The GRACO DF4977 is a standard air-operated double diaphragm pump with a 2-inch NPT connection, featuring an aluminum center section, polypropylene seats, and Buna-N balls and diaphragm. It is designed for reliable, efficient fluid transfer in demanding industrial environments.

Key Features:

• Air-operated double diaphragm pump
• Husky 2150, 2" NPT
• Aluminum center section, polypropylene seats, Buna-N balls and diaphragm
• Up to 150 gpm (568 lpm)
• Up to 120 psi (8.4 bar, 0.84 MPa)
• Compatible with a wide range of industrial fluids; suitable for use in various GRACO equipment and systems
• Stall-free low pulsation air valve for smooth and rapid changeover
• Up to 40% improved efficiency
• Up to 5 times longer diaphragm life compared to other air-operated diaphragm pumps
• Fewer parts than industry peers; air valve is externally accessible for easy maintenance
• Lube-free operation
• Epoxy-coated air section for tough environmental conditions

Applications:
Ideal for transferring a wide range of fluids in industrial, mining, agricultural, and manufacturing settings. Suitable for handling abrasive, viscous, or corrosive fluids.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety. Non-genuine parts may compromise pump efficiency and longevity.
• Ensure proper alignment and secure mounting of the pump
• Use appropriate piping and fittings for the intended fluid and pressure
• Follow manufacturer guidelines for air supply and fluid connections
• Regularly inspect and maintain accessible air valve and diaphragm for optimal performance