PTFE Bonded EPDM Gasket (1330 Style)

PTFE Bonded EPDM Gasket (1330 Style)

Core Features

  • Advanced Dual-Material Fusion: Features a high-grade EPDM (Ethylene Propylene Diene Monomer) rubber core permanently bonded to a 100% Virgin PTFE outer skin.
  • Ultimate Chemical & Weather Resistance: The PTFE shield provides a near-universal 0–14 pH barrier against aggressive chemicals, while the EPDM core ensures excellent ozone, weathering, and aging resistance.
  • Low-Torque Sealing Excellence: Specifically designed for fragile piping systems (Glass-Lined, Plastic, FRP, and PVC) where a gas-tight seal must be achieved at very low bolt loads to prevent flange cracking.
  • Superior Elastic Recovery: Unlike solid PTFE which “creeps” or “cold flows,” the EPDM inner core acts as a high-tension spring, maintaining constant sealing pressure even during thermal cycling and vibration.
  • Concentric Sealing Ribs: The sealing face typically features multiple concentric molded ribs that concentrate the bolt load, creating high-pressure line-contact seals with minimal effort.
  • High-Purity & FDA Compliant: The virgin PTFE surface is non-toxic and meets FDA 21 CFR 177.1550 standards, making it safe for food, beverage, and pharmaceutical applications.

At Kriloha Ltd., we understand that “Rigidity” is often the enemy of a good seal in lightweight piping. When you are working with PVC, FRP, or Glass-Lined Steel, a standard hard gasket requires too much torque—risking a catastrophic flange failure. The Kriloha PTFE Bonded EPDM Gasket (SUNWELL 1330 Style) is our engineered solution for “Sensitive High-Integrity” joints. As a premier global supplier of industrial seals, Kriloha Gaskets has perfected the vulcanization process required to bond the world’s most slippery plastic to the world’s most resilient rubber.

The science behind the SUNWELL 1330 style is Functional Layering. The Virgin PTFE envelope handles the chemistry; it is chemically invisible to almost all process media. The EPDM core handles the physics; it provides the “memory” that PTFE lacks. Because EPDM is a true elastomer, it stays energized inside the joint, pushing back against the flanges even as temperatures fluctuate. At Kriloha, our gaskets feature a molded rib design on the faces, which allows the gasket to “bite” into the flange with up to 50% less torque than a flat gasket.

Manufacturing these gaskets at Kriloha involves a high-tech Heat-Bonding Vulcanization process. This ensures that the PTFE and EPDM are molecularly joined—they will not delaminate or “peel” even under vacuum or high-velocity flow. Whether you are managing a municipal water facility or a high-purity chemical lab, Kriloha PTFE Bonded EPDM Gaskets provide the mechanical agility and chemical invincibility your system demands. By choosing Kriloha Ltd., you are investing in a product that protects your fragile infrastructure while ensuring a permanent, leak-free barrier.

Primary Use Cases

  • Chemical Process Piping: Ideal for transporting acids, alkalis, and corrosive fluids in plastic or lined piping systems.
  • Water Treatment Plants: Providing a long-lasting, ozone-resistant seal for sodium hypochlorite and other treatment chemicals.
  • Pharmaceutical & Food Processing: Ensuring a sterile, non-contaminating seal in wash-down environments and high-purity fluid transfer.
  • Desalination Facilities: Handling brine and treated water where both chemical resistance and elastic recovery are required.
  • Semiconductor Manufacturing: Providing a clean, chemically inert seal for high-purity chemical delivery systems.
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FAQs

Why use a bonded gasket instead of a standard PTFE envelope?

Bonded gaskets are easier to install (no “bunching” of the envelope) and provide much better elastic recovery. The EPDM core prevents the “cold flow” leaks common with pure PTFE or simple envelopes.

Is this gasket suitable for vacuum service?

Yes. Because the PTFE is molecularly bonded to the EPDM core, it cannot be “sucked” into the pipe under vacuum, making it ideal for suction lines and distillation columns.

What is the maximum temperature for this gasket?

The gasket is limited by the EPDM core, typically rated for a continuous operating temperature of -40°C to +120°C (-40°F to +250°F).

Can I use these on standard raised-face steel flanges?

While they can be used on steel, they are specifically optimized for flat-face plastic or lined flanges where low bolt load is the primary concern. For high-pressure steel piping, a Kammprofile or Spiral Wound gasket is usually preferred.

Are these gaskets reusable?

While the EPDM core has excellent recovery, Kriloha always recommends a new gasket for critical chemical service to ensure the PTFE surface is pristine and free of any previous compression marks.

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