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Tractor Talk Discussion Forum

cutting torch regulators

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Don c

01-24-2008 06:25:05




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Would like to know what the difference is between single and two stage regulators. Looking at a new cutting outfit and nothing is said what the gages are, I am sure they are the right ones for the outfit but I am just curious. Thanks for the answers... Don c




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Don L C

01-24-2008 07:40:40




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 Re: cutting torch regulators in reply to Don c, 01-24-2008 06:25:05  
Don,I bought the double regulators.....You only buy them once in a life time.....
I have a large set and a small set on the same regulators....been working for me about 37 years...my $0.02

Don L C southwest Ohio



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Texasmark

01-24-2008 06:41:50




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 Re: cutting torch regulators in reply to Don c, 01-24-2008 06:25:05  
A single has the pressure of the contents of the bottle against one side of a diaphragm and pressure from the regulator handle on the other. It"s a differential pressure thing.

Problem with that is that as your bottle looses pressure the ratio changes so your output changes causing you to have to readjust your outpressure.

A dual stage has 2 regulators and the regulated output of the first is what feeds the second. Since there is some regulation of the input to the second one, the opportunity for the second to vary in pressure output is severely limited.

Not really worth the money for small time operations like my farm shop.

Mark

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Texasmark

01-24-2008 06:48:36




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 Re: cutting torch regulators in reply to Texasmark, 01-24-2008 06:41:50  
This will never happen again. Check the posting times on these three replies. Obviously they mention nothing about the others beins we were all typing at the same time. Grin

Mark



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Greg_Ky

01-24-2008 06:50:28




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 Re: cutting torch regulators in reply to Texasmark, 01-24-2008 06:48:36  
Lottery Ticket Time



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Greg_Ky

01-24-2008 06:39:38




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 Re: cutting torch regulators in reply to Don c, 01-24-2008 06:25:05  
Single stage - as the tank pressure drops you have to adjust the pressure. Two stage - will keep a constant pressure until the tank is empty without having to adjust the pressure - Just set and forget.



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Kentb of SWMO

01-24-2008 06:38:21




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 Re: cutting torch regulators in reply to Don c, 01-24-2008 06:25:05  
Most torch set have a single stage regulator. This means the pressure from the tank is reduced in ONE step. A two stage regulator has a first stage that is fix at some pressure below the pressure of a full tank. The adjustable second stage uses the lower output of the first stage as an input. I have been told the only advantage to a two stage is if you are doing very delicate work on thin material the flame will be more stable.

Kent

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135 Fan

01-24-2008 10:18:26




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 Re: cutting torch regulators in reply to Kentb of SWMO, 01-24-2008 06:38:21  
I agree with that. It's the reverse of a 2 stage air compressor. All regulators have to be UL listed. I have never had any problems with a single stage regulator. For all intense purposes you will never notice the difference between a single and 2 stage regulator. Where you could possibly notice a difference was if you were doing a lot of O/A welding or like was mentioned doing very delicate work with a small tip. 2 stage means tank pressure to working pressure is done in 2 stages. Not normally needed. Dave

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