Q: What is the difference between bellows seal valve and expansion joint?
A bellows seal valve uses a metallic bellows to create a zero-leakage seal on the valve stem, preventing fugitive emissions. An expansion joint is a flexible piping component that absorbs thermal expansion, vibration, and movement in piping systems. Both use bellows technology but serve different functions.
Q: What sizes are available for Supreme Valves bellows and expansion joints?
Supreme Valves bellows and expansion joints are available in sizes from 1/4 inch to 12 inch (DN8 to DN300). This covers a wide range of industrial piping applications from small instrument lines to large process pipelines.
Q: What pressure and temperature ranges are supported?
Supreme Valves bellows products support pressure from vacuum to 10000 PSI and temperatures from -196°C (cryogenic) to +600°C. This makes them suitable for cryogenic service, steam systems, high-temperature processes, and high-pressure applications.
Q: What materials are available for bellows construction?
Bellows can be constructed from SS304, SS316L, Inconel 625, Hastelloy, and Titanium depending on the service conditions. Braid is typically SS304 or SS316. Flanges and ends are available in SS304, SS316, WCB, or Alloy steel.
Q: What movement capabilities do expansion joints offer?
Supreme Valves expansion joints offer axial movement (±50mm), lateral movement (±25mm), and angular movement (±15°). They can also be configured for combination movements to accommodate complex piping systems with multiple types of displacement.
Q: What standards do Supreme Valves bellows comply with?
Supreme Valves bellows and expansion joints are designed to EJMA (Expansion Joint Manufacturers Association), ASME B31.3 (Process Piping), and TEMA (Tubular Exchanger Manufacturers Association) standards. Testing includes hydrostatic test, leak test, and cycle test.
Q: What is the design life of Supreme Valves bellows?
Supreme Valves bellows are designed for 1000 to 10000 cycles depending on the specific configuration and operating conditions. The design life varies based on pressure, temperature, movement amplitude, and material selection.
Q: What applications are Supreme Valves bellows suitable for?
Supreme Valves bellows and expansion joints are used in Oil & Gas pipelines, Chemical plants, Power generation, Steam systems, Cryogenic service, HVAC systems, and Marine applications. They absorb thermal expansion, reduce vibration, and compensate for misalignment in piping systems.
