罐頂通氣孔(TQK-D型) Breather vent Hole
                            
            
罐頂通氣孔裝于重油罐頂部起呼吸作用。
Breather vent pipe series can be set on the heavy oil tank roof for venting
尺寸表 Dimension table:
| 
 DN  | 
 L  | 
 H  | 
| 
 100  | 
 300  | 
 220  | 
| 
 150  | 
 450  | 
 283  | 
| 
 200  | 
 550  | 
 324  | 
| 
 250  | 
 600  | 
 378  | 
| 
 300  | 
 660  | 
 365  | 





