Introduction of Positive Pressure Air Vent:
Positive pressure air outlet is used to pressurize the air in the event of a fire. The positive pressure air outlet will continuously supply air to the front room to maintain positive pressure in the front room to ensure that the smoke does not spread in this area. People in escape space.
When the temperature is higher than 280 ° C, there is no possibility of escape. The internal fuse will blow and the air vent will automatically close to prevent the fire from spreading. It is usually used to install in the front room of the stairs, the wall of the smoke-proof shaft, and can also be installed on the side of the pipe of the smoke-proof system or at the end of the air duct.
Main functions and features;
Normally closed, electric, manual opening.
Output ON signal.
Manual reset is off.
The 280 ° C temperature sensor was activated and the valve was closed again.
The thin mechanism is adopted to reduce the size of the operation box and increase the effective ventilation and smoke exhaust area.
The main technical parameters:
Operating voltage / current: DC24V / 0.5A.
Air leakage: 290m3 / m2 · h≤700 (at a pressure difference of 1000Pa).
The operating temperature of the temperature sensor is 280 ° C.
Application of Positive Pressure Air Vent:
The national code for fire and smoke design of high-rise buildings stipulates that independent mechanical smoke prevention systems should be set up at
1. Smoke-proof stairs without natural smoke exhaust conditions, fire elevator front room or shared front room.
2. The smoke-proof staircase adopting natural smoke exhaust does not have a front room for natural smoke exhaust.
3. Closed refuge floor.
In all three cases, a mechanical pressurized air supply system is provided. At its end is the product and drawing style below the positive pressure air outlet.