The GRACO DB5666 is a double diaphragm pump constructed with a PVDF fluid section, aluminum center section, and SP (Santoprene) seats, balls, and diaphragm. It is designed for reliable, high-flow transfer of aggressive chemicals and fluids in industrial applications.

Key Features:

• Air-operated double diaphragm pump
• Husky 1590, 1-1/2 in. (38.1 mm) NPT
• PVDF fluid section, aluminum center section, SP (Santoprene) seats, balls, and diaphragm
• Maximum flow rate: 100 gpm (378.5 lpm)
• Maximum discharge pressure: 120 psi (8.4 bar, 0.84 MPa)
• Compatible with a wide range of aggressive chemicals and industrial fluids
• Lube-free operation
• Epoxy-coated air section for tough environmental conditions
• Externally accessible air valve for easy maintenance
• Fewer parts than industry peers
• Up to 5 times longer diaphragm life compared to other air-operated diaphragm pumps in its class

Applications:
Industrial fluid transfer, chemical processing, wastewater management, and other applications requiring robust, chemical-resistant pumping solutions.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with existing equipment.
• Ensure proper alignment of inlet and outlet connections
• Use appropriate thread sealant for NPT connections
• Verify compatibility of pump materials with the fluid being transferred
• Regularly inspect and maintain the air valve and diaphragm for optimal performance
• Periodically check for leaks and wear
• Service the air valve and diaphragm as needed without uninstalling the pump
• Follow manufacturer guidelines for diaphragm replacement and lubrication-free operation