[ Threaded safety valve]--External thread safety valve product overview
The external threaded safety valve A21F, A21H-C is suitable for equipment or pipelines with media such as air, ammonia, petroleum gas, etc. whose working temperature is ≤200℃. Type A21W-P and R are suitable for equipment or pipelines with corrosive gas or liquid at a temperature of ≤200℃. The external threaded safety valve is used as an overpressure protection device. KA21Y type is suitable for liquefied petroleum gas whose temperature is ≤100℃.
Srew end safety valve part material:
NO. | PART | A21H-C/A21F Material | A21W-P/A21F-P Material | A21Y-R Material |
1 | Pipe joint | 20 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
2 | Pipe joint nut | 35 | 2Cr13 | 1Cr18Ni9Ti |
3 | Seat | 35 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
4 | Body | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
5 | Disc | 2Cr13/2Cr13+PTFE | 1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE | 1Cr18Ni12Mo2Ti |
6 | Spring seat | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
7 | Spring | 50CrVA | 50CrVA包覆氟塑料 | 50CrVA包覆氟塑料 |
8 | Lock nut | Q235-A | ZG230-450 | 1Cr18Ni9Ti |
9 | Spring Guide | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
10 | Adjust Nut | Q235-A | 2Cr13 | 1Cr18Ni12Mo2Ti |
| Sealing Material | "Y"型堆焊Co基硬质合金,"H"型堆焊D507,"W"型为阀门本体 |
Screw End Safty valve Dimensions:
Type | Size | do | d | Do | M | d1 | D1 | L | L1 | ≈H |
KA21-16C
A21H-16C
A21H-40
A21W-16P
A21W-40P
KA21-16P | 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
A21Y-64P
A21Y-100
A21Y-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 |
