High Capacity Consolidated 1811 1511 Series API Industrial Pressure Cooker Safety Relief Valves for Power Generation Paper

The Consolidated 1811 and 1511 series are ASME-certified spring-loaded safety relief valves for protecting equipment from overpressure in steam, gas, and liquid systems. The 1811 is conventional full-nozzle type, while 1511 provides balanced bellows or high-performance options. They are trusted in critical applications for repeatable pop action and tight shut-off.

• Full-nozzle construction for high flow capacity
• Adjustable blowdown for precise control
• Balanced bellows in 1511 – handles variable backpressure
• Metal-to-metal or soft-seated trim
• Open bonnet for high-temperature service
• Robust spring and disc design
• Certified for multiple media types

• Orifice Sizes: D to Q (API 526)
• Inlet/Outlet Sizes: ½" D 2" to 6" Q 8" typical
• Set Pressure: 15 to 6000 psig
• Temperature Range: –423 °F to +1000 °F
• Body Materials: Carbon steel, stainless steel, chrome-moly
• Disc/Seat: Stainless steel, Stellite facing
• Leakage: API 527 tight seating
• Certification: ASME Section VIII, API 526/527

• Steam drum and superheater relief
• Pressure vessel overpressure protection
• Gas compressor discharge safety
• Refinery and chemical process safety

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