Doosan Portable Power offers a line of natural gas mobile generators with the NG160, NG225 and NG295. They operate in remote locations and harsh environments. They are designed for oil and gas, site preparation and production, and industrial plants. A patent-pending Onboard Scrubber System improves machine performance by removing excess dirt and water from wellhead gas. It includes a heated drain valve to prevent water removed from the gas from freezing in the hose — an event that could disrupt the flow of natural gas and possibly cause the machine to shut down. An automatic dual-fuel switch allows the generator to operate on natural gas, as well as propane from an external tank. This ensures continuous generator operation in the event that wellhead gas flow is interrupted or unavailable.