Sealey SGA1 - Manual (Page 2)

3. asseMBlY
3.2 cOnnectinG tHe Gas ReGulatORs tO tHe cYlindeRs.
nOte: Pressure regulators should be treated as precision instruments and should not be jarred or knocked.
3.2.1 function of the regulators. fitted to the outlets of the gas cylinder valves, the pressure regulators reduce the pressure of
the gas from cylinder pressure to the constant lower pressure required for the operation of the equipment. the left hand
gauge indicates the pressure in the cylinder. the right hand gauge indicates the pressure of the gas being delivered to the
torch. Pressure reduction within the regulator occurs in two stages.
3.2.2 Attach oxygen and acetylene regulators to the appropriate cylinders. on each gauge ensure the inlet filter is in place and
is not blocked or contaminated. If an '0' ring is fitted to the inlet, check for damage and replace if necessary with an '0' ring
recommended by the regulator manufacturer. do not use any form of jointing paste or tape between regulators and
cylinder valves. Before attaching the gauges wipe the fittings with a clean dry cloth. screw the union at the base of each
regulator to the appropriate cylinder by hand. ensure that the guage is correctly orientated so as to be seen properly by
the operator in use. to tighten, turn clOckwise for OXYGen, and anti-clOckwise for acetYlene. A wrench
should be used to ensure tight connections.
3.2.3 close the regulators by turning the adjusting screws anti-clockwise to relieve the pressure on the diaphragm before
opening the cylinder valve. If this is not done, pressure from the cylinder can damage the diaphragm and render the
regulator inoperative.
3.2.4 the cylinder valve-to-regulator connection should be checked for leaks using an approved leak detection spray or soap
and water solution.
3.3 cOnnectinG tHe FlasH aRRestORs and HOses tO tHe Gas ReGulatORs.
3.3.1 connect the Blue, OXYGen flash arrestor to the outlet on the OXYGen regulator. (As shown above, on the left).
3.3.2 then, connect the Blue hose to the Blue, OXYGen flash arrestor. (As shown above, on the left).
3.3.3 connect the Red, acetYlene flash arrestor to the outlet on the acetYlene regulator. (As shown above, on the
right).
3.3.4 then, connect the Red hose to the Red, acetYlene flash arrestor.(As shown above, on the right).
3.3.5 tighten all nuts securely with a wrench. If any sign of oil or grease is found on the flash arrestors or regulators discontinue
use immediately.
nOte: new hoses contain a preservative powder which must be blown out before use.
3.3.6 Prior to attaching the torch, blow out both hoses to eliminate any particles or debris. Perform this on one hose at a time
and in a well ventilated area, otherwise you may create conditions for fire or explosion.
a. turn the oxygen or acetylene regulator adjusting screw clockwise to allow 5psi to pass through hose.
b. Allow oxygen or acetylene to flow for approximately 10 seconds to purge each hose in turn.
3.4 asseMBlinG tHe tORcH FOR weldinG.

waRninG! the teflon seal on the welding attachment inlet must not be damaged or missing, otherwise gases will mix
inside the torch and result in flashbacks or backfires. Always inspect the seal, coupling nut and torch head for damage or
oil. If either is found, discontinue use and contact your supplier.
3.4.1 screw the chosen welding nozzle into the welding attachment making sure that it is fully tightened down.
3.4.2 screw the welding attachment with nozzle attached onto the torch handle as shown below. Before fully tightening the
ribbed nut, check that the orientation of the gas valve knobs suits your normal welding practice. Adjust if necessary and
fully tighten the ribbed nut .
 waRninG! danger of explosion. All parts which come into contact with acetylene or oxygen, including hands and tools,
must be free from oil or grease. If grease or oil is found on a cylinder, discontinue its use immediately and contact your
gas supplier.
3.1 Preparing the cylinder. Make sure that the cylinder to be used is safe and properly secured as noted in the safety
precautions.
3.1.2 Whilst standing on one side ‘crack’ each cylinder valve. ‘cracking’ is to quickly open and close the valve allowing gas to
escape and clear the valve of any foreign bodies.
© Jack sealey limited Original Language Version sgA1.V3 Issue: 1 - 27/09/13