Working principle
1, a normally closed fire door usually in under the action of a door closer is in the closed state, by Menci switch monitors the state, abnormal feedback to the host, timely by relevant personnel processing to ensure fire when the fire prevention door is closed, so as to prevent the spread of fire and smoke.
2, the normally open fire door usually by electric door device, electromagnetic door stopper, electromagnetic release device such as a normally open, when there is a fire, electric door device such as a terminal control equipment receives the signal after self closing fire door, so that fire door to its due role. Automatically shut the fire door can be manually pushed open, manual open in the case of no resistance again automatically closed.
Functional requirements
Fire door fire rating to reach the standard.
Fire doors around the component is complete, open and close flexible.
Should be able to automatically close the fire door, double door fire door should be closed in order.
The fire door is not locked and can lock.
Normally closed fire door open after the situation should be able to automatically close the resistance.
The fire door is arranged on the evacuation passage and is not provided with an entrance control system, and the control system of the entrance and exit can be automatically and manually.
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