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.
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Today's Featured Article - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
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