| Type | WP(Mpa） | DN(mm） | Medium | Outlet thread | Inlet thread | Safety device | Frame madality |
| YF-2 | 3 | Φ4 | C2H2 | Φ21夹箍Clamp | PZ39 | 100±5℃ | Needle type |
| YF-2A | 3 | Φ4 | C2H2 | Φ21夹箍Clamp | 1-11 1/2NGT | 100±5℃ | Needle type |
| YF-2B | 3 | Φ4 | C2H2 | Φ21夹箍Clamp | PZ27.8 | NO | Needle type |
| Type | WP(Mpa） | DN(mm） | Medium | Outlet thread | Inlet thread | Safety device | Frame madality |
| YF-2 | 3 | Φ4 | C2H2 | Φ21夹箍Clamp | PZ39 | 100±5℃ | Needle type |
| YF-2A | 3 | Φ4 | C2H2 | Φ21夹箍Clamp | 1-11 1/2NGT | 100±5℃ | Needle type |
| YF-2B | 3 | Φ4 | C2H2 | Φ21夹箍Clamp | PZ27.8 | NO | Needle type |
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