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A27H弹簧微启式安全阀是一种安全保护用阀，它的启闭件受外力作用下处于常闭状态，当设备或管道内的介质压力升高，超过规定值时自动开启，通过向系统外排放介质来防止管道或设备内介质压力超过规定数值。安全阀属于自动阀类，主要用于锅炉、压力容器和管道上，控制压力不超过规定值，对人身安全和设备运行起重要保护作用。
 A27H-10 A27H-16 A27H-25 A27H-40 A27Y-10P A27Y-16P A27Y-25P A27Y-40P A27Y-10R A27Y-16R A27Y-25R A27Y-40R |
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| A27H型适用于工作温度≤200℃的水、空气、蒸气等介质的设备或管路上。A27Y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。 | ||||
| A27H type are used for the equipment and pipeline of water, air, steam etc. medium what the working temperature are less than 200 . A27Y type are used for the equipment and pipeline of the quality with corrode me-dium what the working tempe-rature are less than 200 . Take for extra pressure devices. | ||||
| 主要零部件材料Explanation of materials for main parts | ||||
| NO. | Name of part | A27H Materials | A27W-P Materials | A27W-R Materials |
| 1 | Body | HT350 | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
| 2 | Nozzle | 35 | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
| 3 | Adjusting ring | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 4 | Disc | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 5 | Spring | 50CrVA | 50CrVACoated Teflon | 50CrVACoated Teflon |
| 6 | Stem | 2Cr13 | 2Cr13 | 1Cr18Ni9Ti |
| 7 | Adjusting bolt | 45 | 2Cr13 | 1Cr18Ni9Ti |
| 8 | Cap | ZG200-400 | ZG200-400 | 1Cr18Ni9Ti |
| Sealing surface of material | D507 Depositing D507 | CoDepositing stellite | ||
| 10 | Adjusting nut | Q235-A | 2Cr13 | 1Cr18Ni12Mo2Ti |
| Sealing surface of material | "Y" CoDepositing 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 | L | L1 | G | H | |
| 15 | 10 | 1/2" | 40 | 65 | 1/2" | 135 |
| 20 | 15 | 3/4" | 45 | 70 | 3/4" | 140 |
| 25 | 20 | 1" | 45 | 76 | 1" | 155 |
| 32 | 25 | 11/ " | 55 | 85 | 11/ " | 170 |
| 40 | 32 | 11/ " | 55 | 85 | 11/ " | 310 |
| 50 | 40 | 2" | 67 | 100 | 2" | 322 |
| 65 | 50 | 21/ " | 76 | 112 | 21/ " | 344 |
| 80 | 65 | 3" | 110 | 135 | 3" | 395 |
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