Installed in the central air-conditioning air duct system, the working principle is to use the temperature control of the fusible alloy to close the valve by using the action of gravity and the action of the spring mechanism. When a fire occurs, the flame invades the air duct, and the high temperature melts the fusible alloy on the valve. Or make the memory alloy deform to make the valve automatically close, which is used for occasions where the air duct and the fire zone run through.

Fire Damper:
1. Normally open and closed at 70 degrees. It is generally installed at the place where the air duct passes through the firewall. It plays the role of fire shutdown. The output telecommunication signal can be set. When the smoke sense exceeds 70 degrees, the valve is closed and the chain feed (supplement) fan is closed.
2. Smoke prevention and fire prevention regulating valve is normally open and closed at 70 degrees. It is the same, but one more telecommunication signal is input and can be remotely controlled and closed by the fire control room. It is generally used in the common air duct system of air supply and air supply for fire. In case of fire, the room that does not need air supply can be controlled and closed.
3. Fire dampers are fused and closed at 280 degrees, normally open, and output telecommunication signals. This is similar to 1, except that the fusing temperature is different. It is generally applied to the place where the fire exhaust pipe passes through the firewall. When the flue gas temperature exceeds 280 degrees, it is automatically fused and closed, and the smoke exhaust fan can be shut down in chain.

Smoke exhaust valve:
1. Smoke exhaust fire damper (normally closed, telecommunication signal open, 280 degree fuse closed, or manually closed) is generally used in smoke exhaust system. One can be installed at the suction port of smoke exhaust fan. In case of fire, the smoke exhaust fan can be controlled to open by the fire control room, and the smoke exhaust fan can also be interlocked when closed.
2. Smoke valve, the same as the above 3, that is, fire valve, each unit is called different, some are called smoke valve according to its operating temperature, and some are called fire valve according to its nature of use, but for the equipment side, only the fuse metal of ordinary fire valve is replaced by the 280-degree fuse..
Fire damper 3. Full-automatic smoke exhaust fire damper (for subway engineering) Fire prevention of underground railway ventilation and air conditioning system. The smoke exhaust valve has the function of linkage control with automatic fire alarm equipment and gas fire extinguishing system. Each full-automatic smoke exhaust fire damper has two independent electric control signals, which are respectively monitored by EMCS and gas elimination system. The control signals are DC24V 10% signals, each full-automatic smoke-proof fire damper has six independent feedback signals (three in place and three in place). The feedback signals are all normally open passive contact signals.

Smoke vent:
If you install the necessary smoke exhaust valve on the pipeline, use the ordinary single-layer louver tuyere, otherwise you need to use the plate exhaust port, which also has the mechanism of smoke exhaust fire damper.
The actuator of smoke-proof fire damper is mainly used in mechanical smoke exhaust system. It is a 280 ℃ fire damper, which is usually closed. In case of fire, it will be automatically opened by automatic fire alarm and fire damper dynamic signal. At the same time, it has manual actuator, which can be manually opened or remotely opened in the fire control center (I .e. linkage control, manual control and automatic control). It is generally installed at the smoke exhaust port and the air duct passes through fire prevention, the partition of the smoke prevention zone and the air duct of the smoke exhaust machine room shall be closed when the temperature of the smoke in the air duct reaches 280 ℃.
During construction, detailed construction drawings and on-site verification shall be provided to ensure the correct construction of equipment foundation. On the basis of civil engineering handover, relevant technical data and various measurement records shall be submitted, and the elevation datum line and vertical and horizontal center line shall be clearly marked on the basis.
Before equipment installation, the foundation must be checked and accepted against the civil engineering drawing, installation drawing and actual size of the equipment, so as to confirm that there is no problem with the foundation and ensure safety, quality and progress. After the foundation is checked and qualified, the civil engineering shall handle the intermediate handover, and the handover procedures can be handled after qualified.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures