1. Balcke-D?rr GmbH
2. BHEL
3. Ducon Environmental Systems
4. ELEX AG
5. FLSmidth A/S
6. Fujian Longking Co. Ltd.
7. GEA Group Aktiengesellschaft
8. John Wood Group PLC
9. KC Cottrell
10. Mitsubishi Heavy Industries
Ltd.
11. S.A. HAMON
12. Sumitomo Heavy Industries
Ltd.
13. Thermax Limited
14. Trion IAQ
15. Valmet Corporation