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 -70degF -Minimum for Continuous Use (Static) -40degF -Brittle Point -70degF -High Temperature Range +210degF to +250degF -Maximum for Continuous Use (Static) +250degF 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.
