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PSI GasketSeal® Sealing and Isolating Gasket

PSI GasketSeal® Sealing and Isolating Gasket

Linebacker Gasket Seal and Isolator

Description

GasketSeal® sealing gaskets are considered to be one of the most effective methods for sealing mating surfaces of all types. The gasket consists of two molded half “O” rings (with precise crown to void ratio) mounted in grooves on opposite sides of a retainer.

While maintaining all the advantages of a full “O” ring seal, the half “O” rings eliminate the need for sealing grooves in the mating surfaces which also eliminates positioning and alignment concerns. GasketSeal® gaskets are available in a wide variety of retainer and sealing element combinations for matching gaskets to service and environmental conditions.

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

Metal
Retainer
Materials		 Insulating
Retainer
Materials		 Sealing
Elements
Aluminum Ceramic Buna-N(Nitrile)
Brass Epoxy Glass Buna-S
Carpenter 20 Glass Butyl
Carbon Steel Lucite EPDM
Cast Iron Melamine Hypolon
Clad Steel Materials Phenolic Kel-F
Copper Polyester Glass Natural Rubbers
Ductile Iron Polyethylene Neoprene
Hastelloy B Polyphenol Ether Nylon
Hastelloy C Pyrox Polimide
Hastelloy X Silicone Glass Polyurethane
Inconel X Vinl Silicone Rubber
Monel Teflon®
Nickel 200 Vinyl
Soft Iron Viton®
Stainless Steel
Tantalum
Tin
Titanium
Vanadium

How The Seal Functions

Before Tightening

The flange faces come into contact with the crown of the sealing elements. As the flange is tightened the crowns are compressed into the molded-in voids in the sealing elements, resulting in a seal that will maintain positive, dynamic contact against the flange faces under all conditions.

 Linebacker Gasket Seal and Isolator

After Tightening

The flange faces have come into firm contact with the retainer, thus encapsulating the sealing elements within grooves and guarding them from exposure to external environments or internal media. At the same time, the elastic memory characteristics of the confined sealing elements results in zero “”m”” and “”y”” factors, making it possible to effect and maintain a positive seal at the lowest possible compressive load.

 Linebacker Gasket Seal and Isolator
Linebacker Gasket Type E Linebacker Gasket Type F
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.

Linebacker Gasket Seal and Isolator

Material Compatibility

Suggested Flange Isolation Material Compatibility

Medium Retainer Seal Temp. Range °F Temp. Range °C
Acetone Phenolic EPDM +32 to +80 0 to +27
Air G-10 Nitrile -65 to +225 -54 to +107
Carbon Dioxide G-10 Nitrile +32 to +150 0 to +66
Ethanol G-10 EPDM +32 to +100 0 to +38
Fuel Oil G-10 Viton -20 to +280 -29 to +138
Gas, Natural Phenolic Nitrile -40 to +220 -40 to +104
Gas, Sour Phenolic Viton -20 to +220 -29 to +104
Hydrogen G-10 Nitrile -40 to +250 -40 to +121
Jet Fuel G-10 Viton -20 to +225 -29 to +107
Nitrogen Phenolic Nitrile -40 to +220 -40 to +104
Oil, Crude G-10 Viton -20 to +280 -29 to +138
Propane G-10 Nitrile or Teflon +32 to +80 0 to +27
Propylene G-10 Viton +32 to +80 0 to +27
Sewage G-10 Viton -20 to +280 -29 to +138
Tolulene G-10 Viton or Teflon +32 to +150 0 to +66
Water (Hot) G-10 EPDM +175 to +280 +79 to +138
Water (Potable) G-10 EPDM +32 to +280 0 to +138
Water (Sea) G-10 EPDM +32 to +280 0 to +138
General Notes:
The foregoing performance data are intended as guidelines only.
Performance suitability for any specific applications should be determined by the user.
Variation in temperature, pressure, concentration or mixtures acting
synergistically may preclude suggested service use.
Material selection is at the sole risk of the user.
Consult with a specialist or PSI factory for specific applications.
PSI’s responsibilities will be limited to those listed
in the PSI standard warranties.
Metal Retainers:
GasketSeal® gaskets are available with a wide
range of metal retainers to offer compatibility with flange metals,
for extremely hazardous fluids or for extremes in
temperatures and pressures.

Seal Element Temperature Limits

Nitrile Vitron® Teflon® Neoprene EPDM
Degrees Farenheit -40 to +250 -20 to +350 Cryogenic to +450 -40 to +175 -65 to +300
Degrees Celsius -40 to +121 -29 to +177 Cryogenic to +232 -40 to +79 -54 to +149
Cryogenic Note:
Consult with a specialist for cryogenic applications and/or extreme temperature variations,
hazardous fluids or for extremes in temperatures and pressures.
Physical Properties of
Common LineBacker® & GasketSeal® Sealing Gaskets
ASTM Test
Method		 Plain
Phenolic		 Rubber
Faced
Phenolic		 G-3 Hi-Temp
Phenolic
Glass		 G-7*
Silicone
Glass		 G-10
Epoxy
Glass		 G-11
Epoxy
Glass
D149 Dielectric Strength
Volts/Mil (Short Term)		 500 500 550 350 – 400 550 550
D695 Compressive Strength
(psi)		 25,000 25,000 50,000 40,000 50,000 50,000+
D229 Water Absorption
(percent)		 1.6 1.6 0.7 0.07 0.10 0.10
D257 Insulating Resistance
Meg Ohms		 40,000 40,000 46,000 2,500 200,000 200,000
D790 Flexural Strength
(psi)		 22,500 22,500 60,000 27,000 60,000 75,000+
D785 Harness
Rockwell “M”		 85 85 115 105 115 115
D256 IZOD Impact Strength
(Ft. Lbs./In.)		 1.2 1.2 112.0 8 14.0 12.0
D638 Tensile Strength
(psi)		 20,000 20,000 42,000 25,000 45,000 43,000
D732 Shear Strength
(psi)		 10,000 10,000 18,000 20,000 22,000 22,000
Temperature Range
Degrees Farenheit		 -65 to +220 -65 to +175 -65 to +392 Cryogenic to +450 Cryogenic to +280 Cryogenic to +349
Temperature Range
Degrees Celsius		 -54 to +104 -54 to +79 -54 to +200 Cryogenic to +232 Cryogenic to +138 Cryogenic to +176
*G-7 Material should not be used with hydrocarbons, not even in trace amounts.

Gasketseal Gasket Seal and Isolator

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: GasketSeal®
  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.

Typical Specifications

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:

Isolating and Sealing Gasket

One full faced isolating and sealing gasket, GasketSeal® Type “E”, 1/8″ thick, phenolic retainer containing a precision tapered groove to accommodate the controlled compression of a nitrile sealing element. Sealing element placement shall accommodate either flat, raised or RTJ face flanges. The 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 isolating 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:

Isolating and Sealing Gasket

One full faced isolating and sealing gasket, GasketSeal® Type “E”, 1/8″ thick, G-10 retainer containing a groove to accommodate the controlled compression of a molded Viton sealing element. Sealing element placement shall accommodate either flat, raised face or RTJ flanges. The seal element 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 isolating 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.

PSI GasketSeal® Sealing and Isolating Gasket

PSI GasketSeal® Sealing and Isolating Gasket

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