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Product Bulletin ET Valve September 2021 Fisher ET, EAT ...
www.emerson.comWhisper Trim I, Whisper Trim III (figure 7), and WhisperFlo cages (figures 5 and 6) attenuate aerodynamic noise in gaseous service. To help eliminate cavitation damage in a properly-sized valve, a standard-travel, Cavitrol III, one-stage cage (figure 9) and a long-travel, Cavitrol III, two-stage cage are available in the NPS 1
Product Bulletin ES Valve October 2020 Fisher ES and EAS ...
www.emerson.comWhisper Trim I cages (figure 1) that attenuate aerodynamic noise in gaseous service are available for all sizes except the NPS 8 ES valve. Optional constructions provide material compatibility with NACE MR0175-2002. 316 stainless steel packing box parts are standard (including packing flange, studs, and nuts). ES Valve D100021X012 Product Bulletin