This document provides technical specifications for a pneumatically operated butterfly damper with a double acting actuator. Some key details include: - The damper is 3000mm x 350mm with 10mm thick housing and flaps made of IS2062'B' material. - It includes a Sude make DA70 pneumatic rotary double acting actuator that opens and closes in 31 and 30 seconds respectively. - Optional accessories included are flow control valves, a filter regulator and lubricator, manual ball valves, solenoid valves and more. - The damper is warranted for 18 months from supply or 12 months from installation, whichever is earlier.