1Door suction is a supporting products of fire door system, essential device for fire door control. 2With a manual release button, easy to operate, convenient for using. 3Strong suction, good stability, release without residual magnetic while power failure. 4Normally keep the fire door open by power supply; release the fire door by controlled power failure during fire; the fire door will be closed under the action of the door closing device. 5Pure electromagnetic principle, simple structure, firm and durable, not easy to be damaged. 6Horizontal mount, easy to install, no need complicated tools, save time and effort.
