The GRACO DB2777 is a 1-1/2 inch (38.1 mm) NPT standard air-operated double diaphragm pump constructed with a polypropylene (PP) body, aluminum (AL) center section, and Buna-N (BN) seats, balls, and diaphragm. It is designed for reliable fluid transfer in industrial applications, offering robust performance and compatibility with a wide range of fluids.

Key Features:

• Air-Operated Double Diaphragm Pump
• Husky 1590, 1-1/2 in. (38.1 mm) NPT
• Polypropylene (PP) body, Aluminum (AL) center section, Buna-N (BN) seats, balls, and diaphragm
• Maximum free flow delivery: 100 gpm (378.5 lpm)
• Maximum fluid working pressure: 120 psi (8.4 bar, 0.84 MPa)
• Compatible with a wide range of industrial fluids; not suitable for all chemicals—check chemical compatibility before use
• Patented, high-reliability closed center air valve that is online serviceable
• Epoxy-coated air section for tough environmental conditions
• Up to 5 times longer diaphragm life compared to other air-operated diaphragm pumps in its class
• Fewer parts than industry peers; air valve is externally accessible for quick service without uninstalling the pump
• No seals to leak or fail
• Quiet running (less than 85 dBa) with easy-to-use remote muffler capability
• Easy-to-service air valve and ball checks

Applications:
Industrial fluid transfer, including chemical processing, water treatment, mining, agriculture, and general manufacturing. Suitable for handling abrasive, viscous, or corrosive fluids where robust and reliable pumping is required.

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 to prevent vibration and leaks
• Use appropriate pipe fittings and gaskets rated for the intended fluid and pressure
• Follow manufacturer’s guidelines for air supply and pressure settings
• Regularly inspect and maintain the pump, especially the air valve and diaphragm, for optimal performance
• Consult the equipment manual for specific installation and maintenance procedures