Description

LineBacker® sealing gaskets utilize a rectangular sealing element, referred to as a “quad” ring, in combination with a unique groove design to effectively sealflanges of all types. With the unique “quad” ring design, elastic memory is provided for elastomers not normally associated with this characteristic. Materials such as AFLAS, TFE (Teflon) and KALREZ may therefore be used as sealing elements which dramatically increases the options available for matching gasket conditions. This greater variety of materials also provides excellent temperature and chemical range compatibility. LineBacker® sealing gaskets are self energizing with theoretical near zero “m” and “y” factors resulting in effecting a positive seal without excessive bolt loads required with flat gaskets.

Benefits, Features, Sizes, and Ratings

Benefits and Features

• Eliminates Flange Leaks.
• Guards against blowouts.
• Protects against fire and hostile environments.
• Usable with any type of flange.
• Matches gasket materials to service conditions.
• Lowest possible clamp and compressive load.
• Increases gasket life.
• Insulating version is both a positive seal and a superior isolator.

Sizes

• All standard ANSI and API flange sizes from 1/2″ and above.
• Custom odd sizes and shapes.

Pressure Ratings

• All ANSI and API rated flanges.
• Pressures from hard vacuum to 50,000 psi and higher.

Available Options

How The Seal Functions

Before Tightening The flange faces come into contact with the sealing elements, which extend slightly above the surface of the retainer. As the flange is tightened the sealing elements are compressed and move sideways into the inclined portion of the groove, developing a high unit pressure against the flange faces.
After Tightening The flange faces have come into firm contact with the retainer, thus encapsulating the sealing elements within grooves. At the same time, the unique LineBacker® seal configuration provides elastic memory for elastomers not normally associated with this characteristic – resulting in a simple flat gasket with extremely high loading and self energizing characteristics without adverse cold flow problems.
Type E Gasket The gasket retainer extends out to the O.D. of the flange. Holes are cut in a type “E” gasket at the bolt circle to accommodate threaded studs or bolts.	Type F Gasket The gasket retainer extends out to the I.D. of the bolt circle.

How to Order

To order LineBacker® Sealing/Isolating Gaskets please indicate the following:

1. Quantity
2. Nominal Pipe Size
3. Pressure Rating
4. Gasket Type: E or F
5. Gasket Style: LineBacker®
6. Retainer Material
7. Sealing Element
8. Weld neck or slip-on application
9. Note all special requirements.

Warranty

Manufacturer’s warranty statement will be supplied upon request to Allied Corrosion Industries, Inc.

For General Piping Systems

Materials for sealing gaskets on pipes containing water, aqueous fluids or natural gas (up to 221°F, 105°C) shall consist of the following components:

Non-Isolating Sealing Gasket
One full faced sealing gasket, LineBacker® Type “E”, 1/8″ thick, phenolic retainer containing a precision tapered groove to accommodate the controlled compression of a nitrile quad-ring sealing element. Sealing element placement shall accommodate either flat, raised or RTJ face flanges. The quad-ring seal shall be pressure energized. The phenolic retainer shall have a 500 volts/mil dielectric strength and a minimum 25,000 psi compressive strength. The full faced flange gasket shall be 1/8″ less in I.D. than the I.D. of the flange in which it is installed.

Quality
Gaskets shall be manufactured at a facility that has a registered ISO 9001:2000 Quality Management System. Submittals shall include copy of valid registration.

Availability
Gaskets shall be manufactured by Pipeline Seal and Insulator, Inc., Houston, Texas, U.S.A.,
Telephone: 713-747-6948
Facsimile: 713-747-6029
www.pipelineseal.com.
e-mail: info@psipsi.com

Performance suitability and material compatibility shall be determined by the user.

For Top of the Line Piping Systems

Materials for sealing gaskets on pipes containing natural gas, oil and aqueous fluids (up to 280°F, 138°C) shall consist of the following components:

Non-Isolating Sealing Gasket
One full faced sealing gasket, LineBacker® Type “E”, 1/8″ thick, G-10 retainer containing a precision tapered groove to accommodate the controlled compression of a Teflon® (or Viton®) quad-ring sealing element. Sealing element placement shall accommodate either flat, raised face or RTJ flanges. The quad-ring seal shall be pressure energized. The G-10 retainer shall have a 550 volts/mil dielectric strength and a minimum 50,000 psi compressive strength. The full faced flange gasket shall be 1/8″ less in I.D. than the I.D. of the flange in which it is installed.

Quality
Gaskets shall be manufactured at a facility that has a registered ISO 9001:2000 Quality Management System. Submittals shall include copy of valid registration.

Availability
Gaskets shall be manufactured by Pipeline Seal and Insulator, Inc., Houston, Texas, U.S.A.,
Telephone: 713-747-6948
Facsimile: 713-747-6029
www.pipelineseal.com.
e-mail: info@psipsi.com

Performance suitability and material compatibility shall be determined by the user.