The 121-12-2 1/2 is a 2.5" inlet commercial and industrial replacement regulator with a spring range of 6" to 14" that uses contemporary design to increase the dependability, simplicity, and economy for greater capacity, higher inlet pressure, faster and more accurate gas regulation. The 121 Series can be used for commercial burners, industrial boilers, kils, gas engines, furnaces, and air heaters where small regulators are enough to insure quality performance, but can also used with large capacity supply applications as well. This dual quality makes the Model 121 excellent for primary control or monitoring of gas flow. It can substitute for zero governor or atmospheric regulators, or differential and back pressure regulators, or relieve valves. These regulators can be used with most non-corrosive non-commerical gases such as natural gas, liquid propane, air nitrogen and more.
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