A style 911-M gasket is a sealing winding 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 a protection against corrosion or erosion. It is also used as a compression limit when the seating stress is greater than 30,000 psi (210 MPa).
Gaskets with PTFE filler have a tendency to inward buckle thus the use of an inner ring is recommended if the gasket is to be installed with a non-confined inside diameter.
Technical Information
WINDING
Material
O.D. Ring Color
304 Stainless Steel
Yellow
316L Stainless Steel
Green
317L Stainless Steel
Maroon
321 Stainless Steel
Turquoise
347 Stainless Steel
Blue
Monel®
Orange
Nickel
Red
Titanium
Purple
Alloy 20
Black
Inconel®600
Gold
HASTELLOY® B
Brown
HASTELLOY® C
Beige
INCOLOY® 800
White
FILLER
Material
Strip Color
PTFE
White
Flexible Graphite
Gray
Ceramic
Lt. Green
Bolting calculation
“m” value
“y” value (psi)
913 – 913M
3.0
10,000
Stainless Steel or Monel with Graphite or PTFE filling
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.
Teadit 2773 for Wastewater Treatment
A wastewater facility was utilizing a graphite packing in their pumps and experiencing numerous issues (shaft scoring, short run duration, constant retightening, etc.).
Pulp & Paper
A pulp and paper mill was having issues with microcellular PTFE in the liquor lines of their digester process.
Bromine Manufacturing Case History
A chemical processing facility was utilizing PTFE envelope style gaskets on a circulation heater.
