Type "E" Gaskets

Type "E" Gaskets extend to the outside diameter of the flange. They feature precision located bolt holes, to automatically center the gasket, and offer maximum protection against foreign material "shorting-out" the flange.

Type "E" gaskets may be ordered in any one of the following configurations:

• LineBacker® Sealing Gaskets
• GasketSeal® Sealing Gaskets
• Neoprene Faced Phenolic Gaskets
• Plain Phenolic Gaskets
• Red Devil Gaskets
• Yellow Jacket Gaskets
• Garlock Gaskets
• Teflon^® Gaskets

When configured as a LineBacker^® sealing gasket, the sealing element may be positioned anywhere between the I.D. of the gasket and I.D. of the bolt circle.

Type "F" Gaskets

Type "F" Gaskets are made to fit within the bolt hole circle of the flange. The O.D. of the gasket extends out to the I.D. of the bolt hole circle for good protection against foreign material "shorting-out" the flange. When configured as a LineBacker^® sealing gasket, the sealing element may be positioned anywhere between the I.D. and O.D. of the gasket. Type "F" gaskets may be ordered in any one of the following configurations:

• LineBacker^® Sealing Gaskets
• GasketSeal^® Sealing Gaskets
• Neoprene Faced Phenolic Gaskets
• Plain Phenolic Gaskets
• Red Devil Gaskets
• Yellow Jacket Gaskets
• Garlock Gaskets
• Teflon^® Gaskets

When configured as a LineBacker^® sealing gasket, the sealing element may be positioned anywhere between the I.D. of the gasket and I.D. of the bolt circle.

Type "D" Gaskets are available for RTJ flanges but the LineBacker^® sealing gasket is an excellent alternative to "D" gaskets because the sealing element may be positioned anywhere between the I.D. of the gasket and I.D. of the ring groove.

GasketSeal^®

GasketSeal sealing gaskets are considered one of the most effective methods for sealing and isolating flanges of all types. The gasket consists of two molded semi "O" rings (with precise crown-to-void ratio) mounted in grooves on opposite sides of an isolating retainer. While maintaining all the advantages of a full "O" ring seal, the semi "O" ring seal eliminates the need for a sealing groove in the flange face to reduce problems associated with alignment. GasketSeal sealing gaskets incorporate near zero "m" and "y" factors that make it possible to effect a positive seal without tremendous bolt loads required with flat gaskets. GasketSeal sealing gaskets are available in a wide variety of retainer and sealing element combinations for matching gaskets to service and environmental conditions. Refer to the chart for the GasketSeal sealing gasket temperature ranges and material compatibilities. More information: PSI GasketSeal Sealing Gaskets

LineBacker^®

LineBacker sealing gaskets utilize a patented rectangular sealing element, referred to as a "quad" ring, in combination with a unique groove design to effectively seal and isolate flanges of all types. With the unique "quad" ring design, elastic memory is provided for elastomers not normally associated with this characteristic. Materials such as polyimide, TFE (Teflon) and vinyl may therefore be used as sealing elements. which dramatically increases the options available for matching gasket materials to service and environmental conditions. This greater variety of materials also provides excellent temperature and chemical range compatibility. LineBacker sealing gaskets incorporate near zero "m" and 'y" factors that make it possible to effect a positive seal without tremendous bolt loads that are required with flat gaskets. Refer to the chart for LineBacker sealing gasket temperature range and material compatibilities. More information: PSI PSI LineBacker Flange Sealing Gaskets and PSI LineBacker™ Zero, 250 & 251 Sealing Gaskets

Neoprene Faced Phenolic

Neoprene Faced Phenolic gaskets have been used as standard "flat" isolating gaskets in the oil and gas industries for many years. Soft neoprene rubber sheets are factory applied to both sides of a laminated phenolic retainer providing an effective sealing surface. The temperature limit of these gaskets is approximately +175° F (80°C). Note: Due to improved sealing characteristics and retainer / seal element options, LineBacker or GasketSeal sealing gaskets should be considered in lieu of neoprene faced phenolic gaskets whenever possible.

Flat Gaskets

Flat Gaskets are used in special applications such as elevated temperatures that often require materials such as Red Devil or Yellow Jacket. Please contact Corrosion Control Products Company for additional information on available options.

Also see PSI Flange Isolation Kits and PSI Isolating Sleeves & Washers.

• Quantity
• Nominal Pipe Size
• ANSI Class
  150#
  300#
  400#
  600#
  900#
  1500#
  2500#
• Gasket Type
  E = With Bolt Holes
  F = Ring (No Bolt Holes)
  D = For RTJ Flanges
• Gasket Style
  GS = GasketSearl
  LB = LineBacker
  NP = Neoprene Faced Phenolic
  PP = Plain Phenolic
  RD = Red Devil
  YJ = Yellow Jacket
  GL = Garlock
  TF = Teflon
• Retainer
  Phenolic
  G-3
  G-7
  G-10
  G-11
• Seal Element
  Neoprene
  Nitrile
  Viton
  EPDM
  Teflon (LB only)
• Washers
  SW = Single Washers
  DW = Double Washers
• Washer Material
  1 PC = 1 Piece Acetal
  Phen = Phenolic
  G-3
  G-7
  G-10
  G-11
• Sleeve
  Poly = Polyethylene
  Mylar
  Nomex
  Phenolic
  G-7
  G-10
  G-11
• Gasket I.D. Flange
• Type
  W = Weld Neck
  S = Slip On
  R = RTJ
  BX = API BX
  RX = API RX
  O = Other (denote Specs and Table)

• Flange I.D.
• Flange O.D.
• Flange Thickness
• Number of Bolts
• Bolt Diameter
• Bolt Hole Diameter
• Bolt Circle Diameter
• Sleeve Length Pipe I.D.
• Steel Sleeve I.D.
  (for concrete pipe)
• Product In Line
• AWWA Class & Table
  (or other similar standard)

For over 40 years, Pipeline Seal and Insulator, Inc. has been a technology leader in the field of high quality sealing and isolating products used to guarantee the safe flow of fluids passing through pipeline transmission, distribution and process piping systems.

An installed base of thousands upon thousands of gaskets and flange isolation kits, effectively sealing and maintaining the integrity of corrosion mitigation programs everywhere, confirms the effectiveness and reliability of the PSI system. In fact, PSI flange isolation products are relied upon for applications subject to the most severe conditions (both internal and environmental), for specialized or exotic fluids or for applications subject to extreme temperature and pressure fluctuations

Flange isolation products include a wide selection of isolating/sealing gaskets along with a variety of sleeves and washers. For maximum flexibility, components may be ordered separately or as part of complete flange isolation kits.

Manufacturing facilities are located in the United States and Europe, with sales and service facilities located worldwide. All PSI facilities are ISO 9001:2000 certified with extensive quality control procedures to insure total compliance with product performance and reliability standards.

Additions to the PSI line of flange isolation products are the LineBacker Zero™ sealing gasket, LineBacker 250™ sealing gasket and LineBacker 251™ sealing gasket, all designed to address problems associated with asbestos substitutes and fugitive emissions. This website section includes suggested flange isolation material compatibility charts as well as technical specifications and an ordering / work sheet.