With naturally aspirated, you need the pressure to drive a small stream of propane through the jet. With a blown system, you aren&#;t relying on the propane flow for your air flow (the blower does that) so the propane pressure does not need to be so high.
In either case, it&#;s important to control the air:fuel ratio. For propane, that&#;s ~15.7:1 for optimum combustion (stoichiometric). You will control that with the blower speed, blower restriction, propane pressure, and propane restriction. Lots of ways to do it. Your overall heat power input will depend on propane flow and mix ratio. Since you want efficient combustion, let&#;s say you will tune for stoichiometric mix.
To get the most power (highest rate of heat input), you will run the blower wide open. That delivers a certain amount of air. Now you need propane to match, so you will adjust the regulator pressure to deliver the right amount of propane. If your jet (restrictor on the end of the propane line) is too small, even with the regulator maxed out, you won&#;t get enough propane. But there&#;s no need for a small jet in your case, so by balancing the jet size against regulator pressure, you can achieve the propane flow necessary to get the stoichiometric mix you want with full blower output. That will be the maximum heating power for your forge. If you want less heating power, you will reduce airflow and propane flow proportionally (by blocking off the blower and reducing propane pressure).
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It is essential to the proper management of an industrial fluid system to keep process conditions precise. That includes maintaining proper pressure, which requires choosing the correct industrial pressure regulator for the system.
Selecting the right type of regulator requires an understanding of what is required by the particular application (including system requirements and objectives), what is available and what features should be considered. Here are some general guidelines for common situations.
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Analytical instrumentation applications
When choosing regulators for sensitive analytical applications, exact target pressure stability is required to ensure analytical precision.
Specialized single- and two-stage spring-loaded analytical and instrumentation regulators provide consistent process outputs with proper pressure control and give users the confidence that their test results are accurate. Typically, these regulators are available in back-pressure and pressure-reducing designs and are easy to adjust, giving end users precise control over pressure levels and the ability to change them quickly as necessary.
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