Mine closed doors, underground closed doors, closed the door water 

 I. Introduction 
 Closed the door to the main substation and the main underground drainage pumping station within the channel leading to the shaft bottom, easy to shut down to prevent a sudden immersion in water and can fire. The maximum pressure for the closed door 98KPa. The door closed doors for the flat plate, Tic-Tac-rib, beam welded and other groups. Frame for the channel, I-steel composite frame. Tensioning device is a wedge slider wedge tight. Doors of the rolling bearing support. The key component is the seal. 
 Second, the model specifications 
 Waterproof closed doors there are four specifications. 
 Drawing No. No. Model Specification 
 1 MMB 1.4 × 1.8 B85-373.29 
 2 MMB 1.6 × 1.8 B85-373.30 
 3 MMB 1.8 × 2.0 B85-373.31 
 4 MMB 2.1 × 2.0 B85-373.32 

 Description: 1, strict implementation of Ministry of Coal Industry Design and Research Institute, Wuhan standard coal manufacturing. 

 While the supply of anti-shock valve / closed doors, confined underground waterproof fire doors, fire doors dual fence, fence gate, vertical air shaft explosion-proof doors, blast doors Inclined Well, no pressure dampers, fire doors, water gate, mining Security door. 
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 Products that character customer satisfaction as their responsibility 

 Constant mechanical and electrical products in the mine in Xuzhou Ltd. 
 Address: Xuzhou City, Jiangsu, China University of Mining Technology Park 
 Contact: Manager Wang 
 Mobile: 13852090872 
 E-mail: 13852090872@163.com