The GRACO DB3966 is an air-operated double diaphragm pump with an aluminum center section, polypropylene seats, Santoprene balls, and Santoprene diaphragm. It is designed for industrial fluid transfer applications, offering robust construction and reliable performance in demanding environments.

Key Features:

• Air-Operated Double Diaphragm Pump
• Husky 1590, 1-1/2" NPT
• Aluminum center section, polypropylene seats, Santoprene balls, Santoprene diaphragm
• Maximum free flow delivery: 100 gpm (378.5 lpm)
• Maximum fluid working pressure: 120 psi (8.4 bar, 0.84 MPa)
• Industrial fluids such as asphalt sealer, antifreeze, detergents, motor oil, hydraulic fluid, cutting oil, water, and wastewater
• Patented, high-reliability closed center air valve
• Online serviceable for ease of maintenance
• Epoxy-coated air section for tough environmental conditions
• Maximum pump speed: 200 cpm
• Maximum suction lift: 20 ft (6.1 m) dry
• Maximum size pumpable solids: 0.19 in (4.8 mm)
• Maximum operating temperature: 150°F (65.5°C)

Applications:
Industrial fluid transfer, including asphalt sealer, antifreeze, detergents, motor oil, hydraulic fluid, cutting oil, water, and wastewater

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with existing equipment.
• Ensure all connections are tight and leak-free before operation
• Follow manufacturer guidelines for air supply and fluid compatibility
• Regularly inspect diaphragms, balls, and seats for wear and replace as needed
• Use appropriate thread sealant for NPT connections
• Perform routine inspections and maintenance as recommended by GRACO
• Replace worn or damaged components promptly to avoid downtime
• Keep the pump clean and free from debris