Fire door monitoring system of linkage door closers Usually refers to in the stairs aisle, elevator, cable pit, smoke evacuation, and so on some doors closed places. Play the role of fire door monitoring system is in a certain time will meet refractory stability, thermal insulation, can prevent fire spread and diffusion, ensure the evacuation, is the indispensable equipment in fire control work.

The fire door monitoring system is usually divided into often closed fire door monitoring system and often open fire door monitoring system.

Linkage door closers are often closed fire door monitoring system, only when in the closed after a fire linkage door closers can effectively stop the descent of the smoke from fires, in a certain time, fire door monitoring system has the function such as fire, smoke, blocking high temperature insulation.

So, normally closed fire door control system and normally open fire door monitoring system have why to distinguish?

First, normally closed fire door monitoring system is closed at ordinary times, have pushed aside when people need. Normally closed the open fire door monitoring system has certain shortcomings, as a result of the fire door monitoring system installation place is usually personnel often ambulating, caused some contradictions. Internal personnel flow, especially the shopping mall, if in its internal evacuation stair setting often closed fire door monitoring system, due to open and close frequently, fire door monitoring system will soon be damage loss, thus not fire prevention function, form the fire hazards.

Again, often closed when fire door monitoring system can fire, effectively delay the fire and smoke spread to the stairs, fire escape, win precious time for evacuation. So, to keep often closed fire door monitoring system in a normally closed state, can't convenience to open, or the fire door monitoring and control system in order to guard against theft lock.

Beijing branch into the dragon control system co., LTD is specialized in high-tech product development, production and sales and service of high-tech enterprises, is China's security product industry association, deputy director of the unit, vice President of China association of fire units, China fire protection association director unit, passed the ISO9001 quality management system certification unit, a number of national and local relevant technical specifications and product standard of the ginseng units.

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