Helidyne offers power generation and gas processing technology to the Oil & Gas industry with its new Planetary Rotor Expander.

Model 4400 Pressure Reduction Generator (PRG) is the company’s first commercialized and fully automated power generation package with a capacity up to 60 kWe.

How it Works


The expander is driven by gas pressure not combustion, so electricity generated is 100% emission free. With a pressure rating of 1,440 psi, its ideal for waste pressure recovery applications like those found at regulator stations and city gates located along natural gas pipelines.

The proprietary planetary rotor design is self-cleaning and can handle “wet” gas at the expander inlet, making it uniquely capable for harsh Oil & Gas applications.


Natural gas processing often involves dropping gas pressure across a J-T valve to cool and condense out Natural Gas Liquids (NGL’s). Other than cooling, the process is a complete waste of energy.

Using Helidyne’s expander to by-pass the J-T valve, cooling capacities equivalent to refrigeration can be reached at half the cost. Also, electricity generated by the expander is used for skid pipe heating to eliminate downtime from “freeze-up” –a common issue for both J-T skids and refrigeration units.

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