Product Bulletin 51.2:HP July 2010
HP Valve
W5952-1 / IL
W6021 1 / IL
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Figure 10. Fisher HPT Trim with Whisper Trim III Level A1 Cage (Available in HPD [NPS 2-6] and HPS [NPS 2 and 3])
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Figure 12. Fisher HPAS Trim with Micro-Flat Valve Plug
C-seal Trim Description C-seal trim is available for HPD valves with port diameters from 2.875 inches through 5.375 inches. With C-seal trim, a balanced valve can achieve high-temperature, Class V shutoff. Because the C-seal plug seal is formed from metal (N07718 nickel alloy) rather than an elastomer, a valve equipped with the C-seal trim can be applied in processes with a fluid temperature of up to 593_C (1100_F).
W5951-1 / IL
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Figure 11. Fisher HPD Trim with Whisper Trim III Level D Cage
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Fisher TSO (Tight Shutoff) Trim Capabilities TSO trim is available for HPS and HPT valves with port diameters as defined in table 5. Also see figure 4 and table 4. TSO trim consists of a protected soft seat plus PEEK anti-extrusion rings with a spring-loaded PTFE plug seal. Used only in flow down applications, TSO trim offers unparalleled shutoff integrity, resulting in longer plug and seat life. For additional information contact your Emerson Process Management sales office.