Wahlco Environmental Systems Inc.: The manufacturer of...

Wahlco Environmental Systems Inc.: The manufacturer of air pollution control and power efficiency equipment said Wednesday that it has been awarded contracts totaling $7 million from seven companies in four countries. Santa Ana-based Wahlco, which would not disclose the names of the customers, said the biggest contract--for $3 million--is for expansion joints for a Finnish tanker carrying liquefied natural gas.