Deskripsi
Power Station Safety Valve
Model : SFA-48SC1500C 4M6, 1500×300LB
Brand : Shanghai Valve Factory
Product Overview
The SFA-48SC1500C 4M6 is a spring-loaded full-lift safety valve designed for overpressure protection in power station steam systems. It automatically opens when system pressure exceeds the set limit and reseats once pressure normalizes. The valve is built for Class 300 (PN50) pressure systems and is suitable for superheated steam, saturated steam, and water.
- Type: Full-lift safety valve
- Model: SFA-48SC1500C 4M6
- Connection: Flanged (ANSI 300LB)
- Function: Overpressure protection for pressurized vessels and pipelines
- Design Standard: GB12243-2007 / ASME Section VIII
Detailed Specifications
| Parameter | Value |
|---|---|
| Nominal Size | 1500 (likely refers to orifice area or model series) |
| Pressure Class | ANSI 300LB (PN50) |
| Set Pressure Range | Up to 50 bar (adjustable) |
| Temperature Range | ≤400°C |
| Lift Type | Full lift (≥1/4 flow channel diameter) |
| Operation | Spring-loaded automatic |
| Medium Compatibility | Saturated steam, superheated steam, water |
| Closing Pressure Ratio | ~0.85 (typical for full-lift valves) |
Material List
| Component | Material |
|---|---|
| Body / Bonnet | WCB (Cast Carbon Steel) |
| Disc | SS304 / SS316 / 2Cr13 |
| Seat Ring | SS304 / Stellite overlay |
| Spring | 50CrVA (high-strength alloy) |
| Stem | SS304 / SS316 |
| Gasket | Graphite + SS304 spiral wound |
| Cover | Carbon Steel (closed type) |
| Fasteners | Carbon Steel / Stainless Steel |
The closed bonnet design helps prevent ingress of dust and escape of hazardous media, while the Stellite hard-facing ensures durability under high-temperature cycling.
Dimensions (Estimated for 1500×300LB)
| Dimension | Value (mm) |
|---|---|
| Face-to-Face (L) | ~450–550 |
| Flange OD (D) | ~360–410 |
| Bolt Circle (D1) | ~320–355 |
| Bore (D2) | ~150–180 |
| Bolt Holes | 8–12 × φ26–30 |
| Overall Height (H) | ~850–1000 |
| Weight | ~95–120 kg |
Exact dimensions may vary depending on trim and configuration. These estimates are based on ANSI 300LB flanged safety valves in the DN100–DN150 range.
Application Areas
This valve is engineered for:
- Thermal power stations
- Steam turbines and boilers
- Superheated steam pipelines
- Pressure vessels and heat exchangers
- High-pressure water systems
- Industrial steam distribution networks
Its full-lift design ensures rapid discharge capacity, making it ideal for critical overpressure protection in high-energy systems.
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