Door Retainers

The Dorgard fire door retainer and Union Doorsense are acoustically operated door retainers. We also provide magnetic and electromagnetic fire door retainers from ICS Security. All types function alongside regular door closers.

Acoustically operated retainers hold the door in an open position. They use a mechanical mechanism to keep the door securely in place until released manually or by the sound of an alarm system. The door closer then closes the door.

Electromagnetically operated door retainers use an electromagnet to hold the door open. When the power is disrupted, or the overide is pressed the door is released, and can be closed by the door closer. These types of retainers can be wired into a fire control system.

Magnetically operated fire door retainers hold the door open with a magnet. To release the door the overide button must be pressed.

One of the primary advantages of door retainers is their ease of installation, and simplicity of operation.

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