the fuel gas cylinder valve Do not relight the
36. slide tool against end of ferrule 4 Hold torch so that ferrule tool is resting on top of vise Open vice jaws to approximate width of hose Using a plastic hammer wood block or equivalent tap lightly on end of tubing or socket until the metal ferrule just covers the barbs of the nipples Remove tool OM 263 357 Page 18 Repeat instructions for red hose Use an approved oil free leak detection fluid to locate possible leaks 6 Close torch valves and pressurize torch both hoses to 10 12 psig 69 83 kPa Immerse torch in water and check connections and torch for leaks bubbles If a leak is not observed the torch is now ready to use If leaks are detected eliminate them before proceed ing If leaks cannot be eliminated do not put the equipment into ser vice until it has been repaired or replaced it SECTION 10 REGULATORS The following regulators are recommended for use with the torch be cause they provide the low regulated pressures and flows necessary for fine flame adjustment and stability Gas Inlet Connection Fits Cylinders 30 20 540 Oxygen CGA 540 All Industrial Oxygen 30 15 520 Acetylene CGA 520 Type B And Autolite 30 15 300 Acetylene CGA 300 Commercial Acetylene 30 15 510 Acetylene CGA 510 Commercial Acetylene 30 15 200 Acetylene CGA 200 MC 10 Cubic Ft 30 100 350 Hydrogen CGA 350 Hydrogen Propane or propylene based fuels OM 263 357 Page 19 SECTION 11 TECHNICAL DATA
37. tivating The System 20 00000n sealer ead retina inane anand 12 Ds Purging The System gsc ac eeer cee ee SEAR SSAC E RAEE 12 7 6 Testing The Equipment For Leaks 0 eee ee eee eee 12 7 7 Selecting And Installing A Tip 2 220 scceecscee in cedadeneneeednens 12 7 8 Lighting Procedures When Using Disposable Cylinders 12 7 9 Extinguishing The Torch Flame 00 c cee eee eee ee 13 7 10 Shutting Down The System 0 e eee eee 13 7 11 Bleeding The System 0 cece eens 13 SECTION 8 USING TORCH WITH HIGH PRESSURE CYLINDERS 13 8 1 Industrial Type Cylinder Information 00 0e eee eens 13 8 2 Installing Regulators 0 0 2 cee eee 14 8 3 NSIAIING HOSES saaara saaara ove N E NE sanear E EE 14 8 4 Activating The Regulators 2 02 eee eee 14 8 5 Adjusting Regulator Pressures And Purging The Hoses 15 8 6 Testing The Equipment For Leaks 0 c cece eee 15 8 7 Selecting And Installing A Tip 0 cece eee 16 8 8 Lighting Adjusting Torch When Using Acetylene Or Hydrogen Fuel 16 8 9 Lighting And Adjusting Torch When Using Alternate Fuel Gases 17 8 10 Extinguishing The Torch Flame And Securing Equipment 17 8 11 Shutting Down The System aaseeura aneen nnne 17 8 12 Bleeding The System Of Gases 0 0c c cece eee eee 17 SECTION 9 HOSE REPLACEMENT
38. torch until the equipment has cooled to the touch and the flashback cause has been determined and corrected SECTION 5 THE TORCH SYSTEM 5 1 Torch The torch is designed to meet the requirements of industry for a small lightweight torch to fusion weld braze heat and solder materials rang ing from 3 16 in 5 mm metal to ultra fine wires The six tips available provide a wide range of flame sizes and the versatility to perform many different tasks Lightweight construction and highly flexible hose provide pinpoint welding with maximum control 5 2 Gases The torch uses oxygen and these commonly available pressurized fuel gases acetylene hydrogen propane propylene or natural gas The smallest tip size 2 can only be used satisfactorily with acetylene and hydrogen fuel gases NOTICE When using natural gas a minimum of 1 psig 6 9 kPa is re quired at the torch Higher pressures are necessary for use with melting tips 5 3 Tips There are six tips available for the torch Because of their extraordinarily small orifices tip sizes 2 and 3 are fitted with a synthetic sapphire to en sure accurate gas flow There are also two different heating tips avail able one tip is for use with acetylene or hydrogen and another tip is de signed for propane or natural gas Refer to the pressure recommendation chart provided in this booklet for the tips being used 5 4 Repairs Replacement Of Hose a Replace hoses at the first si
39. xygen and fuel gas valves on torch body Activating The Regulators Do not stand in front of or behind the regulator when opening the cylinder valve Never open a cylinder valve suddenly as this can damage a regulator or cause an oxygen regulator fire OM 263 357 Page 14 A Do not activate the system with the regulator pressure adjust ing handle turned in This condition can allow high pressure gas to damage the internal parts of the regulator which can re sult in a fire or explosion Turn the oxygen regulator pressure adjusting handle counterclock wise until no spring pressure is felt on the pressure adjusting han dle Turn the fuel gas regulator pressure adjusting handle counter clockwise until no spring pressure is felt on the pressure adjusting handle With the oxygen cylinder between you and the regulator slowly open the cylinder valve until the maximum cylinder pressure is indi cated on the high pressure regulator gauge Then open the oxy gen cylinder valve all the way Open cylinder valve When using acetylene as the fuel gas open cylinder valve no more than 3 4 turn When using a fuel gas other than acetylene open the cylinder valve completely Adjusting Regulator Pressures And Purging The Hoses Verify the oxygen and fuel gas valves on the torch body are in the closed off position Turn oxygen regulator pressure adjusting handle clockwise until the low pressure gauge indicates 5 psig 34 kPa Always pur
40. ylinder and tighten firm ly with a wrench clockwise right hand threads See Figure 2 connection nuts with a wrench 161 015 Figure 2 Installing Regulator Attach the fuel gas regulator to the fuel gas cylinder and tighten firmly with a wrench counterclockwise left hand threads Fuel gas regulators may have left or right hand threads A regulator connec tion with machined grooves in the nut indicates the regulator has left hand threads If there are no machined grooves in the nut the regulator has right hand threads for use with MC or B acetylene cylinders Installing Hoses Replace hoses at the first sign of any defects flaws or dam age The hoses should otherwise be replaced every four years Inspect hoses for damage or leaks before each operation Do not allow hoses to come in contact with hot metal molten sol der or corrosive chemicals Do not expose hoses to fluxing agents as these agents will deteriorate the hose materials and cause them to leak Do not splice or use damaged oxy fuel hoses Use only the hoses that are supplied by Smith Equipment These hoses transport low pressure gases from the regulator to the torch tips The hoses are color coded green for oxygen and red for fuel gas Attach the green hose to the oxygen regulator right hand thread and tighten firmly with a wrench Attach the red hose to the fuel gas regulator left hand thread and tighten firmly with a wrench Close both the o
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