Please give some definitions for packing ring types 1 and 2. Thanks.
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In addition, Individual Packing Rings Type 1 and Type 2 packing sets specified as follows:
Style A: Interlaced braided graphite filament or solid 100 lb/ft3 (1600 kg/m3) minimum density compound carbon ring, with corrosion inhibitor. To be used only as end wiper rings in packing combinations.
Style B1: Die-formed flexible graphite with corrosion inhibitor. 70–90 lb/ft3 (1120–1440 kg/m3) nominal die-formed density; used as sealing rings in packing combinations.
Style B2: Die-formed flexible graphite with corrosion inhibitor. 70 lb/ft3 (1120 kg/m3) nominal die-formed density; used as sealing rings in packing combinations.
Style C: Elastomer/plastic packing sealing rings. Material to be specified when making purchase.
Packing Ring Types:
Type 1 packing consists of an all graphite packing ring arrangement.
Type 2 packing consists of an all elastomer or plastic packing ring arrangement (PTFE or PFE, unless otherwise specified).
* Special packing is a packing set for special valves. Special packing requirements should be specified when making purchase.
1.0 ScopeThis specification defines the minimum requirements for design, materials, packing arrangements, and installation and testing requirements for rising-stem and …