Full Lift Safety Valves, API 526, ASTM A351 CF8, DN20, PN25
- Product Name:
- Full Lift Safety Valves
- Design Standard:
- API 526
- Body Material:
- ASTM A351 CF8
- Size:
- DN20
- Pressure:
- PN25
- End Connection:
- BSP Threaded
- Medium:
- Steam, Air
Key Specifications / Features
The China Full Lift Safety Valves Plant manufactures API 526-compliant safety valves with a cast stainless steel body (ASTM A351 CF8) for superior corrosion resistance. These 1-inch (DN25) valves are rated for PN16/Class 150 LB pressure and feature BSP threaded ends for secure connections. Designed for overpressure protection in steam, gas, and liquid systems, they ensure reliable performance in petrochemical, power, and industrial applications.
The A28H type full lift safety valve is designed for use in equipment and pipelines that handle media such as water, air, and steam, where the working temperature is less than 200°C. The A28Y-P/R type safety valve is specifically intended for equipment and pipelines that handle corrosive media, also with a working temperature limit of less than 200°C. These valves are used as additional pressure relief devices to ensure safety and prevent overpressure conditions.
Technical Specification
» Product model: A28H, A28Y
» Normal Size Range: 1/2-3 inch (DN15-DN80)
» Normal Pressure Rating: PN10-PN40, Class 150-300 LB
» Materials: ASTM A216 WCB, A351 CF8, CF8M, CF3, CF3M, Brass, Bronze
» Ends Connections: BSP Thread, NPT Thread
Structural Diagram
Main Parts and Materials
| No | Name of Parts | Carbon steel | Stainless steel | Stainless steel |
| 1 | Nozzle | AISI 1035 | SS 304 | SS 316 |
| 2 | Body | A216 WCB | A351 CF8 | A351 CF8M |
| 3 | Adjusting Ring | 2Cr13 | SS 304 | SS 316 |
| 4 | Disc | 2Cr13 | SS 304 | SS 316 |
| 5 | Spring | 50CrVA | 50CrVA | 50CrVA |
| 6 | Stem | 2Cr13 | SS 304 | SS 316 |
| 7 | Adjusting Bolt | AISI 1045 | 2Cr13 | 2Cr13 |
| 8 | Cap | ZG230-450 | SS 304 | SS 316 |
| 9 | Sealing surface | Overlay stellite | Overlay stellite | Overlay stellite |
