The GRACO 555691 is a sealing O-ring made from Viton-A material with a 75 durometer hardness. It is designed to provide a reliable seal in various GRACO equipment, particularly in applications requiring resistance to chemicals and high temperatures.

Key Features:

• O-ring
• -127 (specific size not detailed in available sources, but typically refers to a standard dash size for O-rings)
• Viton-A (fluorocarbon rubber), 75 durometer
• Designed for use in GRACO equipment; specific models not listed
• Chemical resistance
• High temperature resistance
• Reliable sealing performance
• Durable construction

Applications:
Used as a sealing component in GRACO pumps, sprayers, and other fluid handling equipment where resistance to harsh chemicals and high temperatures is required.

Installation Notes:

• Using genuine GRACO O-rings ensures proper fit, seal integrity, and equipment longevity.
• Ensure equipment is clean and free of debris before installation.
• Lubricate O-ring with compatible lubricant if recommended by the manufacturer.
• Inspect O-ring for damage or wear before installation.
• Replace O-ring during routine maintenance or if leaks are detected.