The grades of 3 Machinery stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Colfax Corporation (CFX) boosts its rating from a C to a B this week. Colfax Corporation is a supplier of a broad range of fluid handling products and technologies. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of CFX stock.

This week, Chart Industries, Inc. (GTLS) pushes up from a B to a A rating. Chart Industries, Inc. is an independent global manufacturer of highly engineered equipment used in the production, storage and end-use of hydrocarbon and industrial gases. The company also gets A’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of GTLS stock.

This is a strong week for Dynamic Materials Corporation (BOOM). The company’s rating climbs to B from the previous week’s C. Dynamic Materials Corporation is an industrial manufacturer that focuses on niche markets related to the building of equipment and materials. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of BOOM stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.