The multi blade dampers (MBD) for tunnel and metro are independently tested and certified in accordance with internationally accepted standards. Where applicable these tests can also be carried out on multi blade or single blade dampers for other applications.
The fire resistance is tested for 4 hours at temperatures exceeding 1150°C in accordance with BS 476 Part 20.
Continued operation at elevated temperatures (up to 400°C – 2 hours) is tested in accordance with governing guidelines such as the RABT. Additional tests in accordance with other standards such as EN 12101, EN 1363, EN 1366, UL-555, UL-555-S, NFPA 130 & 502, can be carried out upon request.
All thermal tests are carried out by the independent Fire Safety Research Center (FSRC) in Thailand. In addition all thermal tests are witnessed and certified by Lloyd’s Register.
Torque and travel time tests are carried out as part of the standard operating procedures. To prove compliance with structural integrity requirements the dampers have been fatigue tested by TISTR (Thailand Institute of Scientific and Technological Research) at +/- 6000 Pa for 7.9 million cycles. Furthermore, test certificates 3.1 and 3.2 in accordance with EN 10204 can be made available when specified.
Factory Acceptance Tests may include pressure drop tests of the open damper and leakage tests of the closed damper. These tests can be carried out in accordance with AMCA 500-89 and EN 1751.