1. Andritz Ag
2. Babcock & Wilcox Enterprise Inc
3. Chiyoda Corporation
4. Doosan Lentjes Gmbh
5. Ducon Technologies Inc
6. Flsmidth A/S
7. Fujian Longking Co Ltd
8. General Electric Company
9. Hamon Group
10. John Wood Group Plc
11. Kawasaki Heavy Industries Ltd
12. Marsulex Environmental Technologies
13. Mitsubishi Hitachi Power Systems Ltd
14. Rafako Sa
15. Thermax Ltd