BUNA-N Tri-Clamp Gaskets (Made in USA, FDA Compliant / Meets 3A Standards)


BUNA-N Tri-Clamp Gaskets

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; the best part is that they cost less 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.
  • FDA CFR 177.2600 – Rubber and Rubber-Like Material for Repeated Use/Contact with Food.
  • FDA CFR 177.1550 – Fluorocarbon Resins for Repeated Use/Contact With Food, Dairy & Pharmaceutical Products.

Sizes Available:

  • 1.5"
  • 2"
  • 3"
  • 4"
  • 6"
  • 8" - easy on flanged
  • 10" - easy on flanged
  • 12" - easy on flanged


Technical Specifications:
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 Continuous Use (Static) -40°F
-Brittle Point -70°F
-High Temperature Range +210°F to +250°F
-Maximum for Continuous 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
Thread Style Female

Chemical Compatibility:
Butane A - Excellent
Propane (liquified) A - Excellent
Alcohols: -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
-Isopropyl B - Good
-Methyl A - Excellent
-Octyl B - Good
-Propyl A - Excellent


No more than a -40 F operating temperature should be used with BUNA-N.

BVV is not responsible if incompatible chemicals, solvents, or operating temperatures are used in the user's system.

BUNA-N Tri-Clamp Gaskets (Made in USA, FDA Compliant / Meets 3A Standards)

Product form

SKU: 40MPU-150

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    BUNA-N Tri-Clamp Gaskets Shop Brands BVV 1.5-inch

    BUNA-N Tri-Clamp Gaskets (Made in USA, FDA Compliant / Meets 3A Standards)

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