Consolidated 1511 1811 Series Safety Valves High Pressure Safety Valve 1/2 3/4 APS Flange Supplier for Power Boilers

The Consolidated 1811 and 1511 are direct spring-loaded safety relief valves designed for overpressure protection in steam, gas, and liquid services. The 1811 is a conventional full-nozzle valve, while 1511 is a balanced bellows or special configuration. They are ASME-certified and widely used in power plants, refineries, and industrial processes for reliable pop action and tight seating.

• Full-nozzle design for high capacity and stability
• Adjustable blowdown ring for performance tuning
• Balanced bellows option (1511) – reduces backpressure effects
• Open or closed bonnet configurations
• Multiple trim materials for corrosion resistance
• High-temperature capability for steam service
• Certified for gas, liquid, and steam relief

• Orifice Sizes: D to Q (API 526 standard)
• Inlet Sizes: ½" to 6"
• Outlet Sizes: 1" to 8"
• Set Pressure Range: 15 to 6000 psig (1 to 414 bar)
• Temperature Range: –423 °F to +1000 °F (–253 °C to +538 °C) depending on materials
• Body Materials: Carbon steel, stainless steel, alloy steel
• Disc/Seat: Stainless steel, Stellite hard-faced
• Leakage: API 527 certified tight seating
• Certification: ASME Section VIII, API 526/527

• Boiler drum and superheater overpressure protection
• Pressure vessel safety relief
• Steam and gas system protection
• Refinery and petrochemical process lines

Q: What is the main difference between 1811 and 1511? A: 1811 is conventional design, 1511 often includes balanced bellows or special features.

Q: Suitable for high-temperature steam? A: Yes – with proper materials up to +1000 °F.

Email: edwardzhao@gbsxj.com

Phone/WeChat/WhatsApp: +8615000725058

• Consolidated 1900 series (smaller orifices)
• Consolidated 1700 / 2700 / 3700 series
• Consolidated pilot-operated relief valves