Phenolic Insulation Gasket Kit – Type F, 4 Inch, Class 300LB

The Phenolic Insulation Gasket Kit is a high-performance solution designed to electrically isolate flanges and prevent galvanic corrosion in critical piping systems. This Type F kit, suitable for 4-inch, Class 300LB raised face flanges, offers reliable sealing, electrical insulation, and mechanical strength for industrial applications such as oil & gas, petrochemical, marine, and power generation.

The core component of the kit is a phenolic gasket, manufactured from durable, non-conductive laminated phenolic material that offers excellent compressive strength and moisture resistance. It is equipped with a Nitrile (Buna-N) O-ring seal, providing effective sealing against a variety of fluids including oils, fuels, and water-based media. Nitrile is known for its resilience and flexibility, making it ideal for medium-pressure and temperature applications.

To ensure complete electrical insulation across the bolted flange connection, the kit includes G10 insulating sleeves and washers, which prevent metal-to-metal contact and block stray electrical currents that could cause accelerated corrosion or system degradation. Additionally, ZPS (Zinc-Plated Steel) backup washers are provided to protect the insulating components from mechanical stress and to ensure proper torque distribution during installation.

This kit is ideal for insulating raised face flanges where full-face (Type E) coverage is not required, providing an efficient and cost-effective solution without compromising performance.

Key Features:

• Type F Gasket: Fits within the raised face area only, offering ease of installation.

• Phenolic Laminate Construction: Rigid, non-conductive, and corrosion-resistant.

• Nitrile O-Ring Seal: Reliable sealing against hydrocarbons and water-based fluids.

• G10 Sleeves and Washers: Superior electrical isolation and chemical resistance.

• ZPS Backup Washers: Reinforce assembly and enhance corrosion protection.

Engineered for long-term reliability, this insulation gasket kit helps extend the lifespan of flange joints while maintaining electrical and sealing integrity in demanding service environments.

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