Cut safer with Hi-Lo |
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The principle of mixing oxygen and acetylene within the nozzle of the cutting blowpipe is generally accepted as the best and safest arrangement for cutting mild steel. The safety is enhanced if the design of the nozzle also gives a suction to the acetylene line of the blowpipe. The Hi-Lo nozzle design illustrated limits the amount of explosive oxy/acetylene mixture to the low volume of the drilled and swaged pre-heat passages in the solid copper from which the nozzle is made. Blowpipes which mix the oxygen and acetylene by means of an injector situated near the handle of the blowpipe have a relatively large volume of explosive oxy/acetylene mixture in the pre-heat tube and any backfire can be much more severe. Hi-Lo ANM nozzles are precision manufactured to give efficient performance and before leaving the factory, each one is individually tested to ensure suction to the acetylene line, quality of the pre-heat flame and accuracy of the oxygen cutting stream. |
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