The GRACO 557433 is a replacement rupture disk designed as a safety component for GRACO lubrication and fluid handling systems. It is constructed to rupture at a specific pressure, providing a visual and functional indicator of system overpressure. The disk is typically made from a thin, engineered material (exact material not specified in available sources), and is intended for use as a rupture-to-atmosphere indicator in various GRACO divider valves.

Key Features:

• Rupture Disk
• 11/16 in (0.688 in, 17 mm) diameter
• 1450 psi (with tolerance ±500 psi in some references, but standard specification is 1450 psi)
• For use with MJ, MSP, MHH, and MXP Divider Valves
• Yellow color for easy identification
• Rupture-to-atmosphere indicator for system safety
• Reliable overpressure protection
• Easy to replace as part of routine maintenance

Applications:
Used as a safety device in GRACO lubrication and fluid handling systems, specifically as a rupture-to-atmosphere indicator for divider valves in industrial and mobile equipment.

Installation Notes:

• Using genuine GRACO replacement parts ensures proper fit, function, and safety in critical lubrication systems.
• Ensure system is depressurized before replacing the rupture disk
• Inspect the disk seat and surrounding components for damage or debris
• Install the disk according to the equipment manual instructions
• Verify correct orientation and secure seating of the disk
• Test system for leaks and proper operation after installation
• Regularly inspect rupture disks for signs of wear or damage
• Replace disks immediately if ruptured or compromised
• Keep spare disks on hand for quick replacement