A28H型安全阀适用于工作温度≤200℃的空气、蒸汽、水、氮氢混合气等介质的设备或管路上，A28Y-P/10R8安全阀适用于工作温度≤200℃有腐蚀性介质的设备或管路上，作为超压保护装置。
Series
A28H-10 A28Y-10P A28Y-10R8
A28Y-25R8 A28Y-40R8 A28H-16 A28Y-16P A28Y-16R8 A28Y-25R8 A28Y-40R8
| 主要零部件材料 Explanation of
materials for main parts |
| NO. | Name of
part | A28H
Materials | A28Y-P
Materials | A28Y-R8 Materials |
| 1 | Body | HT200 | ZG1Cr18Ni9Ti | CF8M |
| 2 | Nozzle | 35 | ZG1Cr18Ni9Ti | CF8M |
| 3 | Adjusting ring | 2Cr13 | 1Cr18Ni9Ti | 316 |
| 4 | Disc | 2Cr13 | 1Cr18Ni9Ti | 316 |
| 5 | Spring | 50CrVA | 50CrVA Coated
Teflon | 50CrVA Coated
Teflon |
| 6 | Stem | 2Cr13 | 2Cr13 | 316 |
| 7 | Adjusting bolt | 45 | 2Cr13 | 316 |
| 8 | Cap | ZG200-400 | ZG200-400 | CF8M |
| | Sealing surface of
material | D507
Depositing
D507 | Co
Depositing stellite |
| 10 | Adjusting nut | Q235-A | 2Cr13 | 1Cr18Ni12Mo2Ti |
| | Sealing surface of material | "Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body |
| 外形尺寸和连接尺寸 Dimensions
(mm) |
Nominal diameter
DN (mm) | Dimensions (mm) |
| do | Rc | G | L | L1 | H |
| 15 | 10 | 1/2" | 3/4" | 37 | 62 | 189 |
| 20 | 12 | 3/4" | 1" | 40 | 65 | 196 |
| 25 | 15 | 1" | 11/ "
4 | 45 | 72 | 277 |
| 32 | 20 | 11/ " | 1 | 55 | 85 | 312 |
| 40 | 25 | 11/ " | 2" | 67 | 100 | 322 |
| 50 | 32 | 2" | 21/ "
2 | 76 | 112 | 348 |
| 65 | 40 | 21/ " | 3" | 110 | 135 | 370 |
| 80 | 50 | 3" | 4" | 110 | 145 | 410 |
