Rectangular damper is also known as air door, the introduction of CE technology production. Mainly used for thermal power plant smoke duct, for river closure by the medium. Highest working temperature: less than or equal to 420 degrees Celsius, the maximum working pressure: 2000 mmh2o, air leakage rate: less than or equal to 2%, the product according to the water and electricity of the pulverized coal smoke wind pipe 74 typical design of standard drawings for production.

Uniaxial and biaxial, three axis, four axis, and five axis, such as five types, specifications have 300 * 2000 * 400-400, 66. According to the label DD4201 - DD4266 4 dd drawings.

The location of the damper can be horizontal layout and vertical layout. Garden damper prominent part of the shell and the party before the air door spindle bearings bearing neck, used for installing a pot wheel box. Garden damper with side air door are installed to ensure fully open baffle block.

The damper itself without any transmission device, can be selected as required. About the gear type and specification etc. See "drive" part of the specification.

Throttle actuator drive torque 8 kg/m and 30 kg/m. 17 * 17 mm throttle shaft and worm gear box axis of 22 mm with 8 kg/m torque transmission. 32 * 32 mm throttle shaft and worm gear box axis 32 mm with 30 kg/m torque transmission.