API Safety Valves
|
 |
Drawing of setting data
Technical specification
| Design reference |
API RP520 |
| Structural length |
API 526 |
| Flanged ends |
ASME B16.5a |
| Test &inspection |
API527 |
Note: The dimension of connecting flange can be designed according to customers' requirements.
Materials of major parts
|
accessory name |
Sign of Materials |
| C |
C6 |
S |
SM |
SL |
Mc |
M |
H |
| 1 |
Body |
WCB |
WC6 |
CF8 |
CF8M |
CF3M |
WCB |
Monel |
Hast.C |
| 2 |
Seat |
304/316 |
304/316 |
316 |
316L |
316L |
Monel |
Monel |
Hast.C |
| 3 |
Adjust ring |
CF8 |
CF8 |
CF8M |
CF8M |
CF3M |
CF8M |
Monel |
Hast.C |
| 4 |
valves clack |
304 |
304 |
316 |
316L |
316L |
630 |
Monel |
Hast.C |
| 5 |
valves clack holder |
420 |
420 |
630 |
630 |
316L |
316L |
Monel |
Hast.C |
| 6 |
Guide |
304 |
304 |
304 |
316 |
316L |
316 |
Monel |
Hast.C |
| 7 |
Spring seat |
WCB |
WCB |
420 |
420 |
420 |
420 |
420 |
420 |
| 8 |
Spring |
50CrVA |
| 9 |
Stem |
420 |
| 10 |
Bonnet |
WCB |
WC6 |
CF8 |
CF8M |
CF3M |
WCB |
Monel |
Hast.C |
| 11 |
Bellows |
316L |
Monel |
Hast.C |
Performance
The allowable tolerance of the set pressure: = ±3%
Overpressure: = 10%
Blow down: = 10%
Tightness: the valves have good seat tightness, conforms for API 527 |
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