Specification
| Product model | Description |
| BJFMXI | Applicable to bottom hole diameter, applicable to valve stem diameter (hand wheel diameter): maximum22mm |
| BJFMX2 | Applicable to bottom hole diameter, applicable to valve stem diameter (hand wheel diameter): between 23mm and 34mm |
| BJFMX3 | Applicable to bottom hole diameter, applicable to valve stem diameter [hand wheel diameter): between 44mm-52mm |
| BJFMX4 | Applicable to bottom hole diameter, applicable to valve stem diameter (hand wheel diameter): between 55mm-62mm |