The GRACO DU2666 is an air-operated double diaphragm pump constructed primarily from polypropylene, with a stainless steel center section and Santoprene seats, balls, and diaphragm. It is designed for remote operation and is intended for transferring a wide range of fluids in industrial applications, offering robust performance in harsh environments.

Key Features:

• Air-operated double diaphragm pump
• Husky 1590, 1-1/2" NPT
• Polypropylene body, stainless steel center section, Santoprene seats, balls, and diaphragm
• Maximum free flow delivery: 100 gpm (378.5 lpm) (Note: Some sources list up to 150 gpm for similar models, but official GRACO documentation specifies 100 gpm for Husky 1590 PP)
• Maximum fluid working pressure: 120 psi (8.4 bar, 0.84 MPa)
• Compatible with a wide range of industrial fluids, especially those requiring chemical resistance and durability
• Patented, high-reliability closed center air valve (online serviceable)
• Epoxy-coated air section for tough environmental conditions
• Externally accessible air valve for quick, easy maintenance without uninstalling the pump
• Up to 5 times longer diaphragm life compared to other air-operated diaphragm pumps in its class
• Fewer parts than industry peers, enhancing reliability and ease of maintenance

Applications:
Ideal for transferring chemicals, solvents, and abrasive or viscous fluids in industries such as mining, agriculture, chemical processing, and general industrial maintenance. Suitable for remote or hard-to-access locations due to its remote pump configuration.

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 fittings and gaskets for the intended fluid and pressure
• Follow GRACO’s recommended maintenance schedule for air valve and diaphragm inspection
• Check for correct air supply and exhaust port connections (3/4" NPT female for exhaust)
• Regularly inspect and clean the pump and its components
• Replace worn or damaged diaphragms, seats, and balls promptly
• Monitor for leaks and unusual noises during operation
• Consult the GRACO manual for specific installation and troubleshooting guidance