The functional description of gravity damper damper damper normal gravity damper class ffc-7070 ℃ when the fusible film fuse, the valve is closed under the hammer force or spring force, the blade opening angle is not adjustable Fire dampers, manual reset . Fire control valve normally open fire control valve ffq-7070 ℃ automatically shut down, manual reset, the blade can be adjusted within the range 0-90o opening angle can be output off signal. fff-70a (280) 70 ℃ automatically shut down, self-locking, the output signal is turned off. Manual reset, you can tune in the opening angle of the blade 0-90o range. Fire Fire outlet valve outlet ffkf-70 is equipped with aluminum delivery, air vents, turn off automatically 70 ℃, manual reset, you can adjust the angle of the blades turn in 0-90o. Smoke damper uses (1) usually in a normally closed valve, either manually or automatically open when the fire damper is best to use the fire, when the airflow temperature reaches 280 ℃, the temperature sensor movement Fire dampers, the valve is closed; ( 2) allows the valve is closed by DC24V power; (electric type smoke damper) (3) or manual reset manually shut down; (4) closed DC24V electric reset; (automatic type smoke damper is suitable for manual operation inconvenience where) (5) output signal standard Fire damper valve is closed, you can interlock with other fire-fighting equipment. Advantages smoke damper: 1, low air leakage, airtight performance 2, the electric current consumption of small open 3, strong corrosion resistance and long service life. (Made of stainless steel type) 4, the actuator drive flexible. Feedback, interlock signal accurately Fire dampers wholesalers, Tianjin Fire dampers, liter by liter Swiss Swiss Mechanical and Electrical HVAC Electrical Equipment Factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Swiss electromechanical and you work up into the brilliant, for a better future!