| CPC F17C 13/025 (2013.01) [F17C 5/06 (2013.01); F17C 13/04 (2013.01); F17C 2221/033 (2013.01); F17C 2223/0123 (2013.01); F17C 2225/0123 (2013.01); F17C 2250/043 (2013.01)] | 19 Claims |

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1. An apparatus, comprising:
a high-pressure tank;
a first piping configuration connecting the high-pressure tank to a first indirect heater;
a second piping configuration connected to an exit side of the first indirect heater and the second piping configuration branches off into two piping branches, with:
a first piping branch including a first valve and a first fail-close valve, and a first control valve, wherein the first fail-close valve is connected to a first inverse acting valve and the first control valve is connected to a first controller, and
a second piping branch including a second valve and a second fail-close valve, and a second control valve, wherein the second fail-close valve is connected to a second inverse acting valve and the second control valve is connected to a second controller;
a third piping configuration that occurs after the first valve, the first fail-close valve, the first control valve, the second valve, the second fail-close valve, and the second control valve, wherein the third piping configuration is a combination of the first piping branch and the second piping branch;
a second indirect heater that is connected to the third piping configuration, wherein the second indirect heater is closer to the first control valve than the first fail-close valve;
a fourth piping configuration, connected to an exit side of the second indirect heater, wherein a third control valve is located on the fourth piping configuration and the third control valve is controlled by a third controller,
wherein the third controller is connected to a pressure reader connected to the fourth piping configuration;
and
a compressor.
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