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A21H Spring Low Lift Thread Safety Valve:
Descriptions:
1.A21F, A21H-C type are used for the equipment or pipeline of the air, ammonia, petroleum gas, etc. medium whose working temperature are less than 200 °C.
2.A21W-P, R type are used for the equipment or pipeline of some corrosive medium whose working temperature are less than 200 °C, as the overpressure protection device.
3.KA21Y type are used for liquefied petroleum gas whose working temperature are less than 100°C.
Materials of main parts:
No. | Name of part | Material | ||
A21H-C/A21F KA21Y-C | A21W-P/A21F-P KA21Y-P | A21Y-R | ||
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 | |||
Dimensions (mm)
Model | DN | do | d | Do | M | d1 | D1 | L | L1 | ≈H |
KA21-16C,16PA21H-16C,40A21W-16P,40P | 15 | 12 | 15 | 20 | M27×1.5 | G1/2" | 30 | 35 | 76 | 66 |
20 | 16 | 20 | 25 | M33×1.5 | G3/4" | 35 | 40 | 87 | 68 | |
25 | 18 | 25 | 31 | M39×1.5 | G1" | 40 | 50 | 100 | 105 | |
A21Y-64,64P,100,100P | 15 | 10 | 15 | 25 | M39×1.5 | G1" | 44 | 50 | 100 | 66 |
20 | 10 | 20 | 31 | M39×1.5 | G1" | 44 | 50 | 100 | 68 | |
25 | 12 | 25 | 31 | M39×1.5 | G1" | 44 | 50 | 100 | 105 | |
A21W-160,160P | 15 | 8 | 20 | / | M24×2 | G1" | 44 | 50 | 100 | 261 |
20 | 8 | 25 | / | M33×2 | G1" | 44 | 50 | 100 | 261 | |
25 | 8 | 28 | / | M36×2 | G1" | 44 | 50 | 100 | 285 |
A21H Spring Low Lift Thread Safety Valve