Locks : Pipe door locks for pipe wells; fire locks for door equipment used in machine rooms; fire doors for double fan-type doors. The door used for the passage can be fireproof lock, aisle lock or handle. The three types can only be used. It is necessary for the consumers to choose oneself. The lock fittings used together should be indicated in the contract. Door closer : Fire doors other than pipe well doors should be equipped with door closers. Single door device, one door closer, two door devices, two door closers, steel fire doors, the size of the fan (sub-mother door), the fire door only on the large fan equipment door closer. Secondary device : The double doors of the equipment 2 door closers should be equipped with one sequencer. Fireproof latch: Double fire doors with fire locks or aisle locks should be fitted with 2 fireproof latches on the door leaf without lock. (one for each of the door leaf) Spray Wax Gun ,Wax Spray Gun,Cavity Wax Gun NINGBO HENGHUA METAL SURFACE TREATMENT TECHNOLOGY CO.,LTD. , https://www.henghuametal.com
Fireproof hinge : The number of hinges for each door leaf is determined by the height of the door leaf. The door leaf with a door height greater than 1800mm uses 3 hinges, and the door leaf with a door height less than 1800mm uses 2 hinges.