Actuant Corporation, Milwaukee, WI, has acquired Superior Plant Services, LLC, Terrytown, LA, for $57 million in cash. SPS is a specialized maintenance services company serving the oil &gas and nuclear power industries in North America, primarily in the Gulf of Mexico and mid-Atlantic regions of the U.S. Its services include field machining, flange weld testing, line isolation, bolting, heat treating, and metal disintegration. SPS had $25 million in revenues last year. SPS will operate as part of Hydratight, within Actuant's Industrial Segment. Actuant is a diversified industrial company with operations in more than 30 countries. Actuant has sales of $1.5 …