MFBL-3.5/450 Vertical Shaft Explosion proof Door Function Manufacturer of Vertical Shaft Explosion proof Door

Description :

　　The MFBL-3.5/450 explosion-proof door is used at the wellhead of the vertical air shaft. When the fan stops, it can automatically open the wellhead to protect the mine. The explosion-proof door of this air shaft is composed of explosion-proof cover, return air device, heavy hammer device and other components.

　　MFBL-3.5/450 vertical air shaft explosion-proof door model meaning

　　Model: MFBL-3.5/450;

　　The negative pressure of the fan shall not exceed 350mm

　　Water column wellhead diameter 3500mm

　　MFBL-3.5/450 Explosion proof Door Model and Specifications for Vertical Wind Shaft

　　Explosion proof doors for vertical ventilation shafts are divided into two categories based on the negative pressure of the fan: no more than 350mm water column and no more than 450mm water column. There are three specifications according to the diameter of the wellhead, with a total of six model specifications, as shown in the table below:

　　Structure composition of MFBL-3.5/450 vertical air shaft explosion-proof door

　　1. The explosion-proof cover adopts a conical structure and is connected in four parts, each of which is welded from steel plates and angle steels.

　　2. The return air device is of the pressure plate type.

　　3. The heavy hammer device consists of a heavy hammer frame, pulleys, and counterweights.

　　4. The sealing method adopts steel plate welding outer ring plate fixed with δ 15 rubber plate for sealing.

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AfterSalesService :

• Explosion proof door for vertical ventilation shaft