[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - damper] 70 degrees dampers used in air conditioning, ventilation system pipes; usually normally open and close the damper when the fire, fan interlock 220v damper, the fan turned off; 280 degrees dampers used in the exhaust system pipe, usually always open fan damper, smoke in case of fire, when the flue gas temperature reaches 280 degrees, the damper is closed, the fan interlock is closed. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product -] 280 degrees using the fire dampers on exhaust pipes, and the rest by the fire district with a high of 70 degrees damper regulation say "smoke damper" Unlike "damper." Class 1 fire, fire dampers: the role of the fire, 70 ° C temperature fuse automatically close linkage 150 ℃ fire dampers, ventilation and air conditioning systems used within the duct 2, smoke dampers: to rely on smoke control action, electric closed ( smoke), but also 70 ° C temperature fuse is automatically turned off (the fire) in the ventilation and air conditioning systems for the fan duct damper damper _ _ Tianjin Tianjin Jinzhong Ji damper manufacturer provided by the Tianjin Jinzhong Ji HVAC purification equipment. Tianjin Jinzhong Ji HVAC purification equipment Limited (www.Jzjnt.com) strong, credible, in Tianjin fans, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the group into the brilliant and you work for a better future!