Transcription of Trim Materials - ICEWeb
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Trim Materials - ICEWeb
Sizing & Selection 10. trim Materials Valtek uses 316 stainless steel as standard plug and combination of relative hardness and corrosion resis- seat ring material except in the case of special alloy tance. For corrosion resistance , special alloys such bodies where trims are usually furnished in the same as Alloy 20, Hastelloy C and Monel are also available. material as the body. It is difficult to assign specific A major problem with material selection is deciding limitations to the use of stainless steel because of the when to apply a hard face to protect the control valve insufficient information about the actual condition of the trim . Scientific studies have not adequately predicted flowing stream. However, Valtek applies one general when hard facing should be used.
10-3 Table 10-II: Trim Material Characteristics Trim Hardness Impact Corrosion Recommended Erosion Abrasion Availability Material Rockwell C Strength Resistance Max. Temp. Resistance Resistance
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