The Lifa well blast doors 
 Mine stand air shaft explosion-proof door 

 A purpose 

 Ministry of Coal Industry, Wuhan Institute of Coal Mine Design, established air shaft blast doors design, product quality standards and testing standards to strictly the execution Q/MS-3015-2006 established air shaft explosion-proof door ". Established air shaft blast doors for the establishment of wind wellhead when the fan is switched off, automatically open the wellhead protection mine 

 Fan negative pressure (mm water column) 
 Specifications Model 
 Drawing No. 

 ≤ 350 
 MFBL-3.5/350 
 B78-375.11 

 MFBL-5.0/350 
 B78-375.14 

 MFBL-6.0/350 
 B78-375.16- 

 ≤ 450 
 MFBL-3.5/450 
 B78-375.2 

 MFBL-5.0/450 
 B78-375.5 

 MFBL-6.0/450 
 B78-375.7 

 The main structure of the two products 

 This a ventilating shaft blast doors for explosion-proof cover components of the return air devices, hammer devices. 

 The explosion-proof cover with cone-shaped structure, divided into four parts connected together, each part forming steel, angle steel welding. 

 Three product models, specifications 

 Established air shaft blast doors fan negative pressure are divided into not more than 350mm water column and not more than 450mm water column two categories, three specifications of the wellhead diameter, a total of six model specifications, see Table: 
 Contact person: HUANG Hai-fixed telephone :0537-2608605 
 Mobile: 18,766,872,840: 1,093,569,830. 
 Want: zhongmaojx8899 
 Company Website: http://zhongmeijy001.jdol.com.cn/