Hao Yang, 70 degrees to 70 degrees damper damper installed in the central air-conditioning duct system works membership fusible alloy temperature control, by the action of gravity and spring mechanism closes the valve. When a fire occurs, the flame duct invasion, high temperature melting fusible alloy valves, or to make memory alloy deformed the valve automatically closes for the duct and the fire district throughout the occasion. Greider fire dampers, fire control valve: Normally open damper actuators prices close to 70 degrees, usually installed in the duct through the firewall, fires off the role, you can set the output electrical signal, smoke more than 70 degree valve closed, sending chain (s) off the fans; 70 degrees damper prices, manufacturers of 70 degrees to 70 degrees damper damper actuators, Texas 70 degrees damper manufacturers, wucheng cheapest 70 degrees damper manufacturers. Fan coil units, air, glass blower, air-flow valve dampers, LCD thermostat, Air Conditioning Equipment Co., Texas Hao Yang smoke fire control valve (ordinary) Size Size (A × B × L) rectangle: 200 × 200 × 220 ~ 2000 × 1250 × 220 round: Φ320 ~ Φ1600, thickness: L = 320 special specifications can be customized. Fire dampers, spiral duct, electric air valve, valve actuators, Siemens valve actuators, valve selection and installation, valve manufacturers, valve legends, outlet valve, manual valve, pressure delivery valve; smoke damper, fire control valve, 70-degree fire dampers, exhaust valves, dampers works, fire dampers pictures, damper installation location, wiring diagram 280 degrees dampers, exhaust fans, diffusers, dampers, positive blower, air flow control valve, fire dampers price, Jinan flue damper damper damper mounted where _ _ Hao Yang air conditioning equipment (certified merchants) air-conditioning equipment by Texas Hao Yang Limited. Air Conditioning Equipment Co., Texas Hao Yang (www.dzapjt.com) is specialized in the "fan coil units, air, mixed flow fan, FRP fans, dampers, air flow control valve" of the enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr Zhu.