A48C Open Bonnet Plain Lever Type Safety Valve
Full lift safety valve, Standard safety valve for boiler, metal to metal seated, with plain type lifting device, Open bonnet, Flanged connection acc. to ANSI B16.5, Approved for gases, vapours and fluids.
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A48C Open Bonnet Plain Lever Tpye Safety Valve
Safety Valves/pressure safety valves, angle type
Full lift safety valve
Standard safety valve for boiler, open bonnet, metal to metal seated, with plain type lifting device,
Inlet: Flanged connection acc. to ANSI B16.5
Outlet: Flanged connection acc. to ANSI B16.5
Applications
Provided as safety device for protection against excessive pressure in pressure vessels.
Approved for gases, vapours and fluids
Working temperatures: Lower than 300°C
Standards Compliance
Design and Manufacture: API RP 520
Face to Face(end to end): API 526
Test and Inspection: API 527
Main property specifiecation
| Mormal Pressure | PN | 150 | 300 | 600 |
| Body strength | Ps(Mpa) | 3.0 | 7.5 | 15 |
| Set pressure | Pk(Mpa) | 0.1-2 | 1.6-5 | 3.2-10 |
| Seal pressure | Pm(Mpa) | 90%Pk | ||
| Reseation pressure | Ph(Mpa) | ≥90%Pk | ||
| Relieving Pressure | Pp(Mpa) | ≤1.03Pk | ||
| Lift height | H(mm) | ≥1/4 d0 | ||
| Appropriate temp. | ≤300℃ | |||
| Appropriate Medium | Fluids, Steam | |||
Code of throat diameter
| Code | Diameter | Code | Diameter |
| D | 10 | L | 50 |
| E | 13 | M | 55 |
| F | 16 | N | 60 |
| G | 20.5 | P | 72 |
| H | 26 | Q | 96 |
| J | 33 | R | 115 |
| K | 40 | T | 148 |
Materials for main parts
| NO | Name of part | Materials A48Y-C | Materials A48Y-P | Materials A48Y-R |
| 1 | Body | WCB | 304 | 316 |
| 2 | Nozzle | 2Cr13/ 304 | 304 | 316 |
| 3 | Adjusting Ring | 2Cr13/ 304 | 304 | 316 |
| 4 | Disc | 2Cr13/ 304 | 304 | 316 |
| 5 | Guide sleeve | 2Cr13/ 304 | 304 | 316 |
| 6 | Bonnet | ZG230-450 | ZG230-450 | ZG230-450 |
| 7 | Spring | 50CrVA | 50CrVA coated teflon | 50CrVA coated teflon |
| 8 | Stem | 2Cr13 | 304 | 316 |
| 9 | Adjusting bolt | 45 | 2Cr13 | 2Cr13 |
| 10 | Cap | ZG200-400 | ZG200-400 | ZG200-400 |
| Sealing surface of material "Y" depositing stellite | ||||
Essential:
Valves are delivered at a set pressure, therefore when ordering
please confirm set pressure, medium and temperature
TS
Safety accessory and Safety protection device Manufacture License of Special Equipment, People's republic of China
Main Dimensions
Remark: 150Lb for outlet flange
Remark: 150Lb for outlet flange
Remark: 150Lb for outlet flange
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