The GRACO 557721 is a replacement O-ring made from 70 durometer Viton (brown), designed for sealing applications within GRACO lubrication and fluid handling equipment.

Key Features:

• O-ring
• Viton (fluorocarbon rubber), 70 durometer
• Designed for use in GRACO lubrication and fluid handling systems; consult equipment manual for specific compatibility
• High chemical resistance due to Viton material
• Durable construction for reliable sealing in demanding environments
• Easy to replace as part of routine maintenance

Applications:
Used as a sealing component in GRACO automatic lubrication systems, pumps, and fluid handling equipment to prevent leaks and maintain system integrity.

Installation Notes:

• Using genuine GRACO O-rings ensures proper fit, performance, and longevity of the equipment, reducing the risk of leaks and downtime.
• Inspect the O-ring and mating surfaces for damage or contamination before installation
• Lubricate the O-ring with a compatible lubricant to ease installation and prevent damage
• Ensure the O-ring is seated properly in its groove before reassembling the component
• Replace O-rings during routine maintenance or whenever leaks are detected