The GRACO 557431 is a black rupture disk designed for use as a safety component in GRACO lubrication and fluid handling systems. It is intended to rupture at a specified pressure, providing a visual and functional indicator of system overpressure. The material is not explicitly stated, but rupture disks are typically made from metal or composite materials. Its primary function is to protect equipment by releasing pressure if it exceeds safe operating limits.

Key Features:

• Rupture Disk
• 11/16 in (0.688 in, 17 mm diameter)
• Maximum working pressure: 900 psi (62 bar)
• Used with MJ, MSP, MHH, and MXP Divider Valves
• Black color for easy identification
• Rupture-to-atmosphere indicator for system safety
• Reliable overpressure protection
• Easy to replace as part of routine maintenance

Applications:
Used in GRACO lubrication and fluid handling systems to provide overpressure protection and visual indication of system status. Suitable for industrial, mining, and agricultural equipment where reliable pressure management is critical.

Installation Notes:

• Using genuine GRACO rupture disks ensures proper fit, performance, and safety in critical applications.
• Always replace rupture disks with the correct part number and pressure rating for your system.
• Inspect the disk and housing for damage before installation.
• Follow manufacturer guidelines for installation and maintenance.
• Regularly check the disk for signs of wear or rupture as part of routine maintenance.