Page 193 - CITS - Fitter Trade Pactical - Volume - 2

FITTER - CITS

Fig 5

• Ensure that your hands are free from grease or oil.

• Connect the oxygen regulator to the oxygen gas cylinder (righthand threads).
• Connect the acetylene regulator to the acetylene gas cylinder (lefthand threads)
• Ensure the pressure adjusting screws of both regulators are in a released condition.
• Be sure to connect the correct regulator on cylinders, Acetylene connections have left hand thread and oxygen
has right hand thread.
• The acetylene regulator connecting nut will have a groove cut on it (Fig 6) and the pressure gauge dial will be
of maroon colour.

Fig 6

• All threaded connections should be fixed intially by tightening by hands and then only a spanner should be
used. This will help to avoid assembly with cross thread leading to damage to threads.
• Always use the correct size spanner to prevent damage to the threads (Fig 7)

• It is dangerous to apply lubrications in the threaded assemblies of gas welding equipment as it can cause fire
(Fig 8)
• While tightening avoid undue force. The connections should be just tight.

• Connect the hose connector at the regulator end and the hose-protectors at the blowpipe end.
(use black hose for oxygen line and maroon hose for acetylene line.)
• Acetylene connections have left hand threads with a cut on the corners of the nut while oxygen connections
have right hand thread without a cut.
• Attach one end of the black hose-pipe to the oxygen regulator outlet and the maroon coloured hose-pipe to the
acetylene regulator outlet (Fig 9)

• Secure the joints using hose-clips to ensure good grip and to avoid gas leakage (Fig 10)

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CITS : C G & M - Fitter - Exercise 53