Excalibur Neck 280mm - AHT #25 Type 3 / 5 Copper Heat Sink

AHT #25 Copper Neck Type 3 / 5 AHT #25 heating tip neck - Designed to fit the standard type 3/5 mixer. The 280mm bent neck has been produced from thick section copper tube to ensure maximum heat conduction from the AHT nozzle along the neck and minimise heat build up, thereby increasing tip life. The AHT heating tip provides instant "spot heating" provided by acetylene's unique ability to impart heat very quickly into the work piece which just cannot be achieved with any other commercially available oxy / fuel gas process. Oxy / acetylene is the only mainstream fuel which burns with a neutral flame which can be so important for many processes. Quick, instant spot heating right where you need it. Due to the design the AHT the nozzle range is more stable than when using a similar size single flame welding nozzle however the correct setting is just as important so set up correctly and when lighting the yellow acetylene flame remember to turn up the flow until the black soot / smoke just disappears then introduce the oxygen as that will set the correct nozzle flow. When flowing correctly the nozzles should not snap out or go bang, if they do one or two factors are not correct with your set-up - most commonly it will be lack of flow or damage to the outlet holes. The AHT#25 may be safely operated from a single industrial acetylene cylinder. DO NOT USE the AHT #25 heating nozzle on an actylene cylinder smaller than 3.5 cubic meters capacity (or 3.5 kg) This neck fits the standard Type 5 acetylene mixer for use up to nozzle size #35 maximum. https://www.weldingdirect.co.uk/Standard-DA-Mixer---Type-3-5-Acetylene

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