API 520 Safety valve spring loaded-150LB
Description
Safety Relief Valve – Technical Data Sheet (Consolidated)
Document No.: TDS-SRV-API-WCB304
Issue Date: October 27, 2023
The following table consolidates all key technical data for the specified spring-loaded safety relief valve.
| Category | Item | Specification / Value |
|---|---|---|
| Product & Standards | Valve Type | Spring Loaded, Full Lift |
| Design Standard | API 520 (Sizing, Selection & Installation) | |
| Testing & Seat Tightness Std. | API 527 | |
| Primary Specifications | Size & Orifice | As per API 526 (e.g., 2″x3″, Orifice ‘D’) |
| Pressure Rating (Class) | 150, 300, 600 (or PN16/25/40/63) | |
| Set Pressure Range | 10 to 400 PSIG (0.7 to 27.6 BAR) | |
| Operating Temp. Range | -20°C to +300°C (Standard) | |
| Performance | Set Pressure Tolerance | ± 3% |
| Overpressure | ≤ 10% | |
| Blowdown | ≥ 7% (Adjustable) | |
| Seat Tightness | In compliance with API 527 for metal-to-metal seats. | |
| Materials of Construction | Body & Bonnet | WCB (Carbon Steel) |
| Trim (Internal Parts) | 304 Stainless Steel (Incl. Disc, Seat, Guide) | |
| Spring | 50CrVA (Coated) / 304 SS (Optional) | |
| Connections & Testing | Inlet/Outlet Connection | RF Flanged (ASME B16.5) |
| Shell Pressure Test | 1.5 x MAWP | |
| Performance Test | Set Pressure, Pop & Reseat Verification |
