A27 Spring Micro-Opening Unclosed Safety Relief Valve
A27H type spring micro-opening safety relief valve is suitable for equipment or pipelines with water, air, steam and other media whose working temperature is ≤200℃. A27Y is suitable for equipment or pipelines with corrosive media at working temperature ≤200℃, as an overpressure protection device...
A27H type spring micro-opening safety relief valve is suitable for equipment or pipelines with water, air, steam and other media whose working temperature is ≤200℃. A27Y is suitable for equipment or pipelines with corrosive media at working temperature ≤200℃, as an overpressure protection device.
Material of main parts and components of A27H spring micro-lift safety relief valve:
NO. | Part Name | A27H material | A27W-P material | A27W-R material |
1 | Valve body | HT350 | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
2 | Valve seat | 35 | ZG1Cr18Ni9Ti | ZG1Cr18Ni9Ti |
3 | Adjustment ring | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
4 | Disc | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
5 | spring | 50CrVA | 50CrVA coated fluoroplastic | 50CrVA coated fluoroplastic |
6 | Stem | 2Cr13 | 2Cr13 | 1Cr18Ni9Ti |
7 | Adjusting screw | 45 | 2Cr13 | 1Cr18Ni9Ti |
8 | Protective cover | ZG200-400 | ZG200-400 | 1Cr18Ni9Ti |
Sealing surface material | "H" Surfacing D507 | "Y" surfacing Co-based cemented carbide |
