A21F, A21H-C 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 . A21W-P, 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 forextrapressure protection devices. KA21Y type are used for liquefied petroleum gas what the working temperature are lessthan 100
主要零部件材料 Explanation of materials for main parts
NO.
Name of part
A21H-C/A21F KA21Y-C Materials
A21W-P/A21F-P KA21Y-P Materials
A21Y-RMaterials
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 slite, "H" D507 Depositing D507, "W" body