NationalTorches

By Premier Industries

Blaine, Minnesota

Made in USA

. NOTE.

Not to be used with mixtures of

Acetylene and Oxygen

Operating Procedures and Safety Information

for

National Torches

Models 3A-8, 3B-8, 48, 68, 71, 8R

lgFg(luction

BefoIe lperating any fuel gas and ar or oxygen equipmenl, reed and follow the information in this

instuctlon shest or other qualilled oporatiorvtraining instructions. Torches using any combinelion of luel

gas and air or orygen produc€ a high temperature flame lhal can rosuh in property daruge or severe

personal injury lf nol used propedy Exercise exlreme caution when using this equipm€nt.

Nalional torches listod above are designed for nomaloperation using Natu€l Gas and comprsssed air or

oxygen as the principl€ gases. The unique design of this equipment also allows substitulion of other fuel

gasses such as, propane, butran€, Mapp and other manufacfured fuel gases €xcept acelylene and

hydrogen. Caltion should be observed with orygen as the oxidizer since it achi6v6s a holter iame, which

has greater service potential

Do nol alter or aftempt to repak any fust gas and ak or oxygen equipment. Only authonzed repai.

p€lsonnel should perform repairs.

General Safetv lnformation

. Protect your eyes at all tjmes with approved goggles. Oxygen-fuel hoating and brazing may produce

hazardous €ys (infrared/ultra-violet), so an approved filter lens (at least a number five shade or da*er)

should ba us€d. Do not allow bystanders to look directly at your work wilhout propereye protection.

. Appmpriate protective clothing such as gloves, aprons, safety shoes, etc. are required when using

fuel-air/oxygen equipment Rellected heat, molten melal or sparks can cause severe burns to unprotected

parts of lhe body.

. Fu€lgas and air or orygen heating or brazing operations should be performed whenever possible in

an open, well venlilated area. Combuslion fumss and fumes llom heated flux must b€ adoquately

exhausted ordisperced from the wo|k area.

. The safoty of the workplace must be mainlained:

- The \0ork plac€ must have a freproof floor.

- Workbenches must havs fireoroof toos

- The work site should b€ clear of combustible matorials, especially oil or grcas€.

- Never allow gas-air equipm€nt lo be contaminated with petroleum-based substances. In the

presenc€ ol oxyg€n, lhesg substances can easily ignite and bum violsndy
. Use only @mpressed gas cytinders lhat are approved by the Department of Transportation (DOT),

and follow the instructions and selety proc€dur€s provided by your gas cylind€r supplier, s!ch as:

- Cylinders must be in the vertical position when in use and secured from falling.

- Keep cylinder valve prolection c€ps on and valves closed $'henever cylinders ars not in use.

- Locate cylinders away liom flames or sparks

. Never use compressed gases ftom cylinders withoul an approved gas pressure regulator attached to

lhe o!tlet of lhe cylind€r.

. Use caution to keep flames and h€alod objecls away from the gas hoses.

. Use only a spark/friction lighter to ignite lhe flame at he torch lip. Never use a match or cigarctto

lighter.

. lt is r€commended lhat reverse flow check valves be Installed in the syslem between the rcgulator and

the torch Consull yoLr gas cylinder or regulator suppier ro.,nslallalion and fiaintenance.

Torch Uses (Not to be used with mixlures of acetylene and oxygen)

The National torches hsted at the b€ginning of this brochure are used for lampworking, healing,

olasswork. solderino. lioht brazrno and silver solderino The eoLioment can be used on a varietY ol

;aledals that can wr'dsiand the leiel of heat qenerated 6v d1e Ra.re Use the Tip Selector Charts and the

Flame T€mperature Chart printeo later in thia inslruction sheet to assist in selectng the equipmenl and

gases for the applicalion

This is not a welding torch and is not designed forwelding applic€dons.

lnstallation

National torcies ar6 connect€d lo fLel and air or oxyqen slpp'ies with an industrial welding grade hose.

Industrial welding grade hoses are generally color cooed red for fuel gas. black for air and grsen for

oxyg6n.

Suoolv ends of lhe hoses must hEve DroDerlv crimDed sciew fitlrnas Indexed witrn 9/16-18 l€fl hand

thrilids for fuel gas and 9/'1618 right hahd ihreads foi th€ arr or oxygdn. Connection of the fuel gas hose

to a nalural gas valve oa lin€ should b6 dono by a licensed plLmber lo meet codes. ll cylind€ls are used,

connect hoses to propody s€lecled regulalors and check valves.

Before attachina hoses to the torch, ouro€ hoses indrviouallv lo remove any preservative talc or cut-off

partides by ope-ning valves or regulaldrs for 5 seconds when iel at 5 psi prsssuio with hoses attached.

Torch€s 3B-B and 48. wilh'B'size (9/1G18) threaded hose cornections, and lorch 8R, with'A'sizs {3/8-

24) threaoed hose connections, ar€ also inde)(ed nght hano and lefl hand tor airloxygen and tuel.

.espectively. Simply make the threaded connectons lo an Industrial welding grads hose s€t that is

assembled with crimp€d ferul€s for a leak free hook-up (lndustriai welding g€dg hos€ s€ts are available

fiom Pramior lndustdes )

The 3A-8, 7L and 69 to;ches hav6 hose barbs to connecl the qas supplies. Hoses arc connocled to lhe

torch bv lirst aoolvino th6 fenule. and lhen oushino the hose dnto the ba6€d fittinas until all barbs are

covered. Crimi die lerrule and test by pulling on-he hose lo. firm attachment. Oo not use the torci

without properly crimped ferniles on ths hoses.

lf you do not have the lacilities for applying hoses prop€rly, consult your dealer or cylinder supplier who

will provide proper littjngs and attaci them in mosi cases

B€fore ljghling torch, test all connections wilh a soap waler solution. Never test with or near an opon

lame.

