Replacing Torch Check Valves With Flashback Arrestors. HobartWelders OXY-FUEL OUTFITS 770502, 770974

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5-4.

Replacing Torch Check Valves With Flashback Arrestors

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NGO’s tools/ ear plugs electrodewrench

Remove the factory-installed check valves from the torch handle and replace them with the supplied flashback arrestors.

Do not use pipe sealants on metal to metal fittings, such as hose and torch connections and CGA cylinder connections.

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Check valves are designed to protect against the reverse flow of gas into the hose and regulator of the other gas when there is sudden loss of pressure on one of the gases.

Flashback Arrestors protect against reverse flow and flashback. Flashback occurs when the flame travels upstream from the torch to the gas source.

1 Torch Handle

2 Check Valves

3 Flashback Arrestors weldshield faceshield

Install fuel flashback arrestor (red) in fuel fitting on torch handle. Install oxygen flashback arrestor (blue) in oxygen fitting on torch handle.

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The oxygen check valve has right-hand threads and the fuel check valve has left-hand threads.

philips head glasses 11/16 in.

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5-5.

Connecting Hoses To Torch Check Valves Or Flashback Arrestors

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T_allen pinextractor (141761)

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Do not use pipe sealants on metal to metal fittings, such as hose and torch connections and CGA cylinsealant_1 tape

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The hex nut on the fuel hose has notches on the corners. The hex nut corners are smooth on the oxygen hose.

1 Torch Handle

2 Fuel Hose (Red) scissors helmet weldshield faceshield

4 Flashback Arrestors/Check Valves cclamp

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Attach fuel hose (red) to fuel inlet fitting on torch check valve or flashback arrestor. The nut on the fuel hose has left-hand threads.

Attach oxygen hose (green) to oxygen inlet pump pliers

Torx restor. The nut on the oxygen hose has right hand threads.

rpmmeter

Use a wrench to tighten connections.

benchvise popriveter

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Liquid soap Paper Clip handream pliers strapwrench needlenose airgun knife hammer steelbrush awl nutdriver oilcan filtersocket chippinghammer file paintbrush

Ground Strap hacksaw

Thermal Compound

Trowel belttensiongauge

Chisel sealant_1 tape solderiron qtip (swab) stripcrimp vicegrip heavy-duty workclamp light-duty workclamp crimper feelergauge flashlight pinextractor2 torque screwdriver toothbrush torque wrench drill solvent pinextractor ruler tip_dress

T_allen pinextractor (141761)

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SOAP bar soap pump pliers

Liquid soap Paper Clip

Torx strapwrench hammer awl

Needle-Nose Vise Grip file paintbrush

Ground Strap

Thermal Compound

Trowel

Chisel airgun

OM-222 Page 1 qtip (swab) vicegrip crimper feelergauge flashlight ruler toothbrush punch solvent pinextractor eprompuller pipewrench

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