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Price Match: Some Exclusions May Apply

PTFE Envelope Tri-Clamp Gaskets with Viton Filler


SKU: A40MPGR-150-V

30 Day Limited Warranty

Made in the USA


Some exclusions may apply.
The following are excluded from this offer:
  • Item(s) that are marked "Ships Separately" on the listing.
  • Hazardous Materials (Alcohols, Lab Chemicals, Butane/Propane, and Cleaning Solvents)
  • Item(s) that BVV™️️️️ recommends ship via Freight (LTL or FTL) due to size/fragility.
  • Large orders and/or combined order weight over 60lbs ship via Freight (LTL or FTL)

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Price Match

Description - Click to Expand

PTFE Envelope Tri-Clamp/Tri-Clover Gaskets with Viton Filler

PTFE Envelope Tri-Clamp Gaskets are the only choice when needing extreme chemical resistance and temperature range. These gaskets are extremely unique in their construction because they have a Viton filler for compressibility surrounded by an 'Envelope' of PTFE which creates a unique combination of chemical resistance while providing an exceptional sealing characteristic. Normal solid PTFE gaskets are very tough to seal on their own and are usually not recommended in vacuum applications due to the gasket being very rigid because PTFE is not very compressible by itself.  Tri-Clamp/ Tri-Clover Sanitary Fittings Gaskets create a pressure-tight seam between multiple stationary components, relying on a compression seal to prevent unwanted gas or liquid emissions.

***Note: Best Value Vacs ONLY recommends the use of PTFE Envelope gaskets with High Pressure clamps to ensure a positive seal on the system.

Key Features:

  • Excellent resistance to almost all chemicals
  • Excellent Temperature Range
  • Excellent Cleanability due to PTFE (Teflon) Envelope
  • No Chemical Leaching

    Sizes Available:

    • 1.5"
    • 2"
    • 3"
    • 4"
    • 6"
    • 8"
    • 10"
    • 12"


    Chemical Compatibility:
    Material PTFE(Teflon)/Viton Filler(FKM)
    Color White/Black
    Connection Type Tri-Clamp
    Conformance U.S.P. CLASS VI COMPLIANCE
    Passes USP Class VI Cytotoxicity Testing and is suitable for high purity pharmaceutical grade applications.
    PTFE is FDA 21, 177,1550 compliant and the FKM(Viton) inner cores are FDA CFR 21, 177.2600 compliant.
    Thermal Properties: Low Temperature Range -100°F
    Minimum Continous Use (Static) -65°F
    Brittle Point -100°F
    High Temperature Range +400°F
    Maximum for Continous Use (Static) +400°F





    Chemical Compatibility:
    Butane A - Excellent
    Propane (liquified) A - Excellent
    Alcohols: Amyl A - Excellent
    Benzyl A - Excellent
    Butyl A - Excellent
    Diacetone A - Excellent
    Ethyl A - Excellent
    Hexyl A - Excellent
    Isobutyl A - Excellent
    Isopropyl A - Excellent
    Methyl A - Excellent
    Octyl A - Excellent
    Propyl A - Excellent


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