The GRACO C20846 is a back-up ring used in proportioning pumps and automatic metering valves. Its material is not explicitly specified in available sources, but back-up rings are typically made from durable polymers such as PTFE or nylon. The part is designed to support and protect O-rings or quad rings within GRACO equipment, ensuring proper sealing and extending the life of the sealing components.

Key Features:

• Back-up ring
• C20846
• Compatible with GRACO proportioning pumps and automatic metering valves (e.g., Model 482)
• Supports and protects O-rings or quad rings
• Enhances sealing performance
• Extends the life of sealing components

Applications:
Used in GRACO proportioning pumps and automatic metering valves, such as the Model 482, to ensure reliable sealing and prevent extrusion of O-rings or quad rings under pressure.

Installation Notes:

• Using genuine GRACO back-up rings ensures proper fit, performance, and longevity of the sealing system, reducing the risk of leaks and equipment failure.
• Inspect the back-up ring for damage before installation
• Ensure the ring is installed in the correct orientation and position relative to the O-ring or quad ring
• Follow the equipment manual for specific installation procedures
• Regularly inspect back-up rings during routine maintenance
• Replace back-up rings if they show signs of wear or damage
• Use only genuine GRACO replacement parts for optimal performance