BUNA-N Tri-Clamp Gaskets

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  • Regular price $1.50

Buna-N Tri-Clamp gaskets are the preferred choice of material when using a closed loop, closed column, or open blast extraction when butane or propane are used as the extraction solvent. Buna-N Gaskets offer a lower temperature rating and have better physical properties than Viton gaskets and the best part is that they are also cheaper than Viton and provide the same chemical resistance to butane and propane. 

***Note: Buna-N is not recommended for use with certain alcohols.

Key Features:

  • Lower Temperature Range
  • Lower Costs
  • Better Compressibility and Springiness
  • Excellent Resistance to Butane and Propane
  • Better Tear Resistance
  • Better Abrasion Resistance

Sizes Available:

  • 1.5"
  • 2"
  • 3"
  • 4"
  • 6"
  • 8" - Easy On Flanged
  • 10" - Easy On Flanged
  • 12" - Easy On Flanged


Material BUNA-N (Nitrile)
Color Black
Connection Type Tri-Clamp
Conformance FDA Compliant / Meets 3A Standards
Thermal Properties:  
   -Low Temperature Range -70°F
   -Minimum for Continous Use (Static) -40°F
   -Brittle Point -70°F
   -High Temperature Range +210°F to +250°F
   -Maximum for Continous Use (Static) +250°F
Gas Permeability Excellent
Durometer or Hardness Range 65 Shore A
Tensile Strength Range 200-3500PSI
Elongation Range (%) 350-650%
Abrasion Resistance Excellent
Tear Resistance Excellent
Resilience / Rebound Good

Chemical Compatibility:

Butane A - Excellent
Propane (liquified) A - Excellent
-Amyl B - Good
-Benzyl D - Severe Effect
-Butyl C - Fair
-Diacetone D - Severe Effect
-Ethyl C - Fair
-Hexyl A - Excellent
-Isobutyl B - Good
-Isopropyl B - Good
-Methyl A - Excellent
-Octyl B - Good
-Propyl A - Excellent


Disclaimer: Best Value Vacs Recommends no more than a -40F Operating Temperature and is not responsible for the user running their system with incompatible chemicals.