The 913M is the standard spiral wound gasket with an inner ring. The purpose of this ring is to fill out the space between the flanges, avoiding turbulence in the flow of the fluid or as protection against corrosion or erosion. It is also used as a compression limit. Gaskets with PTFE filler have a tendency to inward buckle thus the use of an inner ring is required by ASME B16.20. Inner rings are also required with ASME standard spiral wound gaskets with flexible graphite fillers unless the purchaser specifies otherwise and some sizes and pressure class require inner rings regardless of filler material.
OD Ring Color
304 Stainless Steel
316L Stainless Steel
317L Stainless Steel
321 Stainless Steel
347 Stainless Steel
Inconel ® 600
HASTELLOY ® B
HASTELLOY ® C
INCOLOY ® 800
Country of Origin Identifier
“y” value (psi)
913 – 913M
Stainless Steel or Monel with Graphite or PTFE filling
Developing A Special Camprofile Gasket For a Pressure Vessel
Style 2007 in Chemical Slurry
A chemical processing facility was having issues maintaining adequate sealing on a slurry pump with their existing packing, requiring retightening every few hours.
Thermic Fluid Case History
Dual Packing Combination Kit in Sugar Industry
2774 and Sealpak® 46
2235 in Steam Application Case History
A chemical processing facility was experiencing steam leakage on a sulphonator vessel after only a couple of weeks of run-time leading to reduced efficiency in the process and longer required run times.
Teadit 24SH in Chemical Processing
A chemical processing facility was experiencing leaks on FRP flange connections due to damage to the flanges caused by the use of gaskets that were not suitable for the requirements of low strength flanges, like FRP.
Teadit Camprofile Gasket in Chemical Processing
A PTFE manufacturing facility was experiencing leaks on an FEP Extruder that was originally designed to utilize a metal reinforced compressed asbestos gasket.
ETP Copper Process Case History
A metal manufacturer was looking for a replacement for asbestos compression packing.
CMS Plant Case History
A chemical plant was having issues with skived virgin PTFE gaskets failing in a heat exchanger application.
2774 Harsh Chemicals Case History
A customer was using a PTFE packing from another manufacture in an auger conveyor system.