Spiral wound gasket (SWG) RIR Type, means the gasket only with inner ring . R=Basic Gasket IR=Inner Ring
Spiral wound gasket (SWG) RIR Type, means the gasket only with inner ring .
R=Basic Gasket
IR=Inner Ring
For the inner ring and winding tape are stainless steel (SS304, SS321,SS316)
Or some special Alloy steel. The material of inner ring usually same as winding tape.
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