Exhaust valve installed in the exhaust system of the pipeline, the general was usually closed, manual or electric opened fire, from the smoke effect. When the internal temperature of the flue gas exhaust pipe reaches 280 ℃ closed within a certain period of time to meet the fire resistance stability and fire integrity requirements, from the exhaust valve function. Smoke damper normally closed (NC, open telecommunications number, 280 degrees blown off, or manually turn off) generally used in exhaust systems, exhaust fan can be installed at the inlet of a control to open the control room when the fire extinction, When the chain can also be turned off to close the exhaust fan. Exhaust valves, with the three, each unit is called different dampers, some based on its operating temperature is called the exhaust valves, and some based on its use of nature called damper, but just an ordinary damper device side fuse metal fuse into that kind of 280 degrees. 3. Automatic smoke damper (Metro Engineering) fire subway ventilation and air conditioning systems, exhaust valves have automatic fire alarm equipment and gas extinguishing system linkage control functions. Each automatic smoke dampers have two independent electric control signal, respectively, by EMCS, gas consumption system to monitor, control signals are DC24V ± 10% signal. Each automatic smoke dampers have six independent feedback signal (three open place, three off place) feedback signals are normally open dry contact signal. Choice points Editing 1. damper main control parameters for the selection and specification. 2. damper suitable for ventilation and air conditioning systems, in addition to public buildings, kitchen hood system with dampers, operating temperature of 150 ℃, the general ventilation and air conditioning systems with fire dampers operating temperature of 70 ℃. 3. The damper is suitable for pipe ventilation, air conditioning or exhaust system, the scope and application of the basic functions in Table 1. 4. The selection of valve should pay attention to the function of the valve, normally open or normally closed, shut down automatically open, close the open hand, manual reset, signal output, remote control and other requirements. 5. If the valve and fan interaction should be used with double micro-switch device. 6. The valve should be steel blade thickness of 2 ~ 6mm, the body of non-combustible materials damper installation, rotating parts should be corrosion-resistant metallic materials, and flexible rotation. Shall not be less than the thickness of the valve housing 2mm. Yi Rong parts shall comply with recognized standards of the fire department. Products: Electric leafy off valve, with the composition of the sleeve valve with German imports PS Series actuators. Within the electric actuator servo system, without reprovision servo amplifier has an input control signal (4-20mADC or 1-5VDC) and single-phase power to control operation to achieve the pressure, flow, temperature, level and other parameters to adjust . Adopts balanced valve plug structure fire dampers price, with good valve plug stability, easy to produce vibration, low noise sensitivity, allowing the use of a large pressure difference, simple connection, which is widely used for flow coefficient, leakage requirements more strict electricity, metallurgy, petroleum, chemical industry, light industry, industrial automatic control system. Damper prices, Pingdingshan fire dampers, air conditioning provided by Rui Xincheng Rui Xincheng Air Conditioning Equipment Co., Texas. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.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 Rui Xincheng air conditioning and you hand into the brilliant, for a better future!