EB Air Control’s Bubble Tight – Industrial Positive Seal Damper has been designed to handle and contain clean or foul air/gas that poses a danger to health and the environment if not handled properly. Our experience in the industry is that there is hardly any “TIGHT SEAL” damper or butterfly valve which will contain harmful materials safely and effectively over a period.

In order to meet, if not exceed, the requisite EB Positive Seal Air Damper was tested to quarter million cycles according to the ANSI/ASME, N510-1989 pressure decay method and article 6.4. The conclusive leak test result was 0.00002cfm at 10” WG pressure differential which according to our available information could not be met by most butterfly valves or Airtight dampers offered in the market. We have successfully carried out a leak test on 24” and 36” diameter valves up to 0.5 bar for 15 Minutes for prospective clients in Hong Kong (Science Park).