Texas fire control valve suppliers of quality, your best choice Tel: 18653444408 Manager Wu product choice points: 1. The fire damper control parameters for the selection of the main specifications 2. damper suitable for ventilation and air conditioning systems in public buildings except the kitchen drain. fume system with dampers. operating temperature of 150 ℃ outside general ventilation and air conditioning systems with fire dampers operating temperature of 70 ℃. 3. damper suitable for ventilation. Air conditioning or exhaust pipe system scope and application of the basic functions of Table 1. The selection of valve should pay attention to the valve function. normally open or normally closed. Auto OFF ON Manual OFF ON manually reset signal output. remote control and other requirements. 5. If the valve and fan interaction should be used with Double micro-switch device according to the valve plate thickness of the blade should be 2 ~ 6mm body of non-combustible material rotating parts should be corrosion-resistant metal material and flexible rotation http:..... //www.hqktsb. com