GRAPHITE GASKETS

GRAPHITE GASKETS
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GRAPH-LOCK® is composed of pure, exfoliated flake material. It excels in extreme conditions and withstands high temperatures, high pressures, and aggressive chemicals. It also provides excellent resistance and is proven to be fire-safe.

GRAPH-LOCK® gasketing provides a reliable seal as it seals easily under moderate bolt load, offers superior torque retention, retains dimensional stability in high temperatures and seals tightly, even during pressure fluctuations. Flexible graphite is manufactured in such a manner that no organic or inorganic binders and fillers are introduced — the end product is essentially pure graphite with outstanding physical properties. The insertion of wire mesh, stainless steel foil, and tanged metal inserts increase strength and ease of handling.

GRAPH-LOCK® gasketing is available in two grades: industrial grade, which is 98% pure, and nuclear grade, which is 99.5% pure. It is available as standard homogeneous sheet or metal- inserted sheet for applications requiring extra strength.

GRAPH-LOCK® 3123 / 3125
  • ABOUT
  • FEATURES AND BENEFITS
  • SPECIFICATIONS

Purified graphite sheet flexible graphite gasketing

The graphite flake has been acid washed, expanded under heat, and then compressed into sheets with a minimum graphite content of 98%. For thicknesses under 1/16” homogenous graphite is used. For thicknesses over 1/16” laminated graphite is used. The laminated graphite sheets are bonded with a proprietary adhesive. This adhesive makes up less than 1% of the total laminated weight.

  • Excellent resistance
  • Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure and aggressive chemicals
  • Proven fire-safe
  • Reliable
  • Seals easily under moderate bolt load, offers superior torque retention
  • Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
  •  
  • Available in cut sheet or cut gasket form
  • Min. Temperature:            -400°F     /       -240°C
  • Max. Temperature:            850°F     /       454°C
  • Max. Pressure:            2,000 PSI       /     138 bar
  • Maximum PxT 1/16:        700,000 (°F x PSIG)  /  25,000 bar x °C
  • Maximum PxT 1/8:            350,000 (°F x PSIG)  /  12,000 bar x °C
  •  
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GRAPH-LOCK® 3124 / 3126
  • ABOUT
  • FEATURES AND BENEFITS
  • SPECIFICATIONS

Laminated graphite sheet with a 316SS wire mesh insert

GRAPH-LOCK® 3124 and 3126 feature laminated layers of purified natural graphite flake that have been acid washed, expanded under heat, and then compressed into sheets with a minimum graphite content of 98%. This sheet contains a 0.0075” thick - JC thick 316 stainless steel wire mesh (24 mesh) insert, bonded with a proprietary adhesive. This adhesive makes up less than 1% of the total laminated weight. 

  • Excellent resistance
  • Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
  • Proven fire-safe
  • Reliable
  • Seals easily under moderate bolt load, offers superior torque retention
  • Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
  •  
  • Available in sheet or cut gasket forms
  • Min. Temperature:            -400°F     /       -240°C
  • Max. Temperature:            850°F     /       454°C
  • Max. Pressure:            2,000 PSI       /     138 bar
  • Maximum PxT 1/16:        700,000 (°F x PSIG)  /  25,000 bar x °C
  • Maximum PxT 1/8:            350,000 (°F x PSIG) /   12,000 bar x °C
  •  
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GRAPH-LOCK® 3128 HOCHDRUCK®
  • ABOUT
  • FEATURES AND BENEFITS
  • SPECIFICATIONS
Multi-layer graphite with 316SS inserts
GRAPH-LOCK® 3128 HOCHDRUCK® is a multi-layer, high strength sheet material composed of .020” thick layers of high purity flexible graphite (carbon >99.85%) and .002” thick layers of 316 stainless steel foil insert. It provides high compressive strength, blow-out resistance, excellent handling properties, and improved tightness. Depending on the sheet thickness, several layers of graphite and stainless steel are bonded together in a proprietary process; no adhesive is used. Maximum ash content is 0.15%.
  • Excellent resistance
  • Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
  • Proven fire-safe
  • Reliable
  • Seals easily under moderate bolt load, offers superior torque retention
  • Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
  •  
  • Available in sheet or cut gasket form
  • Min. Temperature:            -400°F      /      -240°C
  • Max. Temperature:            850°F     /       454°C
  • Max. Pressure:            2,000 PSI       /     138 bar
  • Maximum PxT 1/16:        700,000 (°F x PSIG)  /  25,000 bar x °C
  • Maximum PxT 1/8:            350,000 (°F x PSIG)  /  12,000 bar x °C
  •  
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GRAPH-LOCK® 3125SS
  • ABOUT
  • FEATURES AND BENEFITS
  • SPECIFICATIONS
Laminated graphite sheet with a 3125SS foil insert

GRAPH-LOCK® 3125SS has laminated layers of 0.015" purified natural graphite flake that have been acid washed, expanded under heat and then compressed into sheets with a minimum graphite content of 98%. This sheet contains a 0.002” thick 316 stainless steel foil insert, bonded with a proprietary adhesive. This adhesive makes up less than 1% of the total laminated weight.

  • Excellent resistance
  • Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
  • Proven fire-safe
  • Reliable
  • Seals easily under moderate bolt load, offers superior torque retention
  • Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
  •  
  • Available in sheet and cut gasket form
  • Min. Temperature:            -400°F      /      -240°C
  • Max. Temperature:            850°F      /      454°C
  • Max. Pressure:            2,000 PSI       /     138 bar
  • Maximum PxT 1/16:        700,000 (°F x PSIG)  /  25,000 bar x °C
  • Maximum PxT 1/8:            350,000 (°F x PSIG) /   12,000 bar x °C
  •  
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GRAPH-LOCK® 3125TC
  • ABOUT
  • FEATURES AND BENEFITS
  • SPECIFICATIONS
Mechanically bonded graphite sheet with a 316SS tang insert
Purified natural graphite flake that have been acid washed, expanded under heat, and then compressed into sheets with a minimum graphite content of 98%. The graphite is mechanically bonded to a 0.004” thick 316 stainless steel tang insert (53 tangs/sq in.). 
  • Excellent resistance
  • Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
  • Proven fire-safe
  • Reliable
  • Seals easily under moderate bolt load, offers superior torque retention
  • Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
  •  
  • Available in sheet and cut gasket form
  • Min. Temperature:            -400°F       /     -240°C
  • Max. Temperature:            850°F       /     454°C
  • Max. Pressure:            2,000 PSI        /    138 bar
  • Maximum PxT 1/16:        700,000 (°F x PSIG)  /  25,000 bar x °C
  • Maximum PxT 1/8:            350,000 (°F x PSIG)  /  12,000 bar x °C
  •  
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