A smoke fire damper, smoke damper main functions and characteristics DC24V electrical signal can quickly open the valve manually shut output signal, interlocking exhaust fan is turned manually reset to the open PY-02YSD exhaust valves can manually open the damper remote control , remote control manual reset Second, smoke damper Size Size (A × B × L) rectangular: 320 × 320 × 210 ~ 2000 × 1250 × 210 round: good Φ320 ~ Φ1500 where the damper quality, thickness: L = 320 Third, the exhaust valve actuator circuit diagram of a smoke damper, fire control valve, 70-degree fire dampers, exhaust valves, dampers works, fire dampers picture, damper mounting position of the damper 280 wiring diagram, exhaust fans, diffusers, air valve, positive pressure blower, air flow control valve, damper prices, flue damper 280 degrees usually blows smoke damper should be normally closed or normally open? This is based on the actual design and waited, and now is the brand recommended damper linkage, normally closed by a fire alarm linkage, open exhaust fan automatically open exhaust valve. There are generally two dampers one is 70 degrees and 280 degrees! 280 degrees smoke damper in the exhaust system in general, under normal circumstances is normally closed when the fan starts to open, the temperature exceeds 280 degrees closed. Smoke damper, fire control valve, 70-degree fire dampers, exhaust valves, dampers works, fire dampers picture, fire dampers installation location, wiring diagram 280 degrees fire dampers, exhaust fans, diffusers, dampers, positive pressure blower, air flow control valve, damper prices, where the flue damper damper damper Jincheng good quality _ _ Hao Yang air conditioning equipment (view) from the Texas Air Conditioning Equipment Co., Ltd. Hao Yang. Hao Yang Texas Air Conditioning Equipment Co. (www.dzapjt.com) is a professional, "fan coil units, air, mixed flow fan, FRP fan, fire dampers, air-flow valve" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "Hao Yang" brand has a good reputation. We adhere to the "service first, customer first" principle, so that Yang Hao air-conditioning equipment to win the trust of customers all of the fan, ventilation equipment, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!