ZEVAC Compression Units (click for larger version)
Electric and gas utility company Unitil Corporation, with operations in Maine, New Hampshire and Massachusetts, has some 85,600 natural gas customers (residences and businesses) that it services. Like any utility company, Unitil must work to maintain and upgrade its pipeline system. Typically when working on a segment of pipeline, a company like Unitil will "blowdown" or release/vent the gas in the segment of pipeline being worked on into the atmosphere, for safety reasons. Unitil is investing in a device from a company called ZEVAC that safely captures and transfers gas from one pressurized pipeline to another, instead of venting it into the atmosphere.
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