The GRACO 557821 is a miniature gear pump designed for use in lubrication systems. It is constructed from metal and is intended for in-plant machinery applications, specifically for use with series progressive oil lubrication systems and single line resistive oil lubrication systems.

Key Features:

• Electric gear pump
• Miniature Meter-Flo®, .0321 cu in/rev
• Metal
• 14 cu in/min (229 cc/min)
• Maximum working pressure: 1000 psi (68.9 bar, 6890 kPa, 6.9 MPa)
• Series Progressive Oil Lubrication Systems; Single Line Resistive Oil Lubrication Systems
• Adjustable internal relief protects pump from excessive pressures (factory set at 1,000 psi)
• Reliable performance for continuous duty cycles
• Compact and robust design for in-plant machinery
• Easy to maintain and integrate into existing systems

Applications:
Primarily used for in-plant machinery lubrication, including large-scale industrial and manufacturing environments.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with GRACO lubrication systems.
• Ensure proper alignment and secure mounting of the pump
• Connect to compatible lubrication systems as specified
• Verify fluid compatibility (oil, viscosity range: 160–15,000 cSt)
• Follow all electrical safety guidelines during installation
• Regularly inspect and maintain the pump for long-term reliability