Adiustino Gas Pressures

National Torch tips are d€signed to op€rate $/ith specjlic pressure settings to achi€ve desired

performanc€. Please consult ths Tip Selector Charts that follows for proper tip selscfion and pressure

setlings.

Set the reoulalor Dressures with the lorch valves clos€d. Tum the adiustinq screw of lhe air or oryo€n

regulator clockwis; until the desired paossure is aegistered on the low p'ressuie gaLge. Repeat tor tho fuel

regulalor unless 'uel hose is connectsd to a natural gas pipe or a preset regulator is Lsed.
Liohtinq and Adiustinq the Flame

To light the tlame:

. Open the fuel valv6 slightly.

. lgnile the fuel gas with a friction lighler.

. lncrease the fuelgas llow uniil the iame app6a6 to l€ave or separate frcm the end of the tip.

. Close the gas valis slowly untilthe fame diaws back and m6eti the snd ofth€ tip.

. Open the air or oxygen needle valve very slowly.

. Contint]e to add air or orygen flow until a well-deJined blu€-whito inner cone app6ars.

Extinouishino the Torch and Shuttinq Down the Svstem

When your work is completed and you wish to shut otf the equipment, proceod as follows:

. Close lhe air-oxvoen torch valve.

. Clos6 ths fueloia torch valve.

. Tum ofi bolh cilinderor lin6 valves (clockwise).

. Opsn both torch valvos brioflv to relieve the reaidual oas oressure.

. ShLt olf lorch valves aoain.

. Rotate r€gulator adjusEng screws to h€ left (counterclockwise).

. Always storo the equipment with cylindor or line and torch valves closed.

Shut down complete system whenever torch is unattended or not in use for an extended period.

Soecial Instructions for 7L Lever Torch (Use with Air/Fuel Gas Onlv)

lnslallation of Adapbrnips inlo Torch Head: The 7L Torcn utlizes an adapter {#373) with the National

lips. When installino the adaotea and tios inlo the lorct head. vou must use tlie lollowind orocedure.

1. Thread adaD-ter inlo tib and tiohien hand tioht to bono;n'adaoter into th6 tio.

2. Inserl adapisr with tjfj into loich head andtighten hand tiqlit untii back ehd of tip bottoms on lorch

Torch with tip is now readyfor use.

Ope6tbn: Ope.alon o{ the 7L Torch is similar to othff Na0onal Torches except lhat 1/4 tum ballvalves,

ralher than needle valv€s, are lsed to control iow. Ball valves allow for quiak llow chang6 with small

movements of the valve handl€ so c€ution should be ererc|sed {,hen oporating the valvos

335 Green Valve Wheel

336 Red Valve Wheel

331 Elbow Nut Retaining Ring

330-A Elbow Assembly

329 Elbow Nut

334-VSG Valve Stem Assembly, Green

334-VSR Valve Stem Assembly, Red

R5209 o-Ring

Th€ ball valves are also equrpped with stops allowing for only 90 deqrees of rolation However since

there ar€ no locks in the ciosed posrtron, Ar€ must bs Ekeri not to 6ump the levgrs and accidentally

change lhe valve posilion.

3A-B and 3B-B To.ch Reolacement Parts ?-8

CONSULT FACTORY FOR REPLACEMENT PARTS FOR OTHER PRODUCTS

Premier lndustries

3061 l03rd Lanc NE Suite 200

Blaine, Minnesota 55449

Phone 763-786-4020 . F M 763-786-5424
Tlp S€lector Charts

(Nol all tF nafiJt cturod by Nati,nal a€ listed b.lor; @r!Uh faclory or your dblrblto. io. !Fd.l .gdkalih E€d..)

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Flamo Temporature Cha

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''' -- OrE n Ar Valu€s lcr Oftic Fl. l.,bfdyl

Pmoa.b ,l.0OO 3.5fl) 2.420 Fasl

Netural GeB 1.080 Slow

EOUIPTENT WARRANTY POLICY

Ptqnie. Indulties fPll yarrfiB h ho h'rbl l6er ol ooduds nrdutadued aid sold bv Pl het ddi D.odud .re tle fron

&bds in msbri.l end rorine|lsho. und€r nomal ljsa and service tr a oeri$ ol nin6t! dlys lrD|r t$ data ol irEtallation or

on€ y6fi lrom he dab of thirianl fr!.n [l€ f&lorv, f,fiicJ|€lor ones fosl] Wrhh b6 wCnentv erbd. Pl aoE€3 lo |eolace or

le93l !t 0|6 bdory in ttinnadta. any Fodud bund by Pl to ltave been deledive h fl|alDrial dirodq€nship -et no da4ie to tE

uib.. Plrillnol Fa!b. o.w:atra. eid srn d€ by enioneotEr twr bdory petsonnel.

Pl d|all lbl bo li*lo br ccEelEndd o. indied d.meqe3 b f1o ene oarrhifild bv law. Iib sarantv shall bo [le srclusive

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nE renfiiy ihel ml apply b todrd fiat har been alterfr d nrodrfied ercepl by Pl babry perEoo.rel oi Fldrd rhlj| has

ooen canaoeo Dy aco6nt, ablla d m6usa.

Premier lndustrlos

3061 t03d Lens NE Sdle 200 . Blahe. MN 55149 . Phooe 763786-{020 . Far 7698&542a

E-nrail: !il!plgolfuq!e!!!9! ' wcb sit6: www natibndtorch.com

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