Quotation of closed door for mining middling coal closed door quality good closed door supply

Description :

　　Main structure of mining airtight door

　　1) The underground sealed door leaf is made of flat steel plate, cross shaped reinforcement plate, ring beam and other welded components;

　　2) The door frame is composed of channel steel and I-beams in the frame structure;

　　3) The tensioning device is a wedge-shaped slider for clamping;

　　4) The door pivot is supported by rolling bearings.

　　Meaning of Mining Sealing Door Model

　　Model MMB1.4 * 1.8,

　　MMB stands for closed door,

　　1.4 indicates that the net passing width of the entrance (or the net width of the door without a frame) is 1400mm,

　　1.8 indicates that the net passing height of the tunnel entrance (or the net height of the door without replacing the door frame) is 1800mm.

　　Parameters of mining airtight door

　　Waterproof sealing door model and drawing number

　　MB1.4×1.8 B85-373(1)

　　MB1.6×1.8 B85-373(2)

　　MB1.8×2.0 B85-373(3)

　　MB2.1×2.0 B85-373(4) zmjt055

AfterSalesService :

• Mining airtight door