The difference between the three exhaust valves damper smoke damper in "Ventilation and Air Conditioning Engineering Construction Quality Acceptance quality GB50243-2002" There are instructions on the installation location of fire dampers: 6.2.5 fire dampers, exhaust valve (port) The mounting direction, location should be correct. On both sides of the partition wall of fire dampers, fire dampers, Texas, away from the wall surface should not exceed 200mm. Smoke dampers are mainly used in ventilation and air conditioning systems, fire damper effect, smoke dampers usually installed in the fire separation of the computer room ventilation and air conditioning systems are usually always open when the duct temperature reached 70 degrees in the flue gas is automatically shut down . "Architectural design code for fire protection" provides delivery, return air duct through the wall and floor of the room to set damper, position through the wall at different fire district duct dampers shall be provided. Action is to return air damper system, when the fire occurred in the local pipeline or space, fire dampers, in order to prevent the spread of fire to other partitions, but blocked with other partitions and systems. Fire dampers, spiral duct, electric air valve, valve actuators, valve selection and installation, valve manufacturers, valve legends, outlet valve, manual valve, pressure delivery valve 70 degree damper features: 1. an open state of 2.70 ℃ (ventilation and air conditioning systems), 280 ℃ (exhaust system) is automatically shut down, FHF-70 (280) A type closed after self-locking 3. Manual reset 0-90. The scope of the stepped or stepless adjustment vane opening 4. 5. electrical output signals for the closing action of a group of normally open, normally closed micro switch applicable to studios, hospitals, theaters, classrooms, concert halls, libraries, recreation hall, theater lounge, general offices, shops, hotels, restaurants, and gymnasium. 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, flue damper damper | Hao Yang air conditioning equipment | 90 ° damper is provided by the Texas Air Conditioning Equipment Co., Ltd. Hao Yang. Dampers | Hao Yang air conditioning equipment | 90 ° damper Hao Yang Texas Air Conditioning Equipment Co. (www.dzapjt.com) this year introduced a new upgrade, the above picture is for reference only, please call the contact picture on this page or telephone obtain the latest information, contact: Mr Zhu.