What material type is the valve packing seal 304+GRA?

2016-11-16View Original

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What material type is the valve packing seal 304+GRA?

Reply #22016-11-16

304+GRA: A gasket made of stainless steel 304 combined with flexible graphite strips GRA

Reply #32016-11-16

This post was last edited by ben*aohai1022 on 2016-11-16 15:57. Unit 5: Materials for sealing pairs. When the materials of the sealing surfaces of a sealing pair are different, the code of the material with lower hardness is used to represent it. Example: FZ 944Y is a flanged, fire-resistant electric parallel double-disc gate valve, with cemented carbide sealing. Material Code Material Code Material Code “Tin-based bearing alloy, babbitt” B Cr13 stainless steel H Austenitic stainless steel R Lined C Glued J Plastic S Nitrided steel D Monel alloy M Copper alloy T Fluoroplastic F Nylon plastic N Rubber X Ceramic G Boronized steel P Cemented carbide Y 18-8 series stainless steel E Lead-lined Q Valve body processed directly W Which code should be chosen here? R?

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