When energised the electromagnet holds the door open by magnetically attracting a keeper on the door.
Magnetic door holders fire alarm systems.
When activated by a fire alarm the magnet shuts off and releases the door.
A magnetic door holder is a relatively simple device that when powered typically by 24vdc or 120vac will create a magnetic pull.
Wire these holders directly into your fire alarm system.
Electromagnetic door holders and releasers keep doors open until they are released by fire alarm systems remote smoke detectors or other switching devices.
The magnetic portion of this device is installed on the wall that meets the open fire door now to tie this whole concept together you will.
When de energized by a relay controlled by the fire alarm system or other switch the door is released to a closed position checking the spread of smoke and flames.
Both door holders are fitted with an integral manual release button allowing the door to be closed without operating the fire alarm.
Depending on your fire alarm installation you may need to install a magnetic door holder at the location of each fire door.
To close fire doors in an emergency and prevent the spread of fire and smoke.
Both versions are supplied with a door mounting keeper plate.
Electromagnetic door holders allow fire detection and alarm systems to control fire doors.
If the building loses 120 vac power the fire alarm system must switch over to backup batteries calculated to handle all of the devices tied to the system.
The dorgards are great by the way but if the spec is magnetic door retainers they may want them as opposed to dorgards but if its high end property which a flat worth 3 5 mill is id expect a proper fire alarm in tbh a 2 zone panel is cheap enough and will give you the felxibility you need and give you extra income on repairs and servicing.
All are reversible for right or left door swing directions.
These door holder releases have a holding force of approximately 25 lbf 111n.
The device holds a door open while energized.
En1155 1997 cpd approved floor mounted 24v dc door holder 04390 41.
They provide a high holding force.
Door holders draw a lot of current and quickly add to the size of batteries required to properly backup a fire alarm system.
In the event of a fire alarm the electromagnet is de energised releasing the door.
Our cal royal magnetic door holders and magnetic fire door holders are ul listed for both the us and canadian market as well as approval from the california department of forestry and fire for the state of california.
For use with doors that already have a closer these holders keep doors open with an electromagnet.
We offer a variety of magnetic door holder and magnetic fire door holder finishes including us28 luma sheen duranodic and gold.
Primary application includes holding and releasing of fire rated doors that are required to provide a barrier for fire and smoke in an emergency or the convenience of door closure by remote control.
Electromagnetic door holders should be used and.
In the event of a power failure they release the door to a closed position to keep the facility secure.
