Fisher™ ENVIRO-SEAL™ and HIGH-SEAL
Packing Systems for Sliding-Stem Valves
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Fisher™ FB Fabricated Angle Valves
Fisher FB fabricated angle valves are used with compressible fluids on special applications requiring maximum noise attenuation capability and high capacity. Typical applications include main steam reducing valves and compressor bypass valves. FB valves are also commonly used for sour gas applications in petrochemical and gas processing plants.
Specifications
CertificationsCUTR, PED, CRN, Fugitive Emission, NACECritical ServiceNoise Abatement, Steam Conditioning, OutgassingFlow CharacteristicsLinearMaterialCarbon Steel, Stainless, Duplex, Alloy, Cast IronOperating TemperatureStandard Temperature, High TemperaturePressure ClassASMEProcess Connection TypeFlanged, Butt Weld, RTJShutoff ClassClass II (FCI 70-2), Class III (FCI 70-2), Class IV (FCI 70-2), Class V (FCI 70-2)Valve SizeNPS 8, NPS 10, NPS 12, NPS 14, NPS 16, NPS 18, NPS 20, NPS 24, NPS 30, NPS 36Valve Size StandardNPSOther ConfigurationsContact your local Emerson business partner or sales office to learn about additional specifications or options for this product.
Features
Whisper Trim™ III or WhisperFlo™ cages used in FBD or FBT valves can reduce noise produced by high flow rates and large pressure drops.Regeneration of valve noise is significantly reduced by reducing the outlet flow velocity with an expanded outlet design.The design eliminates gasketing problems caused by thermal expansion and contraction of long parts, such as the cage assembly.The ENVIRO-SEAL™ or HIGH-SEAL packing system options are available. These packing systems provide excellent sealing, guiding, and loading force transmission.A spring-loaded seal ring with PEEK anti-extrusion rings is available on FBT valves for Class V shutoff up to 316°C (600°F). Bore seal is available on FBD valves for Class V shutoff above 316°C (600°F).
