1. Alfa Laval AB
2. Andritz AG
3. Babcock & Wilcox Enterprises Inc.
4. Bharat Heavy Electricals Limited
5. Byworth Boilers Limited
6. Cleaver-Brooks Inc.
7. Dongfang Electric Corporation
8. ETA Heiztechnik GmbH
9. General Electric Company
10. Harbin Electric Corporation Co. Ltd.
11. Hurst Boiler & Welding Co Inc.
12. IHI Corporation
13. Indeck Power Equipment Company
14. John Wood Group PLC
15. Mitsubishi Heavy Industries
Ltd.
16. Miura Co. Ltd.
17. Robert Bosch GmbH
18. Sid E. Parker Boiler Mfg. Company Inc.
19. Siemens AG
20. Sofinter S.p.A.
21. Sussman Electric Boilers
22. Thermax Limited