The valve is normally open or normally closed, the control center or the field is connected, the DC24V power supply valve is opened, and the power-off valve is automatically closed.
When the pipeline temperature reaches 70 ℃ or 280 ℃, the valve will automatically close, and when it is lower than 70 ℃ or 280 ℃, the valve will automatically reset.
Valve control voltage DC24V, current ≤ 0.3A.
Output passive shutdown signal.
The electrical protection level of the valve is IP55-IP67.
Valve explosion-proof grade Exd II BT4.
Electric fire valve material is mainly divided into: carbon steel, galvanized sheet.
Electric fire valve installed in the ventilation, air conditioning system to send, return air pipe, usually open state, fire when the pipe smoke temperature reaches 70 degrees when closed, and in a certain period of time to meet the smoke leakage and fire integrity requirements, from the role of fire.

(1) The valve is normally open at ordinary times. When the airflow temperature reaches 70 ℃, the fire damper [1] acts as a temperature detector and the valve is closed.
(2) The valve can be closed by DC24V power supply.
(3) Manual shutdown or manual reset.
(4) Manually adjust the opening degree of the blade within the range of 0 ° ~ 90 ° (adjustable type).
(5) the output valve closed signal, can be interlocked with other fire prevention equipment.
In normal times, the top of the fuse core rod blocks the fork plate on the valve shaft (blade shaft) to make the valve normally open. When a fire occurs, the temperature of the airflow in the pipeline rises to the fuse, and the fuse is easy to fuse. When the temperature occurs, the fusible plate is fused. The core rod is pushed by the spring to disengage the fork plate. The valve shaft rotates under the action of the torsion spring to close the valve. In normal times, the opening of the valve can be adjusted through the handle linked with the valve shaft (blade shaft). When the requirement is met, the position is fixed by the butterfly nut. The contact between the fork plate and the handle is provided with ring teeth to prevent sliding after meshing, so as to keep the opening of the valve unchanged after adjustment. An output device (cam, micro switch, connection terminal, etc.) for closing the electric signal fire damper can be added as required by the user.
Fire damper is used to automatically block the hot air flow from the fire disaster area, the flame valve, can manually adjust the air volume, the temperature sensor action to close the valve, the output signal after the action, and some such as electric fire damper, pneumatic fire damper, automatic fire damper and smoke exhaust fire damper.
When the valve is installed and put into use, the handle must be turned counterclockwise to make the shaft pin of the head of the temperature sensor jam the opening of the handle. At this time, the valve is opened and the air flow normally passes through the valve. When the air flow temperature in the pipeline exceeds the action value of the temperature sensor (70oC or 280oC), the temperature sensor is fused and the shaft pin is retracted under the action of spring force. The torsion spring inside the mechanism drives the valve blade to close, preventing the spread of fire.
What are the indispensable inspection items for fire dampers.
Fire damper is a kind of fire fighting component, and as a fire damper anti-parts that when applied in various environments to carry out the necessary inspection items, smoke fire damper quality inspection by the professional inspection department to carry out, according to the inspection basis, inspection items and other provisions, sampling inspection, the main purpose is to smoke fire damper quality unified provisions.
Common inspection items for smoke exhaust fire dampers include the reliability of smoke exhaust fire dampers, air leakage at ambient temperature, fire resistance and other aspects. The inspection of smoke exhaust fire dampers is carried out in accordance with the provisions of "Fire Valves for Building Ventilation and Smoke Exhaust Systems". The above items are mandatory inspection items and are items that smoke exhaust fire dampers must meet the standards.
Several inspection items of fire dampers are indispensable. One is to meet national standards, but to allow users to safely use fire dampers. Other knowledge about fire dampers can also be learned through this website. Our news column will continue to provide professional knowledge about fire dampers and smoke exhaust fire dampers.
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