Application
The A48Y safety valve is suitable for use on equipment or pipelines carrying steam, air, and other media with a working temperature of ≤350°C. It serves as an overpressure protection device. When the pressure inside the equipment or pipeline exceeds the allowable value, the valve automatically opens to fully discharge the pressure. When the pressure drops to the specified value, the valve automatically closes, ensuring the safe operation of the equipment and pipelines.
Main component materials
Serial number | Part name | Material |
1 | Valve body | WCB |
2 | Valve seat | 2Cr13 |
3 | Adjustment ring | ZG2Cr13 |
4 | Backwash disc | ZG2Cr13 |
5 | Valve disc | 2Cr13 |
6 | Guide sleeve | 2Cr13 |
7 | Valve cover | ZG230-450 |
8 | Spring | 50CrVA |
9 | Valve stem | 2Cr13 |
10 | Wrench | ZG200-400 |
11 | Adjustment screw | 45 |
12 | Protective cover | ZG200- 400 |
Sealing surface material | Co-based hard alloy weld overlay |
Main dimensions
Nominal pressure PN(MPa) | Nominal diameter DN(mm) | Dimensions(mm) | |||
d₀ | L | L₁ | DN' | ||
1.6 2.5 4.0 | 20 | 10 | 95 | 85 | 25 |
25 | 15 | 110 | 95 | 32 | |
32 | 20 | 115 | 100 | 40 | |
40 | 25 | 120 | 110 | 50 | |
50 | 32 | 135 | 120 | 65 | |
65 | 40 | 160 | 125 | 80 | |
80 | 50 | 170 | 135 | 100 | |
100 | 65 | 195 | 175 | 125 |
Nominal pressure PN(MPa) | Nominal diameter DN(mm) | Dimensions(mm) | |||
d₀ | L | L₁ | DN' | ||
1.6 2.5 4.0 | 125 | 80 | 210 | 190 | 150 |
150 | 100 | 250 | 210 | 200 | |
200 | 125 | 305 | 260 | 250 | |
250 | 150 | 350 | 320 | 300 | |
300 | 200 | 370 | 350 | 400 | |
350 | 250 | 500 | 450 | 500 | |
400 | 300 | 500 | 450 | 500 | |
500 | 350 | 550 | 500 | 600 |
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