適用標準
鋼制止回閥，API 594/API 6D，ISO 14313
溫度和壓力，ASME B16.34
結構長度，ASME B 16.10
端法蘭， ASME B 16.5
試驗標準，API 598
設計說明
單片閥體
蝶形雙瓣旋啟式
對夾或法蘭連接
水平或垂直安裝
標準材料規范
| No | Part Name | ASTM Material | |||||||
| Carbon Steel | 1.25Cr-0.5Mo | 2.25Cr- 1Mo | 304 Type | 316 Type | 304L Type | 316L Type | 20 Alloy | ||
| 1 | Body | A216WCB | A217 WC6 | A217WC9 | A351CF8 | A351 CF8M | A351CF3 | A351 CF3M | A351 CN7M |
| 2 | Plate | WCB+ 13Cr *1 | A217 WC6+HF | A217 WC9+H F | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | A351 CN7M |
| 3 | Stop Pin | A276 410 | A276 410 | A276 410 | A276 304 | A276 316 | A276 304L | A276 316L | 20-Alloy |
| 4 | Back Spring | Si-Mn steel | Cr-V Steel | Cr-V Steel | A313 304 | A313 316 | Inconel 750 | Inconel 750 | Incone 1750 |
| 5 | Hinge Pin | A276 410 | A276 410 | A276 410 | A276 304 | A276 316 | A276 304L | A276 316L | 20-Alloy |
| 6 | Eyebolt | Carbon Steel | Carbon Steel | Carbon Steel | Carbon Steel+Zn | Carbon Steel+Zn | Carbon Steel+Zn | Carbon Steel+Zn | Carbon Steel+Zn |
| Seat Face | 13Cr*1 | HF | HF | NA | NA | NA | NA | NA | |
| *1 | PN≥600Class seal face will be HF | ||||||||
| Na | Intergral with vessell | ||||||||
