Kunkle Valve Bailey 480/485/490 Relief Valve

The Kunkle Valve Bailey 480/485/490 Series Relief Valves, engineered by Emerson, are high-performance safety and relief valves designed to provide dependable overpressure protection in air, gas, steam, and liquid service applications. Built for versatility, durability, and precision, these valves deliver consistent performance across a wide range of operating conditions, ensuring system safety and compliance with international pressure protection standards. The 480/485/490 Series combines robust design with precision machining to ensure accurate opening and reseating characteristics. Each model within the series is optimized for specific service needs—whether for compressible gases, liquid systems, or steam lines—offering reliable, repeatable operation that minimizes leakage and wear. Constructed from high-quality materials such as brass, stainless steel, and carbon steel, the Kunkle 480/485/490 valves are suitable for demanding industrial environments including boiler systems, compressors, chemical plants, and pressure vessels. Their compact, rugged design simplifies installation and maintenance while ensuring long-term operational reliability.

Technical Specification of Kunkle Valve Bailey 480/485/490 Relief Valve

• Valve Type: Safety and Relief Valve

• Series Models: 480, 485, 490

• Set Pressure Range: 15 to 250 psig (depending on model and configuration)

• Temperature Range: -29°C to 232°C (-20°F to 450°F)

• Body Materials: Brass, Carbon Steel, or Stainless Steel

• Seat Materials: Metal or soft seat options available

• Connections: Threaded (NPT) or flanged per ANSI standards

• Orifice Sizes: Available in multiple orifice diameters for varied flow capacities

• Certifications: ASME Section I, Section VIII, National Board certified

• Spring Materials: Stainless steel for corrosion resistance and long life

• Media Compatibility: Air, steam, gases, and liquids

Feature of Kunkle Valve Bailey 480/485/490 Relief Valve

• Cartridge type assembly which can be withdrawn from the body without disturbing the spring setting, and hence relieving pressure, allows the seating surfaces to be cleaned without the need to reset the valve.
• 480 is a bronze relief valve.
• 485 is bronze with a renewable stainless steel seat and disc.
• 490 is all stainless steel.
• Spindle normally fitted with an ‘O’ ring to protect the spring, particularly on corrosive duties.