The positive pressure air outlet is composed of an aluminum alloy air outlet and a fire damper. It can be effectively and widely used for the outlet or suction of the ventilation and air-conditioning return air ducts with fire protection requirements. It is usually installed on the side of the duct or on the end and wall of the duct. Under normal circumstances, the air outlet is used to adjust the flow direction of the air supply, which can ensure positive pressure air supply, and ensure that the air volume of the positive pressure air supply port is delivered as required. The positive pressure air outlet in the stairwell will not buffer instantaneously.
Normally closed, electric and manual open.
Output start signal.
Manual reset closes.
The 280°C temperature sensor acts and the valve closes again.
The thin mechanism is adopted to reduce the size of the operation box and increase the effective ventilation and smoke exhaust area.
When a fire occurs, the internal electric actuator will open the air outlet, the thermal smoke sensor or the manual fire alarm will be turned on, the positive pressure fan on the top of the tower will be automatically turned on, and the air supply shaft will be pressurized to supply air, and the front room of the stairs will pass through. The positive pressure air supply port will supply air to the front room, so that the front room maintains positive pressure, so as to ensure that the smoke will not spread in this area, and give people a space to escape. When the temperature is higher than 280°C, there is no possibility for people to escape, the internal fuse will be blown, and the air outlet will be automatically closed to prevent the spread of fire.
Application: It is stipulated in the National Code for Fire and Smoke Exhaust Design of High-rise Buildings that independent mechanical smoke prevention systems should be set up in the following parts
1. Smoke-proof stairs that do not have natural smoke exhaust conditions, fire-fighting elevator front room or shared front room.
2. The smoke-proof staircase with natural smoke exhaust is adopted, and it does not have a front room with natural smoke exhaust.
3. A closed refuge layer.
In the above three cases, a mechanical pressurized air supply system is required. At the end is the positive pressure air outlet. Below are the styles of products and drawings.
Manual actuator, responsive and easy to operate.
Good air tightness.The use of sealing sheet treatment ensures that the air leakage of the fire valve can reach the standard again
Strong bearing pressure, easy to use continuously, can withstand greater pressure
Craftsmanship.We have advanced production equipment, good molding process and strong sealing.
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