Flanged Safety Valves — Class 150 Through 1500
Large industrial systems requiring robust flange connections for permanent installation benefit from flanged safety relief valves. Aquatrol manufactures flanged designs in carbon steel and stainless steel, rated Class 150 through 1500 per ASME B16.5. Custom sizing, pressure ratings, and specialty materials available—request a quote with your system specifications.
Flanged Relief Valve Applications
Flanged relief valves integrate directly into piping systems with permanent bolted connections, ideal for large-diameter process equipment, power generation, and industrial installations. Flanged design supports high-flow applications up to 6,000 PSIG and eliminates threaded connection torque concerns. Dual or multiple relief configurations are straightforward with flanged design.
Material options include carbon steel for general service, 316L stainless for corrosive environments, duplex and super-duplex for extreme corrosion, and specialty alloys for aggressive chemical or high-temperature applications. ASME Section VIII and API certification available for all flanged configurations.
Custom engineering is standard—special pressure settings, unusual flange sizes, direct-tapped pilot supplies, and integrated pressure reducing combinations are all available. Aquatrol works with OEM and end-user engineers to design flanged relief that meets exact system requirements.
| Series | Pressure Class | Flange Type | Capacity |
|---|---|---|---|
| 55 | 150–600 PSIG | ASME B16.5 | Up to 50,000 CFM |
| 120 | 150–1,500 PSIG | ASME B16.5 | Up to 45,000 CFM |
| 560 | 150–1,000 PSIG | ISO 7241 | Up to 30,000 CFM |
| 747 | 300–1,500 PSIG | ASME B16.5 | Up to 35,000 CFM |
| 748 | 300–1,500 PSIG | Custom | Up to 40,000 CFM |
Common Applications
- Large process vessel and reactor relief
- Power generation and utility equipment protection
- Pipeline and distribution system relief
- Dual or triple relief valve configurations
- Oil and gas production equipment
- Refinery and petrochemical process relief
- Heavy industrial and continuous manufacturing
Need Help Choosing the Right Valve?
Our valve engineers can help you select the perfect valve for your application.