Carbon steel square flap gate valve
 
        
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              flap gate valve Flap Valve stainlesss steel flap valve              
           
                   
       
      
      
        
            
        
              
              
            
            
      
      
  

Installed at the tail end of the drainage pipe, the flap valve has the function of preventing backfilling of external water. The flap valve is mainly composed of four parts: seat, valve plate, water seal ring and hinge. Shapes are divided into circles and squares.
. Drainage measures: Drainage from the original chimney drainage wells, no additional drainage devices

| Material of main parts | |
| Body |                carbon steel | 
| Board |                carbon steel | 
| Hinge |              stainless steel | 
| Bushing |              carbon steel | 
| Pivot Lug |               Carbon steel | 

 
                










