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A41 Closed Spring Loaded Low Lift Type High Pressure Safety Valve
Closed Spring Loaded Low Lift Type High Pressure Safety Valve
A21F, A21HC type are used for the equipment and pipeline of the air, ammonia, petroleum gas, etc. medium what the wor-king temperature are less than 200 . A21WP, R type are used for the equipment and pipeline of the quality with corr ode gas and liquid medium shat the wor-king temperature are less than 200 . Take for extrapressure protection devices. KA21Y type are used for liquefied petroleum gas what the working temperature are less than 100
Explanation of materials for main parts
NO. |
Name of part |
A21H-C/A21F KA21Y-C Materials |
A21W-P/A21F-P KA21Y-P Materials |
A21Y-R Materials |
1 |
Union |
20 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
2 |
Union nut |
35 |
2Cr13 |
1Cr18Ni9Ti |
3 |
Nozzle |
35 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
4 |
Body |
2Cr13 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
5 |
Disc |
2Cr13/2Cr13+PTFE |
1Cr18Ni9Ti/1Cr18nI9Ti+PTFE |
1Cr18Ni12Mo2Ti |
6 |
Spring washer |
2Cr13 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
7 |
Spring |
50CrVA |
50CrVA Coated Teflon |
50CrVA Coated Teflon |
8 |
Locking nut |
Q235-A |
2Cr13 |
1Cr18Ni9Ti |
9 |
Spring guide |
2Cr13 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
10 |
Adjusting nut |
Q235-A |
2Cr13 |
1Cr18Ni12Mo2Ti |
Sealing surface of material |
"Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body |
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