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Safety overflow valve applications
AY42H,HA802Y type safety overflow valves are to be pipelines in high-pressure pump stations to provide over pres-sure protection
Air compressor safety valve brief figure of structure
Safety overflow valve chief property and specification
| Type | Nominal pressure (Mpa) |
Opening Pressure |
Working Temperature |
Suitable Medium |
| AY42H-160 HA802Y-160 |
16.0 | 6.3~16.0 | 200 | Water, Oil goods etc |
| AY42H-250 HA802Y-250 |
25.0 | 10.0~25.0 | ||
| HY42H-400 HA802Y-400 HA802Y-600 |
40.0-60.0 | 20.0~60.0 |
Safety overflow valve materials for main parts
| No. | Name of part | Materials |
| 1 | Body | Carbon Steel |
| 2 | Seat | Stainless steel |
| 3 | Disc | Stainless steel |
| 4 | Bonnet | Welding |
| 5 | Spring | 50CrVA |
Safety overflow valve dimensions (mm)
Type |
Nominal diameter DN(mm) |
Dimension | ||||
| RC | ZG | L | L1 | ≈H | ||
| HA802Y-600 | 15 | 1/2” | 1/2” | 52 | 90 | 250 |
| 25 | 1” | 1” | 52 | 113 | 275 | |
| 40 | 1 1/2” | 1 1/2” | 52 | 157 | 336 | |
Type |
Nominal diameter | Dimension | |||||||||
| D | D1 | K | M | Z-￠d | b | L | L1 | RC | ≈H | ||
| AY42H-160 AY42H-250 AY42H-400 |
15 | 135 | 95 | 25 | M48×2 | 4-22 | 25 | 65 | 140 | 1″ | 329 |
| 20 | 165 | 115 | 30 | M52×2 | 6-26 | 28 | 80 | 150 | 1 1/2″ | 447 | |
| 25 | 200 | 145 | 38 | M80×3 | 6-29 | 40 | 90 | 180 | 2″ | 485 | |
| 32 | 225 | 170 | 42 | M100×3 | 6-33 | 50 | 100 | 200 | 2 1/2″ | 570 | |
