The GRACO 521691 is a replacement gasket designed for use in GRACO fluid handling equipment. It is constructed with a PTFE-encapsulated fluoroelastomer, providing excellent chemical resistance and sealing performance. This gasket is intended to ensure leak-free operation and reliable sealing in filter assemblies and other pressurized fluid systems.

Key Features:

• Replacement Gasket
• 4.75 Inch OD (Outer Diameter)
• PTFE-encapsulated fluoroelastomer
• Designed for use in GRACO filter assemblies and compatible fluid handling equipment
• Excellent chemical resistance
• Reliable sealing performance
• Durable construction for extended service life
• Ease of maintenance and replacement

Applications:
Used in GRACO low pressure fluid filters and other fluid handling systems where a robust, chemical-resistant seal is required.

Installation Notes:

• Using genuine GRACO replacement gaskets ensures optimal fit, performance, and safety in pressurized equipment.
• Ensure the cover gasket groove is clean and free of debris before installation.
• Replace the gasket if the cover has ever been tightened down, as this may compromise the seal.
• Close the cover and alternately tighten clamp assemblies in small increments to the recommended torque (30-45 ft-lb or 40-60 N•m).
• Always relieve system pressure before removing, cleaning, or servicing the filter